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two-pipe heat exchanger modelling with thin wall approximation

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Old   November 23, 2021, 09:01
Default two-pipe heat exchanger modelling with thin wall approximation
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Hi there,

In order to model the heat transfer between two fluid flows of a simple straight double-pipe heat exchanger, we can model 4 cell zones:

1. outer pipe wall
2. outer pipe fluid
3. inner pipe wall
4. inner pipe fluid

However, I am wondering whether we can assume a thin wall instead of the inner pipe wall, and just enter a thickness and conductivity of the wall, without modeling the conduction. I mean by only modelling two cell zones:

1. outer pipe fluid
2. inner pipe fluid

and simply add an interface between the two cell zones and defining a thickness and conductivity.

I ask this because I do not need the temperature profile or contour in the inner wall, but I need only the fluid flows behaviour.

Thank you
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double-pipe, heat transfer, thin wall, two-pipe

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