Natural convection in rectangular cavity

ekha · May 16, 2019, 06:10

Hi,

I am trying to simulate a simple natural convection problem in a rectangular cavity heated from bottom.
As am still beginner to CFD and Fluent, could you please advice me if I can use periodic boundary condition or symmetry at the side walls?
And if periodic how I can specify that boundary condition in fluent please?

Thanks
Esra'a

ssixr · May 16, 2019, 08:47

use wall option with adiabatic condition on

ekha · May 16, 2019, 23:07

Thanks for your reply.

However I am simulating a flow in reservoir heated from bottom (simplifying the shape into a rectangle as a beginning), the fluid in the domain is water and the flow is free to go in and out fro the sides.
In this case does the adiabatic condition apply?

ssixr · May 17, 2019, 02:24

will there be change in temperature in side walls? if not you can use a standard wall temperature...

Quote:

Originally Posted by ekha

Thanks for your reply.

However I am simulating a flow in reservoir heated from bottom (simplifying the shape into a rectangle as a beginning), the fluid in the domain is water and the flow is free to go in and out fro the sides.
In this case does the adiabatic condition apply?

May 16, 2019, 06:10	Natural convection in rectangular cavity	#1
ekha New Member Ekha Join Date: Aug 2018 Posts: 16 Rep Power: 7	Hi, I am trying to simulate a simple natural convection problem in a rectangular cavity heated from bottom. As am still beginner to CFD and Fluent, could you please advice me if I can use periodic boundary condition or symmetry at the side walls? And if periodic how I can specify that boundary condition in fluent please? Thanks Esra'a

May 16, 2019, 08:47	wall	#2
ssixr Member sudhir Join Date: Mar 2009 Location: india Posts: 65 Rep Power: 17	use wall option with adiabatic condition on ekha likes this.

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May 16, 2019, 23:07		#3
ekha New Member Ekha Join Date: Aug 2018 Posts: 16 Rep Power: 7	Thanks for your reply. However I am simulating a flow in reservoir heated from bottom (simplifying the shape into a rectangle as a beginning), the fluid in the domain is water and the flow is free to go in and out fro the sides. In this case does the adiabatic condition apply?