Professor Iaccarino provides a window into intriguing physical phenomena, the challenges of extreme-scale computations and simulations illustrating the fascinating beauty of fluid turbulence.
Presentation using a pair of books to expand possibilities inherent in chemical and electromagnetic interaction leading to some wider speculation about the role the rich structure of H₂O has had and continues to have in shaping Life of this planet. Consequent linkage to persistent themes within our Supervenience project and wider orbit.
What is Fluid ? What is Flow ?
Let us first define what a fluid ? and What is flow ?
Fluid is a liquid, gas, and air.
Flow is the continuous movement of a fluid from one place to another.
What is Laminar Flow ? What is Turbulent Flow ?
Two types of flows, namely laminar flows and turbulent flows.
Laminar flow is a 'simple' flow, while Turbulent flow is a 'complicated' flow.
In a laminar flow, all the molecules in the fluid move in the same direction and at the same speed.
In a turbulent flow, however, the molecules in the fluid move in different directions and at different speeds.
Turbulent motions are very common in Nature.
Turbulence occurs nearly everywhere:
in the oceans,
in the atmosphere,
in rivers,
even in stars and galaxies.
In fact, it is easier to find a turbulent flow than
a really laminar flow.
Here are a few examples of turbulent flows:
The wake of a ship or submarine is turbulent.
The swirls and eddies in a fast flowing river are turbulent.
The air currents in the atmosphere are turbulent.
Turbulence was observed when volcano erupts.
The outer layer of the Sun, i.e. the convection zone, is highly turbulent.
Types of Turbulence
Wall turbulence:
Free turbulence:
Convective turbulence
Presentation using a pair of books to expand possibilities inherent in chemical and electromagnetic interaction leading to some wider speculation about the role the rich structure of H₂O has had and continues to have in shaping Life of this planet. Consequent linkage to persistent themes within our Supervenience project and wider orbit.
What is Fluid ? What is Flow ?
Let us first define what a fluid ? and What is flow ?
Fluid is a liquid, gas, and air.
Flow is the continuous movement of a fluid from one place to another.
What is Laminar Flow ? What is Turbulent Flow ?
Two types of flows, namely laminar flows and turbulent flows.
Laminar flow is a 'simple' flow, while Turbulent flow is a 'complicated' flow.
In a laminar flow, all the molecules in the fluid move in the same direction and at the same speed.
In a turbulent flow, however, the molecules in the fluid move in different directions and at different speeds.
Turbulent motions are very common in Nature.
Turbulence occurs nearly everywhere:
in the oceans,
in the atmosphere,
in rivers,
even in stars and galaxies.
In fact, it is easier to find a turbulent flow than
a really laminar flow.
Here are a few examples of turbulent flows:
The wake of a ship or submarine is turbulent.
The swirls and eddies in a fast flowing river are turbulent.
The air currents in the atmosphere are turbulent.
Turbulence was observed when volcano erupts.
The outer layer of the Sun, i.e. the convection zone, is highly turbulent.
Types of Turbulence
Wall turbulence:
Free turbulence:
Convective turbulence
Elaine Buckholtz, a light artist and designer who teaches at Stanford University, discusses how modern technological tools like the ones in Schlaepfer's works change a viewer's experience of wonder.
LECTURE 13. LIGHTHubble space telescope observations have tak.docxwashingtonrosy
LECTURE 13. LIGHT
Hubble space telescope observations have taken advantage of gravitational lensing to reveal the largest sample of the faintest and earliest known galaxies in the universe. Some of these galaxies formed just 600 million years after the Big Bang.
Space, mass, light and time are fundamental descriptors of our Universe. Captured by the poetry in Genesis, “In the beginning, when God created the heavens and earth, the earth was a formless wasteland, and darkness covered the abyss, while a mighty wind swept over the waters. Then God said “Let there be light,” and there was light.
The cosmological model of the “Big Bang” describes how the universe expanded from an initial state of very high density and high temperature. If observed conditions today areextrapolated backwards in time using the known laws of physics, the prediction is that our Universe emerged from a singularity, a point of infinite density, and that before this event, space and time did not exist.
Current knowledge is insufficient to determine if anything existed prior to the singularity. Sixteen centuries ago, in his Confessions, Saint Augustine (354-430) posed the obvious question in biblical terms: What was God doing before he created the Universe?
ISAAC NEWTON: COLOR SPECTRUM and the CORPUSCULAR THEORY of LIGHT
Our modern understanding of light and color begins with Isaac Newton (1642-1726) and a series of experiments that he published in 1672. He was the first to understand the rainbow. He refracted white light with a glass prism, resolving it into its component colors: red, orange, yellow, green, blue and violet.
In the graphic below, light enters the prism from the top right, and is refracted by the glass. The violet is bent more than the yellow and red, so the colors separate.
