Learning Forum

[Josch]

Hallo,

I want to simulate a pressure equalization. For an easy example of my problem, you can look at the picture below.

For t=0 the Chamber 1 has a pressure of 8bar and the chamber 2 a pressure of 1bar.

The Gas is Air and when the simulation starts at Timestep one, the Membrane collapse immediately. Afterwards

the pressure equalization starts.

It is a 3D-Simulation with a more difficult geometry as in the picture

 

My Problem: How can i build a Membrane which collaps immediatly ?

 

Thanks in advance,

Joscha

 

[Rob]

If the membrane can be assumed to fail instantly and with no effect on the flow just use an interior zone and read the section on Patch (Initialisation). 

[Josch]

Thank you for your help.

Now i want to simulate the pressure shock which occure in the system.

Do you think i have to use the density-based or the pressure-based solver?

The Fluid is air as ideal gas so it is compressible. 

 

Thank you in advanve

 

[Rob]

Pressure based is good to about 2-3Ma, much over that and density based may be better.