CE 496 CFD in Engineering: FLUENT/GAMBIT Project Assignment: March 19, 2002

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CE 496 CFD in Engineering: FLUENT/GAMBIT

Project Assignment: March 19, 2002



Your CFD project will be your final assignment for CE496. You will be expected to
prepare
a final report and provide a 1/6 hour oral presentation before the class as your
final examination. Grades will be based on completeness, grammar, and rigorous use of
the Gambit and Fluent tools in the report and oral clarity and originality of the
presen
tation. Copies of the software files produced during the exercise should be
provided to the instructor on titled floppy disks (compressed by WinZIP if required).


Project Concept:


The choice of a project may be by the student with the approval of the ins
tructor.
The problem should be chosen to meet the following criteria:


a. It must be simple enough to be completed before May 2nd, yet complex enough
to stretch your use of the software.


b. If possible there should be some analytic or experimental comp
arable to
validate your solution approach. It is not necessary to validate all aspects of a solution
approach, but it is desirable to check submodules or an idealized version of your flow
field.


c. The problem may include solutions of the energy equatio
n, species equations
or some aspect of combustion. You may solve a steady
-
state or unsteady problem, the
problem can include free
-
surfaces, cyclic boundaries, fans, etc. as you choose. A
suitable problem may use either laminar or turbulent conditions.


P
roject Implementation:


The project should document the creation and definition of a suitable grid in
Gambit. (You may also import a grid from a CAD program if that is suitable and grid the
geometry). Provide a copy of a “cleaned” journal file on your rep
ort disk (ie. Try to make a
version without all the missteps you may have taken during your first efforts).


The project should document the conditions and boundary conditions selected for
your problem in Fluent (4.5, 5.5 or 6.0). Provide a copy of the re
levant *.cas file on your
report disk (if the *.dat files are too large do not provide copies).


Project Postprocessing:


Provide hard copies of relevant figures (contours, grids, path lines, vector fields,
etc.) as part of your final report. Prepare a pr
esentation, which includes these figures
preferably in Microsoft Powerpoint (Corel Presentations is also an option). A
transparency presentation is acceptable if you do not have powerpoint skills. Provide the
instructor with 2 copies of the report (one t
o markup and return to you). Provide a copy of
any powerpoint presentation on your report disk.


Time Line:


April 9


Provide instructor with one page abstract describing your
choice of project.


April 18


Try and complete Gambit grid construction by this

date


April 25


Try and complete Fluent calculations by this date


May 2



Turn in written report to instructor, 12 students present


May 9



Complete all presentations, 13 students present, turn in report
disks.

POSSIBLE PROJECTS CE496 Section 3: CFD in Engineering


1.

Flow about a building on fire with a broken window: This project would involve simulating the
behavior of a fire inside a simple 2 or 3d building where wind is flowing about the building and a
window breaks and allows fire products to escape outside. See

Case Studies by CFX5 on web at:




http://www.software.aeat.com/cfx/cases/detail.asp?id=61




http://www.software.aeat.com/cfx/cases/detail.asp?id=60



2.

Consider the sloshing of gasoline inside an automobile fuel tank. This project would involve the
simulation of the behavior of the two phase (gasoline and air) fluids moving with an inte
rface inside
a fuel tank. You could see the influence of different mitigation designs (barriers, porous plates,
etc.) On the flow behavior. See Application Tutorials by Fluent on web at:



http://learningcfd.com/login/fluent/intermedi
ate/tutorials/tank_sloshing/tank_sloshing.hm


3.

Consider the behavior of bubbles moving in a beer glass. This project involves solving for the
secondary circulation induced by bubbles forming on the bottom of a beer stein or glass. It was
used by Flue
nt as an advertising concept a few years back.




http://www.fluent.com/////about/news/newsletters//99v8i2/a12.htm



http://www.fluent.com///////about/news/pr/pr5.htm




See a similar problem at:




http://learningcfd.com/login/fluent/intermediate/tutorials/boil/boil.htm


4.

Consider the airflow about an automobile. Evaluate the
effects of changes in under carriage, body
shape, bumpers, etc. on drag and lift on a typical automotive shape. As an example see the work
done on the Opel Astra at:




http://www.fluent.com/solutions/articles/ja132.pdf



5.

Consider the influence of the effect of air deflectors on the roof of tractor trailer rigs. Try varying
the shape and size of deflectors to arrive at a “best” design. See Fluent News Volume 6, Issue 2,
Autumn 1997.




http://www.fluent.com/about/news/newsletters/97v6i2/a6.htm



6.

Consider the flow about a sailing vessel sails/rudders/hull etc. Examine the effects of angle of
attack on sail lift and drag. See Fluent studies:





http://www.fluent.com/about/news/newsletters/97v6i1/a1.htm




http://www.fluent.com/solutions/marine/yacht_design.htm




http://www.fluent.com/about/news/newsletters/00v9i2/a2.htm


See CFX study




http://www.software.aeat.com/cfx/update/update21/u21_team_new_zealand.pdf




7.

Model the circulation inside the Fort Collins Edora Park EPIC ice rink due to ventilation and ice
surfac
e conditions. See Fluent News Vol. 9, Issue 2, Fall/Winter 2001.






http://www.fluent.com/about/news/newsletters/00v9i2/a14.htm



8.

Calculate the movement of moisture through a baby diaper. See Fluent News, Vol. 9, Issue 1,
Spring/Summer 2000. See:




http://www.fluent.com/////about/news/newsletters//00v9i1/a1
5.htm


9.

Evaluate the behavior of a combined sewer overflow system. See Fluent News, Vol. 7, Issue 1,
Spring 1998, and:




http://www.fluent.com/solutions/articles/ja141.pdf




http://www.fluent.com/solutions/articles/ja140.pdf



10.

Consider the behavior of a water flow splitter used in waste treatment plants: See a
rticle in Fluent
News, Vol. 9, Issue 2, Fall/Winter 2001.




http:
//www.fluent.com/about/news/newsletters/00v9i2/a7.htm



11.

Consider erosion on the face of a blade vane as a result of particle impaction in a dusty
environment. For a similar study in a pipe see Fluent and CFX studies::




http://www.software.aeat.c
om/cfx/cases/detail.asp?id=29



http://learningcfd.com/login/fluent/intermediate/tutorials/erosion/erosion.htm


12.

Consider the heat transfer within an automobile headlamp. Predict the temperature distribution in
an automotive headlamp using the Fluent
radiation model. See Fluent News, Vol. 7, Issue 1, Spring
, 1998, and web site at




http://www.learningCFD.com/login/fluent/auto/tut5.pdf


13.

Consider an application related to biofluid mechanics. Model the airflow into
the nose, out of the
mouth, around a body clothed and unclothed, through the esophogas into the lungs, etc. See article
in Fluent News, Vol. 9, Issue 2, Fall/Winter 2001 and:




http://www.fluent.com/solutions/biomedical/applications.htm



14.

Cook a hamburger. What are the heat and mass transfer characteristics

of a cooking hamburger on
a grill?




http://www.fluent.co
m//////solutions/brochures/food_bev00.pdf



15.

Consider the effects of cavitation within valves, a nozzle, an orifice, etc. See Fluent News,




http://www.fluent.com/////about/news/newsletters//01v10i2/a1.htm


16.

Consider a river rehabilitation study. See CFX article:




http://www.software.aeat.com/cfx/cases/detail.asp?id=35