How can I calculate the drop in pressure across an orifice?

[Yasasvi]

I know the inlet pressure, temperature and density along with the massflow rate across the orifice and the orifice cross section. Is there a way for me to calculate the drop in pressure across the orifice?

 

[stockzahn]

You could use empirical values like e.g. you find here: http://www.roymech.co.uk/Related/Fluids/Fluids_Pipe.html. Another possibility is to perform a numerical simulation, but of course that takes time.

 

[jrmichler]

Yes. The Wikipedia article is a good summary of orifice calculations: https://en.wikipedia.org/wiki/Orifice_plate. The ASME book on fluid meters has a more complete treatment.

And welcome to PF.

 

[russ_watters]

I know the inlet pressure, temperature and density along with the massflow rate across the orifice and the orifice cross section. Is there a way for me to calculate the drop in pressure across the orifice?

Google: "orifice coefficient"
https://neutrium.net/fluid_flow/discharge-coefficient-for-nozzles-and-orifices/
https://www.engineeringtoolbox.com/orifice-nozzle-venturi-d_590.html