CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Y+ around a cylinder

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 4, 2017, 09:10
Exclamation Y+ around a cylinder
  #1
New Member
 
Zeinab
Join Date: Apr 2016
Posts: 9
Rep Power: 3
Zeinaby is on a distinguished road
Hi everyone

I'm trying to optimise the mesh in my Fluent model. That is a "flow past cylinder" model. I modelled a half block of the whole simulation domain with defining the symmetry boundary conditions.

I checked the Y+ contour after a transient simulation for the half block model. The solution converged very well (with K-W SST turbulence model). The Y+ contour image is attached. But I'm not sure how I should analyse that.

1- Is it Ok to have Y+ value out of accepted range (30<Y+<60) far from the walls?
2- Is it OK to have Y+ value equal to 0 at the pier wall and symmetry boundaries? If not, how I could increase the Y+ value at the cylinder wall where I need very fine mesh to solve the boundary layer?

Any help/advice is greatly appreciated.
Zeinab
Attached Images
File Type: png Wall Y+-half block.png (127.4 KB, 9 views)
File Type: png mesh.png (128.5 KB, 6 views)
Zeinaby is offline   Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flow past a 2D cylinder - High Re (1E+05) - Cd too high Pervispasco OpenFOAM Running, Solving & CFD 3 April 15, 2016 08:29
Drag force coefficient too high for a flow past a cylinder using komega sst Scabbard OpenFOAM Running, Solving & CFD 37 March 21, 2016 17:16
Forces Acting on a Rotating Cylinder (Moving Mesh) dreamchaser CFX 5 April 25, 2015 06:01
Incorrect Drag and Drag Coefficient for flow over a cylinder ozzythewise Main CFD Forum 8 June 13, 2012 06:24
Specifying boundary faces failes in blockMesh blaise OpenFOAM Meshing & Mesh Conversion 0 May 10, 2010 03:56


All times are GMT -4. The time now is 08:29.