I have attached two diagrams, one is for an extra-fine mesh and the other is for an extremely fine mesh. I am using PZT-4D and my suspended particles are polystyrene particles in water.
The resonant frequency for PZT-4D in the extra-fine mesh is 1.7 MHz while the resonant frequency for PZT-4D in the extremely fine mesh is 2 MHz. Why is that?
The diagram that shows a perfect standing wave field is the one that has an extremely fine mesh. The other that doesn't have a perfect standing wave is the one that has an extra fine mesh.
It is relevant to keep constant the relationship between the acoustic wavelength of both frequencies and the ratio of the mesh sizes selected for them, that should be equal
1.7/2=size1/size2=0.85
Take into account the approaches of the algorithms included in the COMSOL software to solve the H-A equations.
Mesh introduces dispersion of the phase speed, i.e. makes it dependent on the wavelength to the mesh size ratio. This affects the resonance condition. So, as Icíar González has pointed out, it is better to keep this ratio the same
I am looking forward to create a simple comsol module for ultrasonic piezoelectric transducer over a water and find the pressure profile of it, any help??
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