<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear Paraview experts,</div><div><br></div><div>I completed a CFD calculations which contains, U (velocity field) and p (pressure field). <br>I used "extract selection" to select a cross section. I then would like to calculate the flow rate through this cross section, ie, U dot A. I tried to use the Calculator function. I saw U in the vector field. Is there a way to have A (area, vector field) so that I can do U dot A, then, integrate U dot A to have flow rate?</div><div><br></div><div>Thanks!</div><div><br>Pei-Ying<br></div></div></body></html>