Problem Encountered inLid Driven Cavity in Finite Volume Method with SIMPLE Algorithm

Abdels83 · July 3, 2015, 19:47

I have written my code in MATLAB and I need help from the forum on where things could be going wrong, my streamline plot appears not to be properly predicted and I am also not getting vortices on the corners of the cavity.

Please find code attached.

Please any help with code modification will be appreciated.

Thank you.

FMDenaro · July 4, 2015, 07:55

your M-file did not run, you have some errors to correct (Lx is not defined when used, normres is not defined, etc)

Abdels83 · July 4, 2015, 10:46

Quote:

Originally Posted by FMDenaro

your M-file did not run, you have some errors to correct (Lx is not defined when used, normres is not defined, etc)

Thank you Filippo, I have corrected the error and the code is now running. I also attached the streamline plot for Reynolds number of 100.

Many Thanks.

FMDenaro · July 4, 2015, 12:17

if you are using primitive variables you must debug your solution (u,v,p).
The streamlines are just a post-processing that can be affected by some factors.
However, the figure you attached shows a quite regular pattern for Re=100.

Use a fine grid (for example 100x100) to ensure Re_h =1 and check the velocity profiles (Ghia&Ghia paper).

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July 4, 2015, 07:55		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,897 Rep Power: 73	your M-file did not run, you have some errors to correct (Lx is not defined when used, normres is not defined, etc)

July 4, 2015, 12:17		#4
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,897 Rep Power: 73	if you are using primitive variables you must debug your solution (u,v,p). The streamlines are just a post-processing that can be affected by some factors. However, the figure you attached shows a quite regular pattern for Re=100. Use a fine grid (for example 100x100) to ensure Re_h =1 and check the velocity profiles (Ghia&Ghia paper).