In the 1660s, Newton began experimenting with his “celebrated phenomenon of colors.” At the time, people thought that color was a mixture of light and darkness, and that prisms colored light. Hooke was a proponent of this theory of color, and had a scale that went from brilliant red, which was pure white light with the least amount of darkness added, to dull blue, the last step before black, which was the complete extinction of light by darkness. Newton believed this theory was false.
Newton set up a prism near a window at his boyhood home in Woolsthorpe, England ( site of the famous apple tree), and projected a beautiful spectrum 22 feet onto the far wall. Further, to prove that the prism was not coloring the light, he refracted the spectral light back together, producing white light. Incidentally, he was at home because all the students at Cambridge University where he was a student were sent home because of an epidemic of the bubonic plague. In 1665, it was a version of “social distancing.” BTW, Newton did his best work working from home.
On a personal note, my wife and I once visited the hometown of William Shakespeare (1564-1616), Stratford-upon-Avon..
Cosmic Adventure Episode 2.04 Where did these equations come from?Stephen Kwong
Maxwell made a clever suggestion to detect the presence of the aether which formed the model basis of the Michelson and Morley experiment. The excalibur was inserted into the stone.
Clusters of microscopic closed 2-brane entities as a possible candidate for d...Hari Kumar
Abstract
The existence of closed 2-brane , bubble-like entities are within the realm of possibility of String Theory. It is proposed that quantum fluctuations are continuously creating such microscopic bubble-like entities, which I call repellons. Repellons are called thus since they would be gravitationally repulsive (have negative gravitational mass) with respect to normal matter in our universe. Repellons will be physically imperceptible and will manifest only as a gravitationally repulsive force field. Although repellons are repelled by normal matter, they are mutually gravitationally attractive. Since they are repelled by normal matter, there is a continuous transit of outward going repellons from large bodies such as planets and stars. These repellons eventually accumulate in regions of space that are free of any attractive gravity or where the gravitational effects of nearby bodies cancel each other (such as Lagrange points). With the stellar, planetary and intra-galactic dynamics a good portion of the repellons generated within galaxies find their way to its outer peripheries and get deposited in the galactic halos. These repellon deposits in the galactic halos cause a soft gravity ‘hill’ wrapping around the galaxy. The gravity hills keep the peripheral stars in the galaxy within it and account for the observed higher velocity of these stars, which is attributed to dark matter. The continuous generation of repellons in the intergalactic spaces causes the galaxies to move further apart accounting for the observed accelerated expansion of the universe, a phenomenon attributed to dark energy. This paper, besides presenting much supporting evidence also proposes a variety of doable tests that can confirm/falsify the repellon theory.
Mathematics is important in our daily life. In any where we can see mathematics. In this world all are connected with mathematics. Here is mathematics in nature.
Today most people on Earth are connected through wired or wireless networks, or both. The next leap in connectivity will give people the ability to control objects and machines. The Internet of Everything (IoE) will tag objects with tiny wireless devices for communication, computation and sensing. Some projections show demand for such IoE smart sensors will grow from billions to trillions within a decade. The essential enabling technology is an ultra-low power smart radio to provide a unique IP address and location. In this talk, Amin Arbabian discusses how he developed an ant-sized wireless-powered radio chip that costs pennies to fabricate– making it cheap enough to become the missing link to enable the Internet of Everything.
Embedded computing is everywhere. It is in our car engines, refrigerators, and even in the singing greeting cards we send. With improvements in wireless technology, these systems are starting to talk with each other, and they are appearing in places like our shoes and wrists to monitor our athletic activity or health. This emerging Internet of Everything (IoE) has tremendous potential to improve our lives. But like any powerful technology, it also has a dark side: it will observe and implement many of our actions. Security in the IoE is likely to be even more critical than general Internet security. After reviewing some of the challenges in creating a secure IoE, Horowitz will describe a new research program at Stanford to address this issue.
Wireless has evolved from Marconi's station-to-station telegraphy, to audio and video broadcasting, to today’s person-to-person mobile digital communications. Each transition has surprised even the revolutionaries who brought it about, and each transformed civilization. We expect similar disruptions from the next phase of interconnectivity, in which a trillion objects join the conversation. Tech pundits have long talked about an Internet of Things, a vision most often dominated by machine-to-machine communications in industrial settings. Lee will make the case for the Internet of Everything in which humans will be involved in the most compelling applications yet to emerge. He will describe some possible futures, and how Stanford engineers are working to overcome significant challenges to realize those futures.
Professor Dionne explores the unique and enabling properties of nano-sized materials, with applications ranging from highly efficient solar-renewable technologies to optical computers and cloaks of invisibility.
Stanford Engineering Professor Olav Solgaard describes how optical fibers can be used to provide a crisp, three-dimensional window into human anatomy at a cellular level.
