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Problem of mesh size
Posted Mar 16, 2022, 5:50 a.m. EDT Structural & Acoustics, Acoustics & Vibrations Version 5.3a 2 Replies
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Since I have to simulate the Sound Pressure Level and Impedance from 100 Hz to 20 kHz, the mesh size at 20 kHz must be extremely fine (maximum size of mesh is 3.43 mm). Can I change the wave speed to meet the fix mesh size instead of change the mesh size to meet the fix wave speed?
I tried a trial model to set the wave speed of air is as follow: if(f0<4750[Hz],343[m/s],343[m/s]*4) and the max. mesh size is as follow: if(f0<4750[Hz],343[m/s]/f0/5,12[mm]) where f0 is /12 octave from 100 Hz to 20kHz.
But the SPL seem to have a deep at 4750 Hz, however the impedance curve didn't change.
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The speed of sound (if that is what you mean) should not be changed. It is independent of whatever problem you are trying to solve.
-------------------René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
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OK, I'll try another way, thank you very much.