October 2008 Issue 6 L INKED I N CFD A networking forum for CFD professionals Membership Report Inside This IssueOur membership roster currently stands at 568 members. Membership Report 1Interestingly, there seems to be slow down on our growth and Fish-Friendly Hydrotubines 1the rate is much slower than previous months. Nevertheless, this CFD for Architects 2group continues to be active evident from contributions to this Your Input 2newsletter and to the discussion forum. Employment 3As always, your feedback and suggestions for improving this group are welcome. EPRI‐supported blade strike testing at Alden to enhance Fish-Friendly Advanced survival of fish in the path of the blade. Other aspects of the turbine design, such as no gaps at the control gates and the Technology Hydroturbine rotating shroud attached to the runner, also contribute to increased fish survival by eliminating gaps where fish could be injured. Re‐Design and CFD Simulations of the Alden CFD simulations of the Alden /Concepts NREC hydroturbine (www.aldenlab.com) / Concepts NRE have been performed by Alden using Fluent 6.3.26 to determine the hydraulic performance of this turbine, By Matt Frain firstname.lastname@example.org ‐ Alden Research redesigned from the original pilot‐scale design to increase Laboratory, Inc. is completing the conceptual redesign and flow and power output for a given turbine size. The results CFD performance analysis of a novel hydroturbine intended of these simulations indicate that the design features, which to increase the survival of passing fish. This hydroturbine was enhance fish passage survival, do not significantly degrade initially developed under the U.S. Department of Energys the energy extraction performance of the turbine. The next Advanced Hydropower Turbine Systems Program. Fish phase of development includes preliminary engineering and passage survival rates as high as 96 to 98% for fish and 100% model testing by the turbine vendor, Voith Siemens Hydro for eels were recorded during a proof‐of‐concept study that of York, PA. This engineering and testing will lead to the was performed using a pilot‐scale turbine tested at Alden. production of a prototype unit for a demonstration project Even higher survival is predicted for full sized turbines with at the School Street Hydroelectric Generating Facility, thickened leading edges. The market for this turbine includes operated by Brookfield Renewable Power, located on the hydroelectric projects at sites with downstream passage Mohawk River in Cohoes, NY. concerns for migratory fish species. This turbine would greatly enhance the survival of fish passing through the turbines and would permit power generation using water otherwise bypassed around the turbines for fish passage. This redesign effort was supported by the Electric Power Research Joining UsInstitute (EPRI). Please encourage your CFD friends or colleagues to join our The key to the enhanced fish survival is a new hydroturbine LinkedIn CFD group. Please note that LinkedIn membership runner, designed in partnership with the turbomachinery is required for joining. To join, applicants should first sign in design company Concepts NREC of Wilder, VT. This runner on LinkedIn and then do a search in LinkedIn using design uses the minimum possible number of blades, Keywords: CFD in Category: Professional Group. Our group reducing the probability of a passing fish being struck by a should be the first on the list. Look for our logo. blade. The semi‐circular leading edge of theses blades have been thickened, a feature determined from the results of
Architectural Firms Benefitfrom Upfront CFDEveryday millions of people around the world go through their daily lives and probably do not think too much about their HVAC systems. The only time we really think about them, is when they aren’t working? But from an engineering perspective, it can be a challenge to ensure that people are simply “comfortable”. This is especially challenging when the weather fluctuates or when solar loading needs to be taken into account. Suppose there is a fire, how long will it take for a room to fill with smoke? How about reducing the cost of running the HVAC system? In today’s “green society”, these are questions that Architectural firms are challenged Often, the folks that need this information, know nothing or with everyday. very little about CFD. They are looking for a solution that can be used by designers, the non‐experts. They have a list of In the past, designers always relied on experience and rules certain requirements, certain criteria that must be satisfied. of thumb. If it didn’t work, you could always increase the Some CFD vendors are more geared for this type of problem size of the system, make alterations post‐installation or than others. The challenge for all is to change the way we retrofit an existing system. All of these options are costly think about applying tools to solve the problem. The tools and it is becoming more and more common that not only have to be easy to use but have to provide relevant requirements are being posed ahead of time that includes data that provides answers to the problem. simulations or “proof” that the system will work. Check out Derrek Cooper the image below that shows the smoke distribution in a Product Manager parking garage. www.cfdesign.com Your Input for Newsletter Do you have something to say to the CFD group? Then, say it here. Following is our current guidelines for your input: • Inputs should be no more than 500 words • Inputs should be in Microsoft Word format • Inputs should exclude any direct sales pitch (we don’t want to turn this into a billboard) • Inputs can include a link to send interested readers to the full story (pitch) It is not only the green movement that is causing interest in • Inputs can include one or two small images CFD. Just like product development, we are pushing the limits of the systems and we are cramming computers and Email us at: email@example.com other electronics into confined spaces. Think about how many data centers there are in the world? How does Google, Yahoo, Amazon etc keep their server rooms cool? Their challenges are obviously pretty extreme, but how about smaller scale companies that have data centers? Often, you walk into a data center and there are tiles popped out of the raised floor to try and alter the flow to cool a certain portion of the room. Check out the image below of a portion of a data center. We are seeing the temperatures and air flow patterns.
