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Computing heat transfer coefficents at internal boundaries
Posted 04.09.2021, 06:37 GMT-4 0 Replies
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As a simplification of things, let us consider we have flow of a fluid through a three-dimensional rectangular channel which is being heated from the bottom. The boundary at which the constant heat flux is applied is some distance away from the fluid-solid interface. In other words, it is a thick channel and the problem is that of conjugate heat transfer category.
The non-isothermal flow feature is used to couple the heat transfer and laminar flow modules. The objective is to derive the local heat transfer coefficeint at the flui-solid interface.
Obviously in the above expression, the local wall temperature can be evaluated using the