Engineers are leading the push to create greener products that will help us meet current and future sustainability challenges. Stanford Engineering Professor Mike Lepech discusses the impact of green engineering on our planet and on our daily lives.
Stanford Engineering Professor Monica Lam discusses her lab's work in developing an open social network aimed at giving users better control of their data and greater privacy.
Online communities are powerful but often out of reach to the poor and geographically isolated for technical and literacy reasons. Mobile phones can address both of these gaps. Stanford Engineering Professor Scott Klemmer and colleagues have pioneered voice-based social media tools to help rural communities connect online.
Stanford Engineering Professor Ingmar Riedel-Kruse describes how he's creating biotic games in which humans play with real biological processes at microscopic scale. The goal is to enable crowd-sourcing of the scientific method to yield real-world advances in biotechnology.
Stanford Engineering Professor Christina Smolke explains how advances in synthetic biology are revolutionizing medical treatment, prevention and diagnosis of disease. She made this presentation at the school's annual eDay (Engineering Day) event.
Judy Estrin, CEO of JLabs LLC and a serial entrepreneur discusses why innovation is so important and what it takes to be an entrepreneur. Estrin was involved in the development of TCP/IP and is a former Cisco CTO. A Stanford Engineering alum, she spoke at the school's annual eDay event.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
GraphSummit Singapore | The Future of Agility: Supercharging Digital Transfor...Neo4j
Leonard Jayamohan, Partner & Generative AI Lead, Deloitte
This keynote will reveal how Deloitte leverages Neo4j’s graph power for groundbreaking digital twin solutions, achieving a staggering 100x performance boost. Discover the essential role knowledge graphs play in successful generative AI implementations. Plus, get an exclusive look at an innovative Neo4j + Generative AI solution Deloitte is developing in-house.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
By Design, not by Accident - Agile Venture Bolzano 2024
Turbulence and Computing: Beauty and the Beast - Assistant Professor Gianluca Iaccarino
1. Beauty & the Beast
Turbulence and Computing
Gianluca Iaccarino
Joe W. Nichols & John Axerio-Cilies
Mechanical Engineering Department
Center for Turbulence Research, Stanford University
Monday, July 23, 12
3. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
Monday, July 23, 12
7. Composition VI
Wassily Kandinsky (1913)
Monday, July 23, 12
8. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
Monday, July 23, 12
9. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
But chaos/randomness does not completely illustrate the nature of flow
turbulence. There is structure in the chaos!
Monday, July 23, 12
13. Starry Night
Vincent van Gogh (1889)
Monday, July 23, 12
14. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
But chaos/randomness does not completely illustrate the nature of flow
turbulence. There is structure in the chaos!
Monday, July 23, 12
15. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
But chaos/randomness does not completely illustrate the nature of flow
turbulence. There is structure in the chaos!
Another important characteristic of turbulence is the presence of multiple
scales - small eddies and large eddies
Monday, July 23, 12
19. Great Wave
Katsushika Hokusai (ca 1700)
Monday, July 23, 12
20. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
But chaos/randomness does not completely illustrate the nature of flow
turbulence. There is structure in the chaos!
Another important characteristic of turbulence is the presence of multiple
scales - small eddies and large eddies
Monday, July 23, 12
21. Turbulence...the “beauty”
The word turbulence (from the latin word turbulentia) originally refers to
the disorderly motion of a crowd (turba). In the Middle Ages it was
frequently used to mean just "trouble", a word which derives from it.
Its scientific usage refers to irregular and seemingly chaotic motion of a fluid.
But chaos/randomness does not completely illustrate the nature of flow
turbulence. There is structure in the chaos!
Another important characteristic of turbulence is the presence of multiple
scales - small eddies and large eddies
The inherent beauty of turbulent motion attracts artists, but it is its inherent
complexity and ubiquitous presence that interests physicists, mathematicians
and engineers
Monday, July 23, 12
22. Studying Turbulence
Over five centuries ago Leonardo was probably the first to use the word
turbulence (in Italian turbolenza) with its modern meaning and to
observe the slow decay of eddies formed behind the pillars of a bridge.
Monday, July 23, 12
23. Studying Turbulence
Leonardo da Vinci, Codex Atlanticus (ca 1500)
areneg is auqcalled aznelobrut al euoD
ohgulp eneitnam is aucalled aznelobrut al euoD
asopiris auqcalled aznelobrut al euoD
Monday, July 23, 12
24. Studying Turbulence
Leonardo da Vinci, Codex Atlanticus (ca 1500)
areneg is auqcalled aznelobrut al euoD
ohgulp eneitnam is aucalled aznelobrut al euoD
asopiris auqcalled aznelobrut al euoD
Doue la turbolenza dellacqua si genera
Doue la turbolenza dellacua si mantiene plugho
Doue la turbolenza dellacqua siriposa
Monday, July 23, 12
25. Studying Turbulence
Leonardo da Vinci, Codex Atlanticus (ca 1500)
areneg is auqcalled aznelobrut al euoD
ohgulp eneitnam is aucalled aznelobrut al euoD
asopiris auqcalled aznelobrut al euoD
Doue la turbolenza dellacqua si genera
Doue la turbolenza dellacua si mantiene plugho
Doue la turbolenza dellacqua siriposa
Where is the turbulence in the water generated?
