Freeze some cell in solving the equations

liuzhw · November 9, 2005, 21:58

hello everyone:

I tried solving shallow water equation with Foam, so I have to deal with the problem of wetting/dring problem. when the cell is not submerged by water, the velocity of cells will be set zero. my question is how to set the value of these cells in solving the momentum equations.

hjasak · November 9, 2005, 22:45

Have a look at the constraint class - this allows you to fix the solution in selected cells. However, I am not sure this is exactly what you want to do: a rethink of the algorithm or equations may be a better way.

Enjoy,

Hrv

November 9, 2005, 21:58	hello everyone: I tried sol	#1
liuzhw New Member Liu Zhaowei Join Date: Mar 2009 Posts: 9 Rep Power: 17	hello everyone: I tried solving shallow water equation with Foam, so I have to deal with the problem of wetting/dring problem. when the cell is not submerged by water, the velocity of cells will be set zero. my question is how to set the value of these cells in solving the momentum equations.

November 9, 2005, 22:45	Have a look at the constraint	#2
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,907 Rep Power: 33	Have a look at the constraint class - this allows you to fix the solution in selected cells. However, I am not sure this is exactly what you want to do: a rethink of the algorithm or equations may be a better way. Enjoy, Hrv __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

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