Above lecture can be downloaded from www.zeusnumerix.com
The presentation deals with advanced topics in simulation in lecture 1 of 4. This is an elaborate lecture dealing with the field of aeroacoustics and its computational aspects. The lecture is very comprehensive and covers advanced topics like acoustics stealth, how computational aeroacoustics (CAA) is a special form of CFD and propagation of sound. Rigorous mathematical formulations are given like Fourier transform, Lighthill analogy, and equations by other scientists. Some practical examples are solved for the user.
This Presentation gives a brief idea on turbojet engines, their components, working principle and also on the materials used in both the hot and cold sections of the engine, applications, etc..
This Presentation gives a brief idea on turbojet engines, their components, working principle and also on the materials used in both the hot and cold sections of the engine, applications, etc..
RAMJET is a type of jet engine in which the air drawn in for combustion is compressed solely by the forward motion of the aircraft.
A ramjet uses this high pressure in front of the engine to force air through the tube, where it is heated by combusting some of it with fuel.
It is then passed through a nozzle to accelerate it to supersonic speeds. This acceleration gives the ramjet forward thrust.
The turbofan engine is a propulsive mechanism to combine the high thrust of a turbojet with the high efficiency of a propeller. Basically, a turbojet engine forms the core of the turbofan; the core contains the diffuser, compressor, burner, turbine, and nozzle. However, in the
turbofan engine, the turbine drives not only the compressor, but also a large fan external to the core. The fan itself is contained in a shroud that is wrapped around the core.
RAMJET is a type of jet engine in which the air drawn in for combustion is compressed solely by the forward motion of the aircraft.
A ramjet uses this high pressure in front of the engine to force air through the tube, where it is heated by combusting some of it with fuel.
It is then passed through a nozzle to accelerate it to supersonic speeds. This acceleration gives the ramjet forward thrust.
The turbofan engine is a propulsive mechanism to combine the high thrust of a turbojet with the high efficiency of a propeller. Basically, a turbojet engine forms the core of the turbofan; the core contains the diffuser, compressor, burner, turbine, and nozzle. However, in the
turbofan engine, the turbine drives not only the compressor, but also a large fan external to the core. The fan itself is contained in a shroud that is wrapped around the core.
Part 1 : general context and High intensity radiated Field ( HIRF)
After a rapid presentation concerning the evolution of technologies in the aeronautical domain based particularly on the use of composite materials and the increased role of electronics to ensure of critical functions, it is logical to examine which are the internal and external phenomena which could compromise the safety of the flight and the safety of operation with respect to electromagnetic threats.
For this purpose, a complete panorama of the electromagnetic phenomena is presented The origin of the specifications for HIGH INTENSITY RADIATED FIELD (HIRF) which are taken into account for the certification of the aircraft is largely approached at the level system but also at the level of equipment.
Part 2 : Lightning direct & indirect effect. Hardening and protection devices
After a presentation of lightning phenomenology for direct and indirect effect at system level but also at the equipment level according to the difficulties to produce an acceptable method of demonstration especially for the functional aspect This presentation is followed detailed and illustrated with description of various of CEM tests carried out in Faraday or better in anechoic chamber at the level of the equipment and the difficulty in reproducing the best as possible real installation.
The bases of the design of the circuit and protect devices are described as for the performances to satisfy in particular with regard to the concept of comprehensive and consistent hardening.
Unsteady Problems & Separation Studies @ Zeus NumerixAbhishek Jain
Above lecture can be downloaded from https://www.zeusnumerix.com
The presentation deals with advanced topics in simulation in lecture 2 of 4. The lecture aims at explaining the user, the specialized simulations required for unsteady flow. In the first part, simulation methodology and brief mathematical background is presented for unsteady flows. A detailed explanation is given for the multi-body problems. In these examples, the regeneration of mesh due to relative movement of the body is shown. Validation of the results is shown along with references.
Above lecture can be downloaded from www.zeusnumerix.com
The presentation deals with advanced topics in simulation in lecture 3 of 4. The lecture aims to introduce the user to optimization in CFD. Apart from explaining the usual CFD procedure, the presentation also showcases two case studies. In the first case study, an airfoil shape is optimized using the genetic algorithm approach. The 2D example shows the basics. A real-life 3D example of optimization of the winglet is shown. Variation in the aerodynamic performance of the winglet due to change in shape is elaborated. The optimization happens for bending moment and induced drag.
CEM Workshop Lectures (11/11): CEMExpert Usage of Almond Geometry for RCS Cal...Abhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 11 of 11. The lecture is in form of a tutorial to simulate the Radar Cross Section (RCS) of Almond Geometry. This geometry is analytically proven to have a very small RCS. Special GUI is created to parameterize and create different almond shapes. Validation of the software is shown with the results shown for far-field cases. Though not shown, nearfield cases can also be solved.
CEM Workshop Lectures (10/11): Numerical Modeling of Radar Absorbing MaterialsAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 10 of 11. The lecture aims to explain the method of modelling the Radar Absorbing Material (RAM). RAM is coated on aerospace or marine vehicle to reduce the radar cross-section. Most part of the lecture covers the effective medium theory and simulation of simple shapes to understand the theory. Alternative methods are elaborated along with few examples of comparison.
CEM Workshop Lectures (9/11): Modelling Electromagnetics FieldAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 9 of 11. The lecture aims to introduce the user to basic mathematics of modeling of EM field. Equations and/or their solutions are given for Plane wave, Lorentz guage, scalar and vector potential etc. Microwave propagation, antenna fields, vector wave equations and their boundary conditions are given. The final part of the lecture gives basics of Radar Cross Section and references.
