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Solving coefficient form of PDE and laminar flow for a heat transfer problem
Posted 08.04.2019, 01:31 GMT-4 0 Replies
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Hi everyone,
I am trying to solve a multiphysics problem in a complicated 3D domain of fluid and and solid medium. Governing equations, solved for are Continuty, Momentum and a Modified Energy equation. Physics that I am using in COMSOL are Fluid flow and Coefficient form PDE. I am using Fully coupled direct linear time dependent solver. Degrees of freedom solved for=1758657, total mesh number of elements=1200134, avg element quality=.7399, min element qualiyy=1.02e-5
During simulation, after 0 time step, its showing "Inconsistent unidirectional constraints found. 1860 constraint force columns are merged/removed." And the solver is taking too long time to solve the problem. It takes 4 days already for just 20 sec study out of 650 sec in my model. I am using double processor(XEON) workstation with 64 gb RAM. 1758657
Can anyone help me in this, to know the reason behind it and how to reduce the solution time.
Hello Abhijit Paul
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