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-   -   dam break problem (https://www.cfd-online.com/Forums/openfoam/74859-dam-break-problem.html)

tharem April 9, 2010 22:58

dam break issue
 
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.

holger_marschall April 12, 2010 04:27

Quote:

Originally Posted by tharem (Post 254034)
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,

tharem April 26, 2010 19:19

1 Attachment(s)
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.

tharem April 26, 2010 19:45

I can't upload the image because it exceeds the 97.7 KB.
Do you know what can i do?

forgive the inconvenience

atabak756 May 1, 2011 16:12

About dam break
 
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.

nimasam May 2, 2011 13:22

hi friend
look at :
tutorials/multiphase/interFoam/laminar/damBreak

atabak756 May 2, 2011 16:19

hi,
Thanks for your answer.
I could not find this file.is it possible for you to give me these files directly?

elvis May 3, 2011 02:36

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/

atabak756 May 3, 2011 08:48

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

nimasam May 3, 2011 09:01

hi friends
its blockMesh!
which is written for openFOAM use, however maybe this command, works for u
"foamToFluent"

Reynaldo_21 July 6, 2011 16:19

Quote:

Originally Posted by nimasam (Post 305978)
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

yasharif December 14, 2011 12:15

Any one worked with earthen dam break problem in ANSYS
 
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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