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Diaphragm in Shock tube - Best BC

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Old   April 26, 2014, 18:52
Default Diaphragm in Shock tube - Best BC
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Hey guys,

I'm having a hard time trying to model a shock tube in Fluent, since I haven't figured out the best BC to model the diaphragm. I've been trying to model it as a mixing plane, where this plane is in between the driver and the driven (2D model), but no luck so far. I've seen some classes where the mixing plane is described as a BC only applicable to steady problems, which definitely is not the case. My geometry is kinda unusual (driver concentric with the driven), so, there's a lot of interest in seeing the development of the wave inside the driver.

Any suggestions?
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