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Old   April 9, 2010, 22:58
Exclamation dam break issue
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Tharek Mohtar
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Hello.
I've been trying to validate the interFoam solver and i had some problems with the dam break tutorial. I noticed the following error:

The level of the free surface begins to fall before the fluid's wavefront reach the wall that is in contact with it.

I found some papers with experimental solutions of this case and the solutions given are quite different.

I've not made modifications on the tutorial, and if it is a demonstration of the openFOAM capacity i don't understand why this error.

If anybody else has noticed this please reply!

Thanks!

P.S: sorry for my English.

Last edited by tharem; April 9, 2010 at 23:22.
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Old   April 12, 2010, 04:27
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Holger Marschall
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Quote:
Originally Posted by tharem View Post
I've been trying to validate the interFoam solver and i had some problems with the dam break tutorial. I noticed the following error:

The level of the free surface begins to fall before the fluid's wavefront reach the wall that is in contact with it.

I found some papers with experimental solutions of this case and the solutions given are quite different.
Hi,

which reference do you refer to? The dambreak tutorial is based upon experiments by Koshizuka in 1995:
Koshizuka S, Tamako H, Oka Y. A particle method for incompressible viscous flow with fluid fragmentation.
Computational Fluid Mechanics Journal 1995; 113:134 147.
For nice highspeed pictures have a look at
Deborah M. Greaves, Simulation of viscous water column collapse using adapting hierarchical grids.
Int. J. Numer. Meth. Fluids 2006; 50:693711
Could you sketch the expected behavior and the one simulated in a illustrative drawing?

best,
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Old   April 26, 2010, 19:19
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Tharek Mohtar
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Hi, Forgive me for not replying earlier. Well, my reference is the following:

By J. S. Wang, H. G. Ni, and Y. S. He. FINITE-DIFFERENCE TVD SCHEME FOR COMPUTATION OF DAM-BREAK PROBLEMS.
Journal of Hydraulic Engineering, Vol. 126, No. 4, April, 2000.

Here a figure extracted from the paper above named:



The level of the water column (10 meters) is not decreasing until the wavefront reaches the left side of the column, namely, the wall that is in contact with the column of fluid.
Attached Files
File Type: pdf paper.pdf (13.2 KB, 141 views)

Last edited by tharem; April 29, 2010 at 21:54.
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Old   April 26, 2010, 19:45
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Tharek Mohtar
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I can't upload the image because it exceeds the 97.7 KB.
Do you know what can i do?

forgive the inconvenience
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Old   May 1, 2011, 16:12
Default About dam break
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Atabak
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Hello,

Do somebody have dam break tutorial input mesh and data files.
I have seen the file with name of "dambreak.msh.gz" in tutorial however i can not find this input file in the web site.I appreciate if somebody send me mentioned file and Fluent case about it.

Thank you.
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Old   May 2, 2011, 13:22
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Nima Sam
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hi friend
look at :
tutorials/multiphase/interFoam/laminar/damBreak
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Old   May 2, 2011, 16:19
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hi,
Thanks for your answer.
I could not find this file.is it possible for you to give me these files directly?
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Old   May 3, 2011, 02:36
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http://repo.or.cz/w/OpenFOAM-1.7.x.g...minar/damBreak

http://repo.or.cz/w/OpenFOAM-1.6.x.g...minar/damBreak

http://openfoam-extend.svn.sourcefor...inar/damBreak/

http://openfoam-extend.svn.sourcefor...Foam/damBreak/
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Old   May 3, 2011, 08:48
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Thank you for your answer.
I looked at the web site you sent me however i don't understand how can i use these sites because there is no Gambit file and Fluent case and data file.
i would appreciate if you send me the file that working in Gambit and fluent software.

Thanks again for your help
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Old   May 3, 2011, 09:01
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Nima Sam
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hi friends
its blockMesh!
which is written for openFOAM use, however maybe this command, works for u
"foamToFluent"
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Old   July 6, 2011, 16:19
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Quote:
Originally Posted by nimasam View Post
hi friend
look at :
tutorials/multiphase/interFoam/laminar/damBreak
Hello. I am Mexican and I need this file dambreak.msh.gz could send it to me to my e-mail reynaldoag85@hotmai.com. Thank you for your help
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Old   December 14, 2011, 12:15
Default Any one worked with earthen dam break problem in ANSYS
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yasharif
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Dear friends
Did any1 work with earthen dambreak problem in ANSYS fluent?
how to configure the earth part as solid or particle(because it is soil)?
Thnx in advance.
Sharif
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