Transient Simulation for pipe flow
I used the uniform axial velocity at inlet & zero relative static pressure at outlet for my steady flow simulation (I'm using CFX5.7 now).
I now wish to simulate the transient pipe flow when the valve suddenly close at the inlet (valve is not included in the flow domain). Would it be possible to impose a step change of static pressure (rather than velocity) at the inlet as the boundary condition?
I want the inlet velocity to be part of the solution but learnt from user manual that static pressure at inlet is a very unreliable boundary condition. Any suggestion how to model this condition, please?
Thanks a lot, Sam.
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