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Thermal Boundary Layer - Adiabatic Walls Pipe Flow |
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October 4, 2023, 11:05 |
Thermal Boundary Layer - Adiabatic Walls Pipe Flow
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Member
Tommaso M.
Join Date: Sep 2018
Location: Milan, Italy
Posts: 67
Rep Power: 7 |
Hi All,
I am simulating the air flow in a simple straight pipe with adiabatic walls. The conditions are as follows:
The problem should be very easy. Anyway, looking at the results, I see a high temperature gradient close to the wall surfaces, in direction normal to the wall (passing from 450 C of the core flow to 458 C at the wall prism layer). First, I am a little rusty about this topic but, is it correct to have a thermal boundary layer in a problem like this with adiabatic walls? I would say "yes" because total temperature should remains constant, thus a decrease of velocity at the wall implies an increase of temperature. Anyway, I am keen to listen others' opinion. Second, if it is correct to have it, is such a high temperature change (Delta T = 8 C deg) a reasonable value for this problem? Thanks. Tommy |
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