Is Pressure Drop Measured at Pipe Centreline or Averaged Over Surface?

[James H]

Hello,

I am calculating pressure drop through a pipe using CFD, which will be validated with hand calculations and experiments for a project. When I take results from my software, I can either take the pressure at a specific point (assume the centreline of the pipe) or I can take an average pressure of the pipe cross section.

When we measure pressure drop experimentally or using calculations, is this usually a specific value in the pipe centreline, or as an average over the surface?

Thanks.

 

[Asymptotic]

Hello,

I am calculating pressure drop through a pipe using CFD, which will be validated with hand calculations and experiments for a project. When I take results from my software, I can either take the pressure at a specific point (assume the centreline of the pipe) or I can take an average pressure of the pipe cross section.

When we measure pressure drop experimentally or using calculations, is this usually a specific value in the pipe centreline, or as an average over the surface?

Thanks.

If a pitot tube is used to measure pressure it will be situated in the pipe centerline.