Fluids

Fluids

Dynamic mesh movement determined by mass inflow/outflow

    • bv169
      Subscriber

      Hello,

      I am curious about the best way to implement a dynamic mesh movement on a boundary (wall) that moves up as mass flows into the domain and down as it flows out, essentially conservation of mass. I considered using expressions, but it doesn't seem that expressions are compatible with dynamic mesh motion? I am guessing I will have to write a UDF. Is there a direct way to call mass inflow/outflow at boundaries in UDFs? 

      Thanks,

      Breanna 

    • Rob
      Ansys Employee

      You can, but does the motion depend on the flow rates or pressure on the moving wall? You'll want layering for the moving mesh part, and (potentially) to use the 6DOF solver to control it. You'll want to start reading the UDF manual. 

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