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Old   March 8, 2018, 19:08
Default Natural Convection
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Hi everyone.

I just started to use Fluent, and I have been trying to study a natural convection in a square cavity with a hot isothermal body.

I have different Rayleigh number( e03 to e06) and I'm varying rhe cavity dimensions of the geometry to obten the Rayleigh number that i wish.

Doing the simulation for e03 i had the results i expected ( I compared to a literature)
But for e04 the temperature and velocity countours were almost the same for e03. I can not understand why.

Geometry: a square with the vertical walls adiabatics and the horizontal walls isothermals( hot upper wall and cold bottom wall)

centered to the square cavity there is a square hot body(1/3 of the cavity) at the same temperature of the hot isothermal wall)

Any suggestion why the results do not change when i change the cavity dimensions?

Thanks in advance
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Old   June 7, 2018, 02:13
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can u send a pic from your geometry?
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fluent, natural convectin

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