Where does the turbulence in the water persist for long time?
Where does the turbulence in the water come to rest?
Monday, July 23, 12
26. Studying Turbulence
The physics of turbulence has been studied extensively. using experiments.
Euler, Navier, Stokes, and later Taylor, Kolmogorov and many others built the
theoretical & mathematical foundations
Leonhard Euler George Gabriel Stokes Geoffrey Taylor Andrei Kolmogorov
1700s 1800s 1900s 1900s
Monday, July 23, 12
28. Energy spectrum
Kolmogorov
Theory
-5/3
Energy
Dissipation
into heat
Eddy Size
Monday, July 23, 12
29. Energy spectrum Where is the
turbulence in the
water generated?
Kolmogorov
Theory
-5/3
Energy
Dissipation
into heat
Eddy Size
Monday, July 23, 12
30. Energy spectrum Where is the
turbulence in the
water generated?
Kolmogorov
Theory
-5/3
Energy
Where does the
turbulence in the
water come to
rest?
Dissipation
into heat
Eddy Size
Monday, July 23, 12
31. Energy spectrum Where is the
turbulence in the
water generated?
Kolmogorov
Theory
-5/3
Energy
Where does the
turbulence in the
water come to
rest?
Dissipation
into heat
Eddy Size
Monday, July 23, 12
32. Center for Turbulence Research
Prof. William C. Reynolds
Prof. Joel H. Ferziger
Prof. Parviz Moin
1987
Monday, July 23, 12
42. Slow Down a Formula 1 Car
John Axerio Cilies
Quieting A Jet
Joe Nichols
A New Planet in 7 Days
Gianluca Iaccarino
Monday, July 23, 12
43. A Project sponsored by
Toyota Motor Corporation
Motor Sport Division
Slow Down a Formula 1 Car
John Axerio Cilies
Monday, July 23, 12
44. A Project sponsored by
Toyota Motor Corporation
Motor Sport Division
Monday, July 23, 12
45. A Project sponsored by
Toyota Motor Corporation
Motor Sport Division
Brake Cooling...
Monday, July 23, 12
46. • Brake pads are air cooled and temperature is controlled
• Flow through the tire has an impact on the wake dynamics
Flow
in
Flow out
Monday, July 23, 12
68. Flow
and
noise
visualizaBon
FWH FWH
LES LES
Baseline
(NA2Z) Chevrons
(NA2C3)
Monday, July 23, 12
69. Effect
of
chevrons
Upstream Downstream
baseline baseline
chevrons chevrons
Chevrons
have
two
(good)
effects
on
noise:
1.Reduc3on
of
shock-‐associated
noise
(upstream)
2.Reduc3on
of
turbulent
mixing
noise
(downstream)
Monday, July 23, 12
70. a new planet in 7 Days
Alan Wray, Javier Jimenez, Parviz Moin, Ali Mani, Lee
Shunn, Frank Ham, Gianluca Iaccarino
Monday, July 23, 12
72. Keplerian turbulence
• Protoplanetary disks need to be turbulent to
form planets
• Simplest model is rotating, sheared box of
turbulence
x2
Ω
x1
x3
Monday, July 23, 12
73. Computations
Simulations
• Grid size: 8192x2048x2048 ~ 34 billion grid points
• Ran on 65536 CPUs (half of the machine)
• 10-20 Mhours/CPU
• FFT transforms require large data (full volume)
communication multiple times per time-step
Data processing
• Each saved data field: 384 GB
• Inverse FFT on entire dataset
must be performed to visualize
solution in physical space
Monday, July 23, 12
75. Energy spectrum
not all eddies are dying!
Low-Ro (fast rotation)
Monday, July 23, 12
76. Conclusions
• 7 days on BGL and still no planet
• Now we know what to look for and where
Monday, July 23, 12
77. Conclusions
• 7 days on BGL and still no planet
• Now we know what to look for and where
Monday, July 23, 12
78. center for turbulence research
Parviz Moin
Gianluca Iaccarino
Joe. W. Nichols
John Axerio-Cilies
Frank Ham
Heinz Pitsch
Marcus Herrmann
Thank You Turbulence & Computing
Beauty and the Beast
Monday, July 23, 12