# Body-force-method

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 September 8, 2002, 05:10 Body-force-method #1 mahdi Guest   Posts: n/a the body force weighted schem is one of the methods for pressure discretizing. so if any one has some information about this method please anouance me.

 September 13, 2002, 10:34 Re: Body-force-method #2 sri Guest   Posts: n/a Hi, The body force method is used where body forces like gravity etc are present in the domain.Especially natural convection problems require this method.PRESTO is similar to body force method except for it is more valid for quad or hex meshes. hope this helps you ! sri

 September 17, 2002, 02:31 Re: Body-force-method #3 mahdi Guest   Posts: n/a Thanks for your responce. I read your message, but what I wanted is the method and the equation and other parameters for defining the method. If you do have some informations, I would be thanked

 September 17, 2002, 13:17 Re: Body-force-method #4 sri Guest   Posts: n/a Hi Mahdi, This method is already available in Fluent,you have to just select it. sri

 September 23, 2002, 03:40 Re: Body-force-method #5 mahdi Guest   Posts: n/a I do know ,I wanted the scheme in detail to become more familiar with the method.

 January 23, 2013, 10:18 #6 New Member   william moore Join Date: Jan 2013 Posts: 8 Rep Power: 4 I agree with using the Body Force Weighted Method for pressure discretization when strong natural convection buoyancy forces are present due to high Raleigh Number flow. However, what about the case in which there are gravitational forces with both high and low molecular weight gases and with an inverted temperature condition in which the roof of the enclosure has a fixed temperature of say 40 Deg.C and the floor has fixed temperature of 20 Deg.C. In that case there will be little if any bouyancy driven flow, just a thermally stratified layer of stagnant flow. This has caused us to have very difficult issues with convergence when trying to use a turbulent k-epsilon model. Any suggestions? William

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