[ICEM] ICEM CFD Cooling Hole Hybrid Mesh

RealENG22 · November 22, 2013, 16:41

I am currently trying to mesh some geometry, the geometry is pretty simple - it consists of a single effusion cooling hole, fed by a coolant inlet. The hole exits into a mainstrain cross flow.

I have been advised to use an octree volume mesh initially, and then smooth.

Then change the mesh to delauney to ensure a better transition is achieved, and smooth again.

I then need to add around 15 layers of prisms around the wall and hole.

Has anyone got any good guide to this method? I will also need to ensure a fine mesh close to the hole and achieve a y+ < 1 which I will obviously need to work on.

My main concern is knowing how to setup the mesh to be dense in the areas necessary?

Thanks

Far · November 22, 2013, 23:27

http://www.cfd-online.com/Forums/ans...efinement.html

You can follow these general guidelines:

1. Make the octree mesh : for this you must specify the part mesh size/surface mesh size, set global parameters specially the curvature and proximity if needed.

2. Delete volume mesh and smooth surface mesh

3. generate delaunay mesh

4. set prism parameters. Do not specify the initial height and total height. number of layers should be maximum 3 (do not go for 1 layer as it will loose the advantage). Now compute prism mesh and go to edit mesh tab. Here you will use commands. One is splitting the layers to required number of layers i.e 15 in your case and then use redistribute command to make it consistent.

You can also use the density box to get finer mesh in critical area. Also in some post siw has discussed the above method in more detail along with smoothing of mesh including prism mesh.

November 22, 2013, 16:41	ICEM CFD Cooling Hole Hybrid Mesh	#1
RealENG22 Member Steve Mcharg Join Date: Mar 2013 Posts: 31 Rep Power: 13	I am currently trying to mesh some geometry, the geometry is pretty simple - it consists of a single effusion cooling hole, fed by a coolant inlet. The hole exits into a mainstrain cross flow. I have been advised to use an octree volume mesh initially, and then smooth. Then change the mesh to delauney to ensure a better transition is achieved, and smooth again. I then need to add around 15 layers of prisms around the wall and hole. Has anyone got any good guide to this method? I will also need to ensure a fine mesh close to the hole and achieve a y+ < 1 which I will obviously need to work on. My main concern is knowing how to setup the mesh to be dense in the areas necessary? Thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Export mesh from ICEM CFD for Fluent	summerdream	ANSYS	2	September 10, 2013 13:12
Loading previously saved mesh in ICEM CFD	user0314	ANSYS Meshing & Geometry	1	September 20, 2011 13:46
[ICEM] Problem with volume mesh in ICEM CFD	kolapoasafa	ANSYS Meshing & Geometry	2	September 16, 2011 04:54
fluent add additional zones for the mesh file	SSL	FLUENT	2	January 26, 2008 12:55
importing mesh from ICEM CFD into CFX 5	Jay	CFX	2	November 12, 2002 14:46

November 22, 2013, 23:27		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	http://www.cfd-online.com/Forums/ans...efinement.html You can follow these general guidelines: 1. Make the octree mesh : for this you must specify the part mesh size/surface mesh size, set global parameters specially the curvature and proximity if needed. 2. Delete volume mesh and smooth surface mesh 3. generate delaunay mesh 4. set prism parameters. Do not specify the initial height and total height. number of layers should be maximum 3 (do not go for 1 layer as it will loose the advantage). Now compute prism mesh and go to edit mesh tab. Here you will use commands. One is splitting the layers to required number of layers i.e 15 in your case and then use redistribute command to make it consistent. You can also use the density box to get finer mesh in critical area. Also in some post siw has discussed the above method in more detail along with smoothing of mesh including prism mesh.