Fluids

Fluids

Topics relate to Fluent, CFX, Turbogrid and more

Negative K Value in xxx cells

    • Agung Limowa
      Subscriber

      Hi, i have a problem with my model it iterates a few times and show divergence and residual spike, how i overcome this?, i am modelling a duct and a tunnel but after 100 iteration what happened is the floating point exception and show message negative K in xxx cells how i can handled this

    • SRP
      Ansys Employee

      Hi,

      It is mostly due to bad convergence, or bad mesh, or both. It also occurs when a user adds a negative source term to the "k" equation. 

      Thank you.

    • Agung Limowa
      Subscriber

      how can i can overcome this ?

       

    • Rob
      Forum Moderator

      Check the mesh quality: note that's cell metrics (in Meshing) and resolution (Meshing or the Fluent solver). You'll need to look at and then judge the latter. 

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