Drag Coeffficient of a porous cylinder

- October 8, 2018 at 10:35 am
  
  mac_114
  Subscriber
  
  I have a flow problem across porous cylinder, i am unable to find drag force or coefficient, is there anyway to find drag of a non-wall surface in Ansys Fluent?
- October 8, 2018 at 10:44 am
  
  DrAmine
  Ansys Employee
  
  What is the kind of the surface you want to evaluate the force? Which components are your expecting to see here? Can you check CFD-Post and its force calculator?
- October 8, 2018 at 11:14 am
  
  mac_114
  Subscriber
  
  The surface is permeable (fluid-cylinder interface), the cylinder is porous.I am expecting the pressure and viscous components of drag coefficients on the cylinder but when i go to monitors/forces... i am not able to get the porous cylinder surface and unable to define monitor for drag.
  
  Regards
  
  Asif
- October 8, 2018 at 11:27 am
  
  DrAmine
  Ansys Employee
  
  The force monitor will just work for walls. As it is permeable the force is equal to the pressure force plus the mass flow force (due to the advection of momentum). You can have that directly in CFD-Post or by using some Custom Field Function or UDF.
- October 8, 2018 at 11:36 am
  
  mac_114
  Subscriber
  
  Thanks alot for your reply,i will try what you have told and get back to u Asap.
  
  Regards
  Asif

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