How should I choose maximum mesh size for thin elements?
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I am currently using PDE toolbox to simulate heat transfer of a body consisting many thin layers (magnitude of 1-e6 m). Whenever the amount of thin layers is high, the ODEsolver (ode15s) runs into singularity. By mesh generation I use
generateMesh(thermalmodel, 'Hmax', '0.001')
and when I reduced the Hmax to 0.01 I can simulate more layers. My question is, what is the criteria to best choose my Hmax value?
Also when I change the thickness of my thin layers, say, thicker, the ode solver runs into singularity faster. What factors determine the solution of my ode solver?
Thank you.
回答（1 个）
Ravi Kumar
2018-4-24
0 个投票
Your setup seems to be resulting in an ill-conditioned system of equations. Hard to tell without seeing the actual setup. Contact support with reproduction code to see if there are any workaround.
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2018-4-24
2018-4-24
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