CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Difference of Wall Heat Transfer Coefficient on different meshes (tetra vs. hexa)

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

LinkBack Thread Tools Search this Thread Display Modes
Old   October 24, 2017, 01:56
Default Difference of Wall Heat Transfer Coefficient on different meshes (tetra vs. hexa)
New Member
Join Date: Oct 2015
Posts: 13
Rep Power: 9
AntonZ is on a distinguished road
Good day everybody.

I had to calculate a Wall Heat Transfer Coefficient (WHTC) on the surface (hub) between red lines.
I did meshing in ANSYS Turbogrid for a 120 degree sector. So I get hexa-mesh with y+=50 at max (right before the fan).

My colleague did mesh for the full circle in ANSYS Meshing with tetras.

We both did calculation in CFX for the same regime (T, Pin, Pout, rotation speed, mass flow etc)
The problem is - we get very differenct results for WHTC - 1 order of magnitude difference. He gets like 25 [Watt/ m2 s], and I get ~250.

We never had any experience with WHTC before.
Does anybody know why this happens?
AntonZ is offline   Reply With Quote


cfx, hexa mesh, tetra mesh, turbogrid, wall heat transfer

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Is it possible to set constant heat transfer coefficient at a wall? jpina CFX 8 December 24, 2021 05:29
How to set heat transfer coefficient and wall temperature jpina FLUENT 1 March 21, 2016 08:47
Water subcooled boiling Attesz CFX 7 January 5, 2013 03:32
Wall heat transfer coefficient (HTC) problem Mohamed khamis CFX 1 January 15, 2010 23:12
Flow around pipes - heat transfer coefficient on the wall of pipe doodek Main CFD Forum 2 November 23, 2009 08:48

All times are GMT -4. The time now is 22:45.