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

Modeling module with natural convection

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 11, 2019, 12:47
Default Modeling module with natural convection
  #1
New Member
 
Manuel Alejandro Galdeano Ruiz
Join Date: Oct 2019
Posts: 2
Rep Power: 0
manugaldeanoruiz is on a distinguished road
Hi guys!

First time here posting, but with a couple of months learnign from all of you, so thanks in advance.

I need to simulate a module wich is like a hollow box (1m wide, 2m tall and 0.2m depth), open bottom and top surfaces to 1atm, with only the front surfacs under solar radiation, the other 2 sides and back surfaces are isolated.

I'm really starting with ansys fluent, so everything that i have done comes from basically what i have seen on youtube tutorials mixed with the ansys user's guide.

I need help to make a propper setup, this is what i do:

General: Steady
Models: energy ON, Viscous LAMINAR, Radiation DO and SOLAR LOADING
Solution methods: coupled, body force weighted, second order, second order, second order, secodn order, pseudo transient
Solution initialization: hibrid
Run calculation: fluid time scale user specified, 1 pseudo time step. 400 iterations.

The residuals doesnt converge as they should, and even though the results are kind of logic, it would be awesome if someone could help me through this setup, if there is a better one for this example.

Thanks in advance!
manugaldeanoruiz is offline   Reply With Quote

Old   October 11, 2019, 13:20
Default
  #2
New Member
 
Daniel
Join Date: Apr 2018
Posts: 24
Rep Power: 8
dsaen is on a distinguished road
Are you turning ON gravity and modelling air as an ideal gas (variable density)?
In my experience, results for natural convection might change quite a lot if you don't have these options enabled.
dsaen is offline   Reply With Quote

Old   October 11, 2019, 16:16
Default
  #3
New Member
 
Manuel Alejandro Galdeano Ruiz
Join Date: Oct 2019
Posts: 2
Rep Power: 0
manugaldeanoruiz is on a distinguished road
Quote:
Originally Posted by dsaen View Post
Are you turning ON gravity and modelling air as an ideal gas (variable density)?
In my experience, results for natural convection might change quite a lot if you don't have these options enabled.
Yes, gravity is enabled, and I'm also using air as an ideal gas. The rest of the setup should be ok?? Thanks...
manugaldeanoruiz is offline   Reply With Quote

Reply

Tags
radiation do model, solar load

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
Modeling Radiation and Natural Convection itsme_kit ANSYS 0 January 20, 2014 11:55
Thermophysical properties for natural convection Ciefdi OpenFOAM Running, Solving & CFD 0 November 7, 2013 12:44
Natural Convection - Problem in achieving converged solution howhs FLUENT 2 August 28, 2013 11:51
Can someone PLEASE document the development version installation bernd OpenFOAM Installation 76 November 14, 2008 22:51
Natural convection - Inlet boundary condition max91 CFX 1 July 29, 2008 21:28


All times are GMT -4. The time now is 15:20.