[minaret]

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