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

sensible heat flux

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 24, 2005, 06:07
Default sensible heat flux
  #1
tj
Guest
 
Posts: n/a
Hi,

When modelling people in building flows should I use

a solid blockage (such as 101bakelite @20degC) to

afford heat flux (60 watts/person) and obstruction to

the flow?

When I do the internal temperature of the solid ends

up around 200degrees depending on the type of material

used, this means that I have to give the object a

fixed temp instead of a fixed heat flux.

What would be the most representative material to

use. The "person" object in flair v3.6 uses the

domain material but this doesn't offer any

obstruction to the flow.

thanks in advance for advice
  Reply With Quote

Old   April 14, 2005, 22:17
Default Re: sensible heat flux
  #2
mick
Guest
 
Posts: n/a
Just a thought, but why not try creating your own solid air material.

Try this

1/ Copy the props file from d_earth to your local dir. 2/ Put csg10='props' in your Q1 to pick this up. 3/ edit this props file to copy air at 0deg to an entry which is > 100. 4/ I think that PHOENICS should believe that this is then a solid. 4.5/ Give the viscosity a solid value just in case. 5/ make your person out of this solid air.

I think attaching a known heat source must be better then fixing the temp. Of course if the material is not correct, then as you say you will get artificially high temps. Maybe the person should be solid water as we are mostly made out of it.

  Reply With Quote

Reply


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
Total heat transf. rate vs Total surface heat flux Renato Sousa FLUENT 1 April 14, 2020 03:27
ratio of total heat flux and radiative heat flux S.Karthikeyan FLUENT 2 July 1, 2008 03:48
WALL HEAT FLUX V.S. HEAT FLUX tommy CFX 0 December 15, 2005 08:14
heat flux to heat rejection azmir Siemens 0 June 23, 2004 20:53
Heat Transfer Coeff. at Heat Flux Boundary Rushyen CFX 6 January 18, 2001 05:09


All times are GMT -4. The time now is 12:29.