oscillating valve flow

Matthias Finke

Hi everybody,

does anybody has experience with modelling transient valve flow at steady state boundary conditions.

I have read a report about the simulation of a counterbalance valve where a jet flipping (a phenomena like vortex shedding behind a cylinder) occurs and was identified as the cause of high frequency (5 kHz), pure tone sound.

With the informations from the report i scanned the geometry of the model (2d axisymm) and set up a simulation with a finte element comercial code, but in my simulation there is no transient behaviour of the flow.

Does anybody done something similar or knows something about transient valve flow at steady state boundary conditions ?

I would be grateful for any help and suggestions