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boundary conditions for explosion in a tube

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Old   October 28, 2009, 13:36
Default boundary conditions for explosion in a tube
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Dennis Rown
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Hello!

I am simulating an explosion inside a tube. I can not figure out how to set the wall boundary conditions for the pressure p in the folder 0/p so that the wall pressure is calculated. Now I only can start simulation, when I set the wall boundaries for the walls to "fixedValue" and set that value to 1 bar. When I set them to "calculated", the simulation crashes in the first timestep. What am I doing wrong there?
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Old   October 29, 2009, 14:06
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Bjorn H. Hjertager
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The boundary condition for pressure for walls should be zeroGradient.
rgds
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