CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

heat transfer through rotating metal wall

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 12, 2016, 10:20
Default heat transfer through rotating metal wall
  #1
New Member
 
Join Date: Sep 2011
Posts: 3
Rep Power: 13
groonm is on a distinguished road
Hi all,

I'm trying to simulate the heating of the rotating metal drum filled with water. The heating is due to electron beam coming from outside, penetrating the metal wall (Ti alloy) and stopping in water. Rotation velocity is 600 - 1200 rpm, flow rate 3 - 5 gpm. Boundary conditions are the following:
Water domain:
rotating
heat transfer option: total energy
turbulence option: k-epsilon
Metal domain:
rotating
heat transfer option: total energy
Interface boundary:
water side
mass and momentum: no slip wall
wall velocity: rotating wall
angular velocity: 0.0001 rad/s (I used this small number just to activate the option. This is a water relative velocity at the water-metal boundary. Must be zero in reality, but when you put zero wall heat transfer does not work)
metal side
boundary type: interface
boundary details: conservative interface flux

The model attached

This device was experimentally tested with real electron beam, and we extracted the value of wall heat transfer coefficient 2-3 times smaller than the simulation gives.

I tried to change manually the wall-adjacent temperature by changing "tbulk for htc" in Expert parameters. I used the value of inlet temperature instead which seems lower, but I did not see essential change in whtc - it's still much higher than the value found in the test.
Is there anything missing in the model?
Attached Images
File Type: png drum_model.png (24.6 KB, 9 views)
groonm is offline   Reply With Quote

Reply

Tags
rotational flow, 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
conjugated heat transfer and couplen wall boundary condition wsh FLUENT 18 April 29, 2020 11:30
Conjugate Heat Transfer: Wall Heat Flux at Coupled Walls? MaxHeat FLUENT 4 September 14, 2017 10:44
Basic Nozzle-Expander Design karmavatar CFX 20 March 20, 2016 08:44
Heat transfer BC at wall- why need wall thickness? Julie FLUENT 7 February 3, 2012 21:41
natural convection mehrdadeng CFX 10 February 25, 2011 05:25


All times are GMT -4. The time now is 19:07.