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Creating temperature gradient

Posted Jan 29, 2020, 5:45 a.m. EST Fluid & Heat 1 Reply

Nico Ardian
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Good day,

I am new with COMSOL and I am trying to create a model represeting water flowing in injection well. I build a model that consist of three domain: 1. Water, which is inside of the well 2. Well thickness 3. Earth Formation My question is, how to have temperature gradient that can represent earth temperature gradient, which is 25K/1000m?

1 Reply Last Post Jan 30, 2020, 10:15 a.m. EST
Jeff Hiller COMSOL Employee

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Posted: 5 years ago Jan 30, 2020, 10:15 a.m. EST
Updated: 5 years ago Jan 30, 2020, 10:21 a.m. EST

Hi Nico,

COMSOL's interface is interpreted, so you can type mathematical expressions in the text fields for your model inputs. For instance, if you want the temperature at a boundary to be Tsurf+.025[K/m]*z (where z is the vertical coordinate pointing into the ground and Tsurf is the temperature at ground level), you can simply type that mathematical expression directly in your Temperature boundary condition.

Best,

Jeff

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Jeff Hiller
Hi Nico, COMSOL's interface is interpreted, so you can type mathematical expressions in the text fields for your model inputs. For instance, if you want the temperature at a boundary to be Tsurf+.025[K/m]*z (where z is the vertical coordinate pointing into the ground and Tsurf is the temperature at ground level), you can simply type that mathematical expression directly in your Temperature boundary condition. Best, Jeff

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