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-   -   Forced convection and CHT : can we disable pressure and velocity solvers ? (http://www.cfd-online.com/Forums/main/99483-forced-convection-cht-can-we-disable-pressure-velocity-solvers.html)

M3hdi April 4, 2012 10:09

Forced convection and CHT : can we disable pressure and velocity solvers ?
 
Hi everybody,

I would like to simulate a Conjugate Heat Transfer problem where the fluid properties (density and viscosity) are independent of temperature. It is a forced convection case. Suppose I already get the pressure and velocity fields through a steady state simulation in the fluid region.

The question is: can I run a CHT simulation (with time varying T boundary conditions) where p and U are initialized by the steady state solution and only energy equations are solved (in the fluid and solid regions with heat transfer). I can do so by setting the target residue of the pressure and velocity equations to 1.

Is this correct ? This proceedure could save a lot of CPU time :)

Thank u for your help.
M3hdi

M3hdi April 5, 2012 10:27

..the underlying hypothesis would be that the temperature field does not change the pressure and velocity solutions. Is this correct in a physical point of view ? (for incompressible fluid with constant density and viscosity)

:confused:

M3hdi May 31, 2012 05:42

... none ?

JBeilke May 31, 2012 09:04

That's a usual way to deal with that problem. So try it and look if you get reasonable results.

M3hdi May 31, 2012 09:57

Thank you for the answer !

:)


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