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Ramping Intialization Patch Pressure

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Old   August 19, 2016, 21:18
Default Ramping Intialization Patch Pressure
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Igor K
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Hi all,

I am transient simulating a 2-D axisymmetric CD nozzle with an inlet and discharge box on either side of the nozzle (to be able to see the fluid jet propagating through the nozzle and exiting).

Currently, I am initializing the simulation from outlet pressure conditions of 10 Pa and then patching the inlet box with 50 kPa.

Simulations run relatively well and convergence is observed, however, I was wondering if anybody here has written a UDF to ramp the patch pressure from outlet conditions up to 50 kPa to reduce the gradient and minimize rarified gas dynamic effects.

Thank you.
ikrash is offline   Reply With Quote


initialization, patch, ramping

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