In comsol multi-physics there are 3 parameters those affect the accuracy of solution and also time of computation.
1- study > time dependent >study setting > times > time step
we know this is important for accurate simulation.
but there are 2 other parameters i don't know what is the definition of them, and where is their impact on.
2- study (time dependent) > study setting > tolerance (manual) > relative tolerance
3- study> solver config > solution > dependent variables > displacement field > scaling (manual) > scale.
especially the last one is so important in smoothness of result graph.
but in fluid-structure may be increase computation time dramatically.
if you know answer please inform me.
thnks
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