Fluids

Fluids

Drag Coeffficient of a porous cylinder

    • 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?

    • 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?

    • 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

    • 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.

    • 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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