CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

thermal expansion coefficient in FLUENT

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 21, 2019, 16:13
Default thermal expansion coefficient in FLUENT
New Member
Chaatouf Dounia
Join Date: Jun 2019
Posts: 10
Rep Power: 3
Dounia is on a distinguished road
Hello everyone,

my study case is transient natural convection in which I'm using boussinisq density in air property, the problem is in the thermal expansion coefficient.

-I search online, and I found a value of 0.0032 (1/k) for air.
-but I found a tutorial video in YouTube that use 0.036 (1/k),
-when I'm using a value of 0.00032(1/k) I found good results.
so my question is! is it logical if I use 0.00032 ?

and how can I know the right value in my case?

I'll be so grateful for any comments or answers.

Best wishes,

Dounia is offline   Reply With Quote

Old   November 21, 2019, 17:07
Senior Member
Lucky Tran
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 4,007
Rep Power: 48
LuckyTran has a spectacular aura aboutLuckyTran has a spectacular aura about
For ideal gases, you have \beta = \frac{1}{T} (see Thermal expansion). You can use more real properties if you like.
LuckyTran is offline   Reply With Quote


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
Domain Reference Pressure and mass flow inlet boundary AdidaKK CFX 75 August 20, 2018 05:37
drag coefficient in ansys fluent 12.0 krishna FLUENT 19 April 12, 2018 00:49
Fluent Thermal Dissipation Power Import Christoph.Ha ANSYS 0 November 16, 2017 03:50
Heat trasfer coefficient in a pipe - Fluent elios FLUENT 1 February 6, 2015 14:18
the skin friction coefficient error from Fluent sutthinan Main CFD Forum 2 November 28, 2012 13:03

All times are GMT -4. The time now is 06:37.