CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Mesh Refinement (http://www.cfd-online.com/Forums/fluent/117031-mesh-refinement.html)

Natali_Beginner April 30, 2013 20:02

Mesh Refinement
 
Hello guys,
I am wondering why I cannot reach to a stable and unchanged results when I am doing mesh refinement in many steps. Now, I refined the mesh almost 7 times smaller but th changes are huge compared with the last step.
Really thanks,
Natali

blackmask April 30, 2013 20:42

Do you use the first-order discretization? If so, please use second order discretization.

Natali_Beginner April 30, 2013 20:46

Quote:

Originally Posted by blackmask (Post 424309)
Do you use the first-order discretization? If so, please use second order discretization.

I am using 2nd order.

stuart23 May 1, 2013 02:30

How small is your mesh? You could be picking up transients in the flow. Maybe switch to the transient solver with a small timestep?

Far May 1, 2013 03:50

Quote:

Originally Posted by Natali_Beginner (Post 424303)
Hello guys,
I am wondering why I cannot reach to a stable and unchanged results when I am doing mesh refinement in many steps. Now, I refined the mesh almost 7 times smaller but th changes are huge compared with the last step.
Really thanks,
Natali

What was the size of initial mesh and refined mesh?

What type of flow you are analysing?


All times are GMT -4. The time now is 04:47.