LinkedIn CFD Group Newsletter.

1. October 2008
Issue 6
L INKED I N CFD
A networking forum for CFD professionals
Membership Report Inside This Issue
Our membership roster currently stands at 568 members. Membership Report 1
Interestingly, there seems to be slow down on our growth and Fish-Friendly Hydrotubines 1
the rate is much slower than previous months. Nevertheless, this CFD for Architects 2
group continues to be active evident from contributions to this Your Input 2
newsletter and to the discussion forum. Employment 3
As 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 mfrain@aldenlab.com ‐ 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 Energy's 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 Us
Institute (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

2. Architectural Firms Benefit
from Upfront CFD
Everyday 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: cfdlinkd@gmail.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.

3. 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 ‐ lauren@power-recruiting.net details and title of that person. If "your" candidate gets the
job, you may be entitled to a Finder's 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 we're 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/PhD's and professionals:
requirements, with the objective of analysing and optimising opportunities in Belgium
systems' response to specific performance requirements. by Loïc Desiron ‐ loic@itelco.be or loicdesiron@gmail.com
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 ‐ stefan@aliado.se ‐ 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,

4. LinkedIn CFD
cfdlinked@gmail.com
Group Manager
Kamran Fouladi
fouladi@infomec.cc
Phone:
610-291-6642
E-Mail:
CFDlinked@gmail.com
Past issues
Past issues of this newsletter can be accessed at:
http://www.infomec.cc/news.htm