Ansys Learning Forum Forums Discuss Simulation Fluids non-physical negative uds concentrations with small diffusion coefficient Reply To: non-physical negative uds concentrations with small diffusion coefficient

grayg34
Subscriber

Here is a screenshot of where the negative concentration first appears. The values are small now but as the simulation continues to run the magnitude of negative concentration continues to increase and spread in volume. 

 

I am not sure what you mean by monitoring the scalar flux function?Â