Employment(1) Looking for a combustion engineer with CFD near Toronto send an email to stefan@ aliado.se with name, contact by Lauren Nordgren du Bois ‐ firstname.lastname@example.org details and title of that person. If "your" candidate gets the job, you may be entitled to a Finders fee of SEK 5.000. A solid background in fluid dynamics, heat transfer and combustion with related experience demonstrating the For more information on the positions were currently effective use of this knowledge is a must. Strong ability to build working on, please visit www.aliado.se . This includes 11 simplified analytical models based on real systems, correctly positions at the above‐mentioned customer, for instance capturing the design intent. FEM‐Engineer and Acoustics Engineer. The position deals with analysis for input to the design of combustion chambers, burners, venting systems and pressure Applications and any questions can emailed to stefan@ vessels. Requires the development of both Computational Fluid aliado.se Dynamics and Finite Element Analysis projects. Performing simple to fairly complex simulations, depending on design (3) Skilled CFD Engineers/PhDs and professionals: requirements, with the objective of analysing and optimising opportunities in Belgium systems response to specific performance requirements. by Loïc Desiron ‐ email@example.com or firstname.lastname@example.org A minimum of 4 years CFD analysis experience using at least one of the main commercial codes FLUENT, ANSYS‐CFX, STAR‐ My client a worldwide operating software company, with CD or CFDRC is required, while for FEA previous experience in headquarters in Belgium and subsidiary in USA, is looking nonlinear analysis using Ansys, CosmosWorks, MSC Nastran or for talented Engineers to sustain its rapid growth. Algor will be an asset. Candidate must be able to present a work portfolio. Knowledge of solid modeling tools and ability to The company offers a stimulating, young and multicultural modify 3D models in order to fit simulation needs is highly environment in the heart of Europe, competitive benefits desired. (including profit sharing), excellent job growth Excellent analytical capabilities combined with some testing opportunities and a relocation package; Expat contract experience will help the candidate excel very quickly in this possible (very nice fiscal conditions). position. The software tools to be used are FLUENT (CFD), CosmosWorks / Algor (nonlinear FEA) and SolidWorks (CAD). These are some of the vacant positions Mechanical Engineering Degree with a Masters Degree Preferred. ‐ CAE analyst and design engineer ‐ Software Scientist/Engineer (2) Qualified CFD‐Engineer for customer in Gothenburg, ‐ Computational Aero‐Acoustic (CAA) Scientist/Engineer Sweden ‐ Mesh Generation Engineer by Stefan Kristoffersson ‐ email@example.com ‐ CFD Development Scientist/Engineers Swenox AB is a privately owned company located in Nykoping ‐ Software Scientist/Engineer expert in human‐computer and Gothenburg, Sweden. Our objective is to be a complete interaction technology partner for exhaust after‐treatment systems to the manufacturers of heavy trucks and buses. If you are interested please contact me and/or send me Our head office and production facilities are located in your CV at: Nykoping, near Stockholm, and our Technical Centre is in loic@ itelco.be Gothenburg. For more info see www.swenox.com loicdesiron@ gmail.com Now looking for a qualified CFD‐Engineer: ‐ Calculation and optimization of exhaust‐system flow ‐ Predominantly using Fluent but StarCD is a plus ‐ Some travel to customers within Gothenburg, to Södertälje and to Stuttgart is required. A valid work permit for Sweden is required as is a good command of both Swedish and English. Do you know someone with the right background? If so,
LinkedIn CFD firstname.lastname@example.org Group Manager Kamran Fouladi email@example.com Phone: 610-291-6642 E-Mail: CFDlinked@gmail.comPast issuesPast issues of this newsletter can be accessed at: http://www.infomec.cc/news.htm