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Errors combining Laminar Flow - Module with equation based (PDE) heat transfer
Posted Oct 17, 2023, 5:50 a.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Equation-Based Modeling Version 6.0 0 Replies
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Hello reader,
I'm currently trying to recreate the equations of the heat transfer module by using a coefficient form PDE equation. The goal is the combination of the PDE with the existing module for laminar flow and achieve the same results as using the NITF-Multiphysics with heat and flow physics.
So at first I think it is necessary to assign the following terms of the coefficient PDE with the degree of freedom T (for temperature):
c = k(T) as known thermal conductivity
= rho(spf.pA, T) * Cp(T) * [u,v] * spf.dz due to fluid flow that uses the fluid module spf na dhas the respective velocitiy component u,vf = (d(spf.pA,t)+ud(spf.pA,x)+vd(spf.pA,y)) * spf.dz * alpha_p(spf.pA, T) T as a source term
The fluid is described by the "Air"-parameters included in the material library.
The problem is that running a simulation leads to a divergence that won't occur for the same model if I use the NITF-Multiphysics interface and the respective physics (fluid and heat transfer). I appended the mph-file so if you have any advice or ideas please share them.
Thanks in advance, Paul Löps.
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Hello Paul Löps
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