Dear all,
I am analysing the waves induced inside a thin layer using a shaker. I apply a sine wave on one of the edges and the analysis is in the time-domain. I am using Comsol v4.0.
Altough I am using the right time step and the right maximum element size (compared to the frequency of the applied vibration), I can't see the sine wave propagating inside the medium. For example, if I apply a burst of 5 cycles, I can't see this 5 cycles. It seems that it doesn't sample the load in the right manner, even if I use a time step that corresponds to 20 samples in each period.
Could it be a problem of solver? I am using a linear time.dependent solver.
If I increase the thickness of the layer, the simulation works well with thick layer. Does it depend on the different circular frequencies? Should I calculate the time step and the maximum element size considering these frequencies and not the frequency of the applied load?
Many thanks.
Ramona
I am analysing the waves induced inside a thin layer using a shaker. I apply a sine wave on one of the edges and the analysis is in the time-domain. I am using Comsol v4.0.
Altough I am using the right time step and the right maximum element size (compared to the frequency of the applied vibration), I can't see the sine wave propagating inside the medium. For example, if I apply a burst of 5 cycles, I can't see this 5 cycles. It seems that it doesn't sample the load in the right manner, even if I use a time step that corresponds to 20 samples in each period.
Could it be a problem of solver? I am using a linear time.dependent solver.
If I increase the thickness of the layer, the simulation works well with thick layer. Does it depend on the different circular frequencies? Should I calculate the time step and the maximum element size considering these frequencies and not the frequency of the applied load?
Many thanks.
Ramona