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Hello All

Posted September 18, 2016 at 15:43 by KTW310

Hi, my name is Keith Wilkins and I am a student at Temple University in Philadelphia, PA. I am studying Mechanical Engineering and just started taking a CFD course a few weeks ago. I graduate this upcoming December and expect to be continuing education in Fall 2017 for a masters, whether it will be in Mechanical or Electrical Engineering is yet to be decided.

So far CFD is very interesting and I am excited to learn more about it so I can use it for my senior design project. I am working...
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Old

Dual-Booting : win7 & linux-mint

Posted August 28, 2016 at 18:50 by kindle
Updated October 12, 2016 at 11:33 by kindle (clarity)

Installation from nothing : First win7 then linux-mint.
Win7 writes in MBR something to control boot and linux uses grub to control boot which will be able to boot windows.
Why not in the reverse order?
A complete re-installtion of win7 may over write ALL in MBR meaning the part that will call the actual grub configuration (in /boot or /etc/grub.d not sure...), therefore the repair of the linux booting is needed.
Result: grub boot first, if you choose "windows"...
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Old

Numerics in OpenFoam - PBiCG vs. PCG

Posted August 18, 2016 at 14:13 by kindle
Updated February 23, 2017 at 04:13 by kindle

So the numerical scheme (fvScheme) will affect the property of the matrix to invert and we should choose properly the solver/solving algorithm (fvSolution) in order to solve it properly. Depending on the form of matrix depended on structured or unstructured mesh something like that.

Quote:
Originally Posted by thg View Post
Hi Frog,

Meindert already mentioned, the difference between a PCG or a PBiCG,...
you can find in any textbook about linear iterative solvers like
Wessling, Saad, Trefethen, Stran,....
...
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Posted in Solver
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Old

Compile the solver laplacianFoam

Posted August 17, 2016 at 10:22 by kindle
Updated February 23, 2017 at 04:13 by kindle

laplcacianFoam is an implemented solver in OpenFOAM, which can be found in WM_PROJECT_DIR/platforms/.../bin (executable), .../application/solver/basic (dep) and WM_PROJECT_DIR/application/solver/basic (src).

Tried to compile from $FOAM_RUN, using laplacianFoam1. After comparing with authentic one, success.
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Posted in programming, Solver
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Old

Writing the last iteration for steady state simulations

Posted August 17, 2016 at 05:09 by Ramwi

Ok, I have a very bad memory and furthermore, I did not find the solution to the bellow described problem right away. So, I will use this place to store the solution for future use.

Note: The proposed approach might be overcomplicated. If it is so, please let me know what is the "proper way".

Problem description: You run a steady state simulation (e.g. simpleFOAM) and you control the endTime (number of iterations) via the residualControl. Thus, the number of iterations...
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Posted in Tips and tricks
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