Bernoulli's equation along the streamline that begins far upstream of the tube and comes to rest in the mouth of the Pitot tube shows the Pitot tube measures the stagnation pressure in the flow.

With Equations 1 and 6 taken into account, integration of Equation 8 yields Equation 9. 6 7 Thus for given values of downhole pressure and vertical depth, engineers can estimate the brine ...

More information: Jai-Yeop Lee, Derivation of full range vapor pressure equation from an arbitrary point, Chemical Engineering Communications (2024). DOI: 10.1080/00986445.2024.2409171.