Modeling a temperature gradient in the fluid domain

aquac · September 30, 2014, 16:18

Hi everyone,

I'm trying to model stimulated natural convection currents in a pond (10 m x 10 m x 3 m deep). Due to the nature of this pond, there's a thermocline (a temperature gradient) in the pone wherein the temperature drops from 30*C at the surface to 20*C at the bottom. This feature is very essential to the model for the convection to be characterized correctly, so I need to input the temperature profile across that pond's depth.

I imagine this can be modeled under 'Profiles' in Cell Zone Domain, but I'm not sure where to go from there? Can anyone guide me through this?

Thanks!

hwet · October 2, 2014, 11:28

maybe you can create boundaries/walls for the top and bottom and set these temperatures as the boundary conditions, but it would probably go linear from 20 to 30, if you actually know by how much they change across the height of the pond you will have to insert a UDF

September 30, 2014, 16:18	Modeling a temperature gradient in the fluid domain	#1
aquac New Member Join Date: Sep 2014 Posts: 2 Rep Power: 0	Hi everyone, I'm trying to model stimulated natural convection currents in a pond (10 m x 10 m x 3 m deep). Due to the nature of this pond, there's a thermocline (a temperature gradient) in the pone wherein the temperature drops from 30C at the surface to 20C at the bottom. This feature is very essential to the model for the convection to be characterized correctly, so I need to input the temperature profile across that pond's depth. I imagine this can be modeled under 'Profiles' in Cell Zone Domain, but I'm not sure where to go from there? Can anyone guide me through this? Thanks!

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October 2, 2014, 11:28		#2
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	maybe you can create boundaries/walls for the top and bottom and set these temperatures as the boundary conditions, but it would probably go linear from 20 to 30, if you actually know by how much they change across the height of the pond you will have to insert a UDF