Kaushik Shandilya
Open the model that you want to test grid refinement on. Go to the "Study" tab and select "Mesh." In the "Mesh" settings window, under "Advanced Parameters," select "Automatic" for the "Meshing Strategy." In the "Advanced Parameters" section, select "Mesh Refinement." In the "Mesh Refinement" window, select "Refine mesh globally" and set the number of maximum mesh elements. Click "Compute" to generate the mesh. Go to the "Results" tab and select the variable you want to investigate. Duplicate the study and adjust the mesh settings to refine the mesh. Compute the solution for each mesh refinement level and compare the results. Analyze the convergence of the solution as the mesh is refined. Use the convergence study to determine the appropriate mesh density for the desired level of accuracy.
Dear friend Md Raihanul Haque
To perform a grid refinement test in COMSOL Multiphysics, follow these steps:
Note that the exact steps may vary slightly depending on the version of COMSOL Multiphysics you are using.
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Pranjal Sarma
If you use the physics controlled automatic meshing, you may very the meshing from coarse element to ultra fine elements. You may check convergence and the error level in each refinement. depending on your requirement & criteria of selection, you can select the appropriate one.
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Mitali Basak
There is a nice video on grid independence study in comsol in YouTube. Have a look to the link: https://www.youtube.com/watch?v=HkuYA1PHc6k
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