How to make local refinement on particular part of a body?
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I want to simulate the aerodynamic drag of two high speed trains with different designs, but I got "Turbulent viscosity limited to viscosity ratio of 1.000000e+05 in xxx cells." throughout the step calculation in steady setup.
Q1. is this warning message really matter to the simulation?
I checked the turbulent viscosity contour and saw the following red part is having high viscosity ratio.
I deduce that finer meshes are needed to those red area shown in above contour. However, I only know local face sizing but not local 3D volume sizing of a part in one body (i.e. the yellow part below).
Q2. How to do the local 3D body mesh for local refinement on a particular part to resolve the viscosity ratio problem?
Q3. Is Inflation Meshing necessary for aerodynamic drag simulation? Do inflation layers near the domain important for the drag evaluation?
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">here to watch the video. Also, check out this course, which addresses all information regarding local sizing.
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