NS with FE not converging #29004
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adigc
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Q&A Modules: Navier-Stokes
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Hello Adding a turbulence model will facilitate convergence.
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Question
I am having difficulties with convergence of a 3D CFD simulation with INSAD at higher Reynolds Number.
I am providing the input I am using below.
NOTE: The mesh contains only linear tetra elements.
With the above settings, that is with
inlet_velocity = 1
mu = 1
rho = 1
Reynolds number = ~60
the simulation takes 8 nonlinear iterations to converge. Everything is fine. But as soon as I increase the inlet velocity to 10 (Reynolds number = 600) the simulation takes forever to converge.
Any hints what I am missing would be helpful.
Thanks in advance.
Additional information
Mesh size and type: 250K nodes, 4 noded linear tet elements.
Reynolds number: Target Reynolds number is around ~4000
Discretization (finite element CG/DG, finite volume, etc): Finite element CG
Models (turbulence, porous media, etc): Not including any turbulence models.
Solver method (fully coupled, segregated, multiapps, etc): fully coupled (input provided.)
Base input you started from:
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