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Why I get so different results?
Posted 19.10.2013, 02:33 GMT-4 0 Replies
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I am trying to solve a simple model with Comsol to find the Velocity magnitude of laminar air flow in cone ring channel. I set: inlet – Pressure, no viscous stress p0=1[atm] and outlet – Pressure p0=0.
I have two way to find the solution:
1. 3D space dimension, physics controlled mesh, finer element size, Number of degrees of freedom solved for: 206128. Maximum Velocity magnitude is 358.09 m/s.
2. 2D axisymmetric space dimension, physics controlled mesh, extremely fine element size, Number of degrees of freedom solved for: 40434. Maximum Velocity magnitude is 334.5 m/s.
Why I get so different results?
I am using a Stationary, Direct (Pardiso) solver.
Any comments or help is much appreciated.
Thanks in advance
Hello Lysak Ilya
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