CEM Workshop Lectures (8/11): Method of momentsAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 8 of 11. The lecture provides a theoretical basis for the simulation of electrodynamics problems. The mathematical formulation for the method of moments is elaborated. These methods are in the family of frequency-domain methods. Method of moments is used for objects of lower electrical size.
CEM Workshop Lectures (7/11): PO/PTD Solver for RCS ComputationAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 7 of 11. The lecture elaborates the PO-PTD scheme for simulating for the radar cross-section. The formulation works for objects of large electrical size. Software GUI is shown for the pre-processing of data, the input of boundary conditions and the post-processing of result. Simulations can be set up for entire 360 deg azimuth sweep. Polar plot of RCS is displayed for the entire sweep.
CEM Workshop Lectures (6/11): FVTD Method in CEMAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 6 of 11. The lecture explains the finite volume time-domain method and its implementation. The presentation explains the mathematical formulation of FVTD method and its advantages and disadvantages. Basic formulations are given for boundary conditions and higher-order discretization. Finally, examples are given for validation cases.
CEM Workshop Lectures (5/11): Best Practices in RCS PredictionAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 5 of 11. The lecture is designed such that it can be read independently. It covers the basics of electromagnetics, issues that can happen with the mesh, how to post-process the results and analysis. The general advice is given for setting up the simulation and use of boundary conditions.
CEM Workshop Lectures (4/11): CEM of High Frequency MethodsAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 4 of 11. The lecture focuses on the CEM methods used for high-frequency incident radiation. The methods explained are Geometric Optics and Physical Optics. PO-PTD and GO-GTD methods are mainly used for large objects where time-domain methods will be very expensive. Mathematical modeling, pitfalls and modifications to these methods are discussed.
CEM Workshop Lectures (3/11): Mesh Generation in CEMAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 3 of 11. The lecture is divided in two major parts with the first one giving the basics of mesh generation. First the basics of mesh generation are elaborated. Types of meshes like surface and volume mesh, structured and unstructured mesh is explained. After the basics, mesh quality requirements for different solvers are explained.
CEM Workshop Lectures (1/11): ABC of CEM and RCSAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
Computational Electromagnetics Workshop Lecture 1 of 11. The lecture explains in layman terms CEM methodology and theory. Basics are given for the electromagnetic simulation methods and how the radar cross-section is calculated. It is emphasized that the user of the software should understand the Maxwells equations and how to interpret the results.
CFD Lecture (8/8): CFD in Chemical SystemsAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
The presentation aims at explaining to the user the simulations that happen in the chemical industry. These simulations are characterized by the chemical reactions, mixing of fluids, particle flow etc. The standard NS equations requirement introduction of source terms and special methods for CFD simulations and these have been introduced.
CFD Lecture (7/8): Best Practices in CFDAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
The presentation gives an overview of the guidelines that the user needs to follow to get accurate results from CFD. Initial part of the presentation emphasizes that the mesh quality largely affects the solution accuracy. Meshing guidelines for flows are written. Use of proper boundary conditions and initial conditions is elaborated.
Above lecture can be downloaded from www.zeusnumerix.com
The presentation gives an overview of the teminologies used by the solvers of incompressible flow. CFD basics of the pressure based schemes are explained. All the terminologies used in the simulation set-up from boundary conditions (BCs), turbulence models, discretizing schemes and residuals etc. CFD solvers such as SIMPLE, SIMPLER are explained. The reader should be able to set up simulation after the presentation.
Above lecture can be downloaded from www.zeusnumerix.com
The presentation gives an overview of the teminologies used by the solvers of compressible flow. The presentation is based on the CGNS system. Differences between boundary conditions (BCs), labels, tags,and flow type, etc are enumerated. Different CFD schemes, turbulence models, domain motion are explained. At the end, user should be able to set up a compressible flow presentation.
Above lecture can be downloaded from www.zeusnumerix.com
The presentation gives an overview of the compressible flow starting with the equations in the integral form. Fundamentals such as Mach cone, wave theory, CFL number and time marching are explained. The presentation ends with explanation of different schemes like flux vector splitting for obtaining the solution. The focus is on the explanation of the physical basis of all these terms.
CFD Lecture (3/8): Mesh Generation in CFDAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
The presentation aims to disseminate information on the various types of meshes/grids. Mathematical formulations are given to quantify the quality of meshes like skewness. Grid continuity basics are given along with details examples of how to make Delaunay mesh. Similar detailed example is given for the advancing front method. To summarize, the presentation aims to instill the sense that mesh quality is important for simulation accuracy
Above lecture can be downloaded from www.zeusnumerix.com
The presentation aims to emphasize that the knowledge of fluid mechanics is essential to CFD simulation. How fluid mechanics helps us analyse the results is elaborated. The six steps of CFD are explained one by one from decision of computational domain, to meshing, BCs, simulation, visualization and analysis. Few examples of pitfalls in CFD simulations and references are given.
CFD Lecture (1/8): ZNTutor CFD- An IntroductionAbhishek Jain
Above lecture can be downloaded from www.zeusnumerix.com
The presentation gives an introduction to the 2D Software ZNTutor-CFD. The software aims to train novice engineers and students in the basics of CFD. The software starts with codes for 1D algorithms to explain the concept of Stencil, Upwinding and CFL number. 2D Wizard problems are designed from basic fluid mechanics course. The problems are pre-programmed and user can solve it and in turn learn the CFD process and terminologies. Advanced users are allowed to create problems and solve them. The software is a freeware and can be downloaded from www.zeusnumerix.com
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
1. 1Built-to-Spec | Product Approval | Engineering Services | Software Development
Aero-Acoustic Field & its
Modeling
Advanced topic on Aeroacoustics
Prof GR Shevare