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Simple Acoustic

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Hello,

I am trying to model a 2D acoustic time harmonic square (10x10[m]; left bottom corner at (0,0)).
At the top the pressure is 101325[Pa] and now I just wanted to get started with the gravity force as a kind of a load, but how can I implementate it to get a continous rise of the pressure?

The 2nd step should be to create a point-source which is located at (0,0). But this is as well unknown for me yet.

Thanks for any hints on this.
Nikolaus

1 Reply Last Post 15 mai 2012, 06:49 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 15 mai 2012, 06:49 UTC−4
Hi

cant you load the system with a stationary solver case (before your time harmonic) and add a body force
Fz = -g_const*rho
And use the results of the stationary case as initial condition for the time harmonic ?

As I do not have Acoustic module I do not know if the bnody load is already in there, else you need to add a solid/structural physics, or find a coupled one

--
Good luck
Ivar
Hi cant you load the system with a stationary solver case (before your time harmonic) and add a body force Fz = -g_const*rho And use the results of the stationary case as initial condition for the time harmonic ? As I do not have Acoustic module I do not know if the bnody load is already in there, else you need to add a solid/structural physics, or find a coupled one -- Good luck Ivar

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