|February 10, 2012, 06:10||
Join Date: Jan 2012
Posts: 1Rep Power: 0
I am new to the CFD world and have a question regarding the translational periodicity in Ansys CFX and the way it is displayed in CFX-Pre. I hope my upcoming question is not answered in this forum yet, otherwise I apologize for not finding it.
At the moment I am doing a Grid Convergence Index-study where I want to identify the robustness of my grid. Therefore I created a fine and coarse derivative of my baseline grid. Both the coarse and baseline grid show a nice convergence in CFX-Solve but the residuals of the fine grid oscillate severely after 200 Iterations.
I assume the high resolution of the 'fine grid' takes transient effects into account which is the reason for the described convergence problems. Nevertheless I noticed something strange while looking at the translational periodicity. If you compare the pictures of the fine and baseline grid in CFX-Pre you recognize that the arrows that display the periodicity are not symmetric in the fine grid version! Is this something to worry about? Does anyone know the reason for this inaccurate display?
I attach a couple of pictures to this thread that should illustrate what I am talking about. Thank you very much in advance!
|February 10, 2012, 12:01||
Join Date: Mar 2009
Blog Entries: 6Rep Power: 45
You are getting good convergence with both meshes.
|Thread||Thread Starter||Forum||Replies||Last Post|
|[ICEM] ICEM periodicity specification||robboflea||ANSYS Meshing & Geometry||18||November 11, 2014 15:51|
|Periodicity lost during quater ogrid blocking||syler3321||ANSYS Meshing & Geometry||0||October 17, 2011 23:24|
|Translational Periodicity / Velocity Profile||sberez||CFX||1||November 15, 2009 18:29|
|Ensight 8.0 translational periodicity||Francesco||EnSight||0||May 16, 2006 19:40|
|translational periodicity||wasim||CFX||0||May 13, 2006 13:34|