natural convection square cavity

September 22, 2008, 05:39

Hi !

I'am doing some simulation about natural convection in a square cavity by using cfx 10.0. Just for curiosity, i did a few of calculation using a 3d box with 10 elements in the direction of the thickness and with simmetric boundary conditions on each side in the direction of the thickess. The solution present also a non zero velocity in the direction of this thickness in some grid point. Why ??

September 22, 2008, 19:39

Hi,

Are you saying there is velocity across a symmetry plane? Or are you saying the flow is not planar? Many convection driven flows break up into non-planar flows so this is to be expected.

Glenn Horrocks

September 23, 2008, 04:42

Hi !

The predictions show a not planar flow !

September 23, 2008, 20:31

Hi,

Well, as I say this is normal for convection driven flows. They only remain planar at very low Rayliegh numbers.

Glenn Horrocks

September 22, 2008, 05:39	natural convection square cavity	#1
tommy Guest Posts: n/a	Hi ! I'am doing some simulation about natural convection in a square cavity by using cfx 10.0. Just for curiosity, i did a few of calculation using a 3d box with 10 elements in the direction of the thickness and with simmetric boundary conditions on each side in the direction of the thickess. The solution present also a non zero velocity in the direction of this thickness in some grid point. Why ??

September 22, 2008, 19:39	Re: natural convection square cavity	#2
Glenn Horrocks Guest Posts: n/a	Hi, Are you saying there is velocity across a symmetry plane? Or are you saying the flow is not planar? Many convection driven flows break up into non-planar flows so this is to be expected. Glenn Horrocks

September 23, 2008, 04:42	Re: natural convection square cavity	#3
tommy Guest Posts: n/a	Hi ! The predictions show a not planar flow !

September 23, 2008, 20:31	Re: natural convection square cavity	#4
Glenn Horrocks Guest Posts: n/a	Hi, Well, as I say this is normal for convection driven flows. They only remain planar at very low Rayliegh numbers. Glenn Horrocks

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