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Velocity profile in pipe

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Hi everyone!

My model is a pipe mostly covered by insulation but in one place it is connected to a metal sleeve where heat transfer occurs.

Why is the velocity profile so different from inlet to outlet? I think the change is much larger than in tutorial file "Nonisothermal Laminar Flow in a Circular Tube", https://www.comsol.com/model/nonisothermal-laminar-flow-in-a-circular-tube-55861

To evaluate the velocity profile, I use color plots and line plots.

Attached is pictures and my mph file.

Kind regards, Robert Gustavsson



0 Replies Last Post Sep 5, 2022, 3:29 a.m. EDT
COMSOL Moderator

Hello Robert Gustavsson

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