Fluent Iteration Too SLow

- May 3, 2020 at 10:18 am
  
  Sherif
  Subscriber
  
  Hi,
  
  I did 2D simulation on Ansys Fluent. iterating was very smooth and one iteration takes ~1sec as the mesh has 80 thousands elements.
  I did the same model but 3D I got 6 Million elements and one iteration takes ~15 minutes. is that normal ?
  I have Intel Core i5 with 8 Gb Ram. Using parallel processing with 4 cores and single precision instead.
  The model is a simple supersonic flow over rocket nozzle.
  Any ideas? Is that normal?
- May 4, 2020 at 1:07 pm
  
  Kalyan Goparaju
  Ansys Employee
  
  Hello,
  
  1 iteration for 15 minutes sounds too slow. Can you try a couple less denser meshes (3mil and 1 mil perhaps) and see if the time per iteration reduces?
  
  Thanks,
  
  Kalyan
- May 4, 2020 at 1:44 pm
  
  DrAmine
  Ansys Employee
  
  Depends on which resources are you running but very slow.