Direction of force from the Surface integral

- February 13, 2020 at 10:44 pm
  
  Dilini
  Subscriber
  
  Hello,
  
  I am using the surface integrals from the results of Fluent to calculate the pressure force that is being caused by a liquid on my surface. My surface is curved. When I calculate it I get a value. (Attached)
  
  How can I know the direction of this resultant force? Is it normal to the surface? If so my surface is a curved body and hence how can I know from where it acts? What I need is the resultant force that is acting on the surface in y direction. (The lift)
  
  I would like to know what the direction of the force that Fluent calculates from this and how can I find the lift force by following the same procedure (Area integral of dynamic pressure)
  
  Thank you very much !!
- February 14, 2020 at 4:29 pm
  
  Rob
  Forum Moderator
  
  If you want the force use the Force Reports as they include a direction component. I think pressure is facet normal.
- February 14, 2020 at 4:41 pm
  
  Dilini
  Subscriber
  
  Thank you.
  
  I actually tried using the force report. But my iso clip which I extracted from an existing surface does not appear as a zone so that I cannot select it.
  
  I am attaching the image.
- February 17, 2020 at 11:35 am
  
  Rob
  Forum Moderator
  
  OK, options are to try and calculate (hard) or use the adaption tools to separate the mesh on the wall of interest.