# Calculate Force at different points in CFX Post

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 July 24, 2010, 12:47 Calculate Force at different points in CFX Post #1 New Member   Niraj Shah Join Date: Jul 2010 Posts: 6 Rep Power: 8 Hi, I am simulating a flow over an aeroplane wing. I want to find out the Aerodynamic forces at different points on the surface of the wing. When I use the force calculator Force_X it just gives me the total force on the 2d surface that is my wing. How do I find force at different points on this surface? Thanks.

 July 25, 2010, 06:21 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,535 Rep Power: 104 There is no force at a point. Only a pressure and shear stress, and resolved over a point it gives zero force.

 July 25, 2010, 11:11 #3 New Member   Niraj Shah Join Date: Jul 2010 Posts: 6 Rep Power: 8 So if I wish to find Aerodynamic forces at different nodes, I basically cant? Is it possible with FLuent or any other software?

 July 25, 2010, 18:36 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,535 Rep Power: 104 If Fluent can do the impossible then maybe fluent can do it. But seriously, you do not seem to understand what I am saying. Getting the force at a node is not physically meaningful. Only pressure and shear stress is meaningful. When pressure or shear stress is integrated over an area you then get a force.

 July 26, 2010, 12:16 #5 New Member   Niraj Shah Join Date: Jul 2010 Posts: 6 Rep Power: 8 Ohok I get it. So is there anything that I can calculate at nodes on a surface?

 July 26, 2010, 18:39 #6 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,535 Rep Power: 104 Pressure and/or shear stress would be a good start.

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