# [ICEM] J-Type grid

 Register Blogs Members List Search Today's Posts Mark Forums Read

 February 10, 2012, 16:40 J-Type topology,shifted and non shifted periodicity #1 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,329 Blog Entries: 6 Rep Power: 45 Hi Folks Previously I tried several times to create the J-type mesh for turbomachinery using ICEM. with no success. http://www.cfd-online.com/Forums/ans...ine-blade.html Finally I found a method to do so and wanted to share with you. Geometry is simple with leading edge type shape. Picture of final mesh Steps to create this topology(1-5): Last edited by Far; February 11, 2012 at 08:50. Reason: Title change

 February 10, 2012, 16:45 #2 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,329 Blog Entries: 6 Rep Power: 45 steps 6-9

 February 11, 2012, 08:42 Shifted periodic #3 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,329 Blog Entries: 6 Rep Power: 45 Use of shifted periodic to define the periodic boundary conditions Steps : 10-13

 February 11, 2012, 08:47 Nonconformal periodicity treatment #4 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,329 Blog Entries: 6 Rep Power: 45 Since latest version of Fluent has option for non conformal periodic boundary conditions. Therefore it is not always required to define the periodicity in ICEM and also there is no need to use the shifted periodic boundary condition. We shall create the non-conformal periodic boundary in Fluent. In ICEM define per1 and per2 as interface boundaries. PS : Fluent V 12 and ICEM V 12 are used for all this work steps 14-16

 February 14, 2012, 14:16 #5 Retired from CFD Online     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,665 Blog Entries: 1 Rep Power: 39 Why not just apply a CGrid or Quarter Ogrid on this... Maybe I am not understanding your goal, but I think you could have got all the hard part done in one quick top down procedure. Oh well. __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

 February 14, 2012, 15:36 #6 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,329 Blog Entries: 6 Rep Power: 45 I dont think that this is possible with quarter O-grid

 February 15, 2012, 15:17 #7 Retired from CFD Online     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,665 Blog Entries: 1 Rep Power: 39 The first 9 steps can be replaced by 2 simple splits, a quarter ogrid and one delete block. You will get to the same blocking, but the index will be much cleaner. I didn't understand what you were trying to accomplish with steps 10 thru 13... I guess this is a periodic model and you were trying to create a shifted periodic blocking? Just put a quarter Ogrid the other way, then apply periodic verts and be done. __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

 February 12, 2013, 05:12 #8 Senior Member   Join Date: Mar 2010 Location: Cape Town, SA Posts: 156 Rep Power: 10 hi FAR. thanks for your post - I think the Numeca mesher uses J-grids quite extensively. Just a quick question though, were you able to make conformal periodics with this mesh? I am trying to stay away from quarter o-grids since I often end up with a block of dense cells in the quarter o-grid and which then gives me mesh related issues with variables which are highly sensitive to mesh density! Again thanks for posting this - Best regards Jonathan

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post marine OpenFOAM 66 October 26, 2014 12:10 cwang5 OpenFOAM Bugs 23 April 13, 2011 15:37 claco OpenFOAM 7 April 20, 2010 04:32 Kart OpenFOAM Meshing & Mesh Conversion 1 February 4, 2010 05:38 kumar2 OpenFOAM Running, Solving & CFD 8 March 24, 2008 19:38

All times are GMT -4. The time now is 23:21.