MapFields

cpplabs · February 13, 2008, 16:01

Hi,
I need to solve a non-Newtonian flow problem and would like to use a Newtonian solution as the initial guess. Do I have to run the application separately and use mapFields to map the first solution onto the second? The mesh is the same, is it possible to put the two together in one application?
Any information about this is greatly appreciated.

cpplabs · February 14, 2008, 19:05

Hi,
Found a simple solution: because what I am interested in is steady flow only, I can run the solver with Newtonian model in the first several time steps, then switch back to the non-Newtonian model I want to use. The convergence is much faster.
Thanks.

stephan · February 17, 2008, 06:07

hi,

this paper helped me a lot, so maybe it's nice for you too?!:
Issa, "Solution of the implitly Discretised fluid flow equation by operator splittiing" in J. of Comp. Phys. No. 62, 1985, S. 40-65
there is another one about bouyant flow which might be interesting too..
br
stephan

stephan · February 17, 2008, 06:08

hi,

sorry this was the wrong thread

stephan

February 13, 2008, 16:01	Hi, I need to solve a non-	#1
cpplabs New Member J. T. Join Date: Mar 2009 Posts: 12 Rep Power: 17	Hi, I need to solve a non-Newtonian flow problem and would like to use a Newtonian solution as the initial guess. Do I have to run the application separately and use mapFields to map the first solution onto the second? The mesh is the same, is it possible to put the two together in one application? Any information about this is greatly appreciated.

February 14, 2008, 19:05	Hi, Found a simple solutio	#2
cpplabs New Member J. T. Join Date: Mar 2009 Posts: 12 Rep Power: 17	Hi, Found a simple solution: because what I am interested in is steady flow only, I can run the solver with Newtonian model in the first several time steps, then switch back to the non-Newtonian model I want to use. The convergence is much faster. Thanks.

February 17, 2008, 06:07	hi, this paper helped me a	#3
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 17	hi, this paper helped me a lot, so maybe it's nice for you too?!: Issa, "Solution of the implitly Discretised fluid flow equation by operator splittiing" in J. of Comp. Phys. No. 62, 1985, S. 40-65 there is another one about bouyant flow which might be interesting too.. br stephan

February 17, 2008, 06:08	hi, sorry this was the wron	#4
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 17	hi, sorry this was the wrong thread stephan

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