|
[Sponsors] |
November 27, 2013, 10:09 |
Numerical diffusion in ccm and fluent
|
#1 |
Member
Join Date: Aug 2011
Posts: 89
Rep Power: 15 |
So I recently worked on a laminar mixing species transport problem in Star. I had done this problem in Fluent before and gotten good results, so I wanted to see how robust star's solver would be. It was a simply Y connection with two similar species. I noticed that, unless I had the mesh aligned with the flow, I got crazy amounts of numerical diffusion. The same problem in Fluent however was handled (similar mesh size and settings, also unstructured) just fine, with almost no noticeable numerical diffusion.
I have three questions: 1. Has anyone experienced this before? 2. Is this a sign that Star's solver might simply be weaker? 3. Does this mean that their solvers for all other equations might fall to the same weakness? I.e. should I be worried about momentum and turbulence models being too diffuse? |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Euler angles in fluent .... | bharath | FLUENT | 0 | March 25, 2013 20:25 |
Fluent Vs Star CCM | firda | Main CFD Forum | 3 | February 26, 2011 03:51 |
A genearl question on STAR CCM | nstar | STAR-CCM+ | 5 | June 24, 2009 10:39 |
OpenFOAM vs. Fluent & CFX | marco | Main CFD Forum | 81 | March 31, 2009 15:22 |