Simulating Flow in Orifice-Distance from inlet and outlet

[RKD89]

Hi Guys

I am trying to simulate flow in an orifice plate

I want to know what should be the distance between orifice and the inlet and outlet.

I have checked few ISO files , only problem is they have values for practical conditions , such as minimum distance between orifice and expander/valve/bends etc

I have found some values from different papers such as inlet should be 4 times diameter , outlet should be 23 times diameter etc etc but there is no proper reasoning behind it.

Can anyone point me the right direction ?

Also ,K-epsilon model is most widely used , but it seems RSM models give a better result

Any comments on that ?

Thanks

 

[Navin A S]

in advance.The distance between the orifice plate and the inlet and outlet depends on the specific conditions of your flow. Generally, the recommended distance is 2-5 times the diameter of the orifice plate. This will ensure that the flow is well established at the orifice plate before it enters the plate and reduce turbulence at the plate itself. For RSM models, they can provide more accurate results than K-Epsilon models, but the computational cost is much higher.