Negative K Value in xxx cells

- June 25, 2023 at 6:09 am
  
  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
- June 26, 2023 at 7:54 am
  
  Saurabh R Patil
  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.
- June 26, 2023 at 8:28 am
  
  Agung Limowa
  Subscriber
  
  how can i can overcome this ?
- June 26, 2023 at 10:35 am
  
  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.