natural convection in 2-D rectangular cavity

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

 August 23, 2011, 09:24 natural convection in 2-D rectangular cavity #1 New Member   Join Date: Aug 2011 Posts: 3 Rep Power: 7 hello..!! i am new to fluent and i want to know how to solve natural convection problem in a rectangular cavity. out of the four walls left is heated and right wall is cold. top and bottom walls are insulated. what should be the boundary conditions and which kind of model should i adopt to obtain the solution. thanks in advance..!

 August 24, 2011, 10:28 #2 Member     NormalVector Join Date: Oct 2010 Posts: 72 Rep Power: 8 The tutorials for FLUENT may be of use to you, there is one that models natural convection but it also includes radiation. Check tutorial 5 here: https://www.sharcnet.ca/Software/Flu...g/main_pre.htm The boundary conditions for your case may be just as they sound; a hot wall at temperature T_hot and a cold wall at T_cold. Make sure you enable the energy equation under the "Models" tab. There are also ways to define properties as a function of temperature (under the "Materials" tab) like the boussinesq approximation, ideal gas, etc depending on the type of fluid you're using. I also have a question for others on this forum about what solver to use for natural convection... pressure based or density based? In the tutorial above they use pressure based but I'm not sure which is appropriate for what Rayleigh Numbers.

 August 24, 2011, 10:46 #3 New Member   Join Date: Aug 2011 Posts: 3 Rep Power: 7 @normalvector.. thanks a lot... i already tried that tutorial and now i want to get the results for higher reynolds number so that i can get secondary vortices at bottom left and bottom right corner of cavity.. guide!

 Tags boundary conditions, cavity problem, fluent, natural convection

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post mebrouki FLUENT 0 March 7, 2010 04:32 msarkar OpenFOAM 1 January 11, 2010 23:21 Dhileep Main CFD Forum 0 January 11, 2009 11:29 tommy CFX 3 September 23, 2008 19:31 Tanveer FLUENT 3 June 17, 2008 01:52

All times are GMT -4. The time now is 19:27.