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

How to set Prandtl number in natural convection in a heated cavity

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 24, 2013, 09:43
Default How to set Prandtl number in natural convection in a heated cavity
  #1
New Member
 
Krunal Gangawane
Join Date: Aug 2012
Location: IIT Roorkee
Posts: 2
Rep Power: 0
krunalgangawane is on a distinguished road
Hello 2 all,
I am solving 2d natural convection in an differentially heated cavity.
I have used 100*100 grids domain,,,
I have problem in setting Prandtl number..I have 2 solve problem for 5 different Pr and theree Rayleigh numbers..
Procedure I am using:

From the defination of Calculate Value of beta (coeff of thermal expansion) from chosen values of g, DeltaT, density, viscosity, charct lenght and k.

fro setting Pr=(Cp* mu)/k,
let Cp=Pr,
so mu=k;

for different Pr, change values of Cp=Pr
, by this procudure, i am getting correct values of avergae Nu along hot wall..
but by changing Pr, chnage in values of Nu is negligible.
..Can anybody tell me correct way of solving, this problem for range of Pr?

Thanks and regards,
krunalgangawane is offline   Reply With Quote

Reply

Tags
natural conection, prandtl number, rayleigh number

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
questions about high-rayleigh number natural convection heat transfer xlworn CFX 1 June 11, 2012 20:30
questions about high-rayleigh number natural convection heat transfer xlworn FLUENT 0 June 8, 2012 02:51
OF 1.6 | Ubuntu 9.10 (64bit) | GLIBCXX_3.4.11 not found piprus OpenFOAM Installation 22 February 25, 2010 14:43
natural convection in square cavity Dhileep Main CFD Forum 0 January 11, 2009 11:29
BlockMeshmergePatchPairs hjasak OpenFOAM Native Meshers: blockMesh 11 August 15, 2008 07:36


All times are GMT -4. The time now is 13:45.