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Extremely long calculation time for a temporal study of thermal expansion
Posted Feb 5, 2024, 7:44 a.m. EST 1 Reply
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Hello ,
I'm a new user of comsol and i want to simulate the thermal expansion of an optical grating induced by the heat of a laser.
The problem that i encounter is that the time of calculation is extremely long. Indeed i lauched a simulation with 45 cpu and in 24 hours the simulation only made it to 95 seconds. Furthermore when i launch the simulation with only the heat flux module the calculation time is very fast on the order of a few seconds.
So i would like to know if i'm doing something wrong or if it is expected for this kind of study to requiere a long time of calculation.
You will find attach the mph file. Thank you in advance for your time
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The solid is unconstrained, so the problem is singular. The solver will iterate for ever trying to find the non-unique solution.
-------------------Henrik Sönnerlind
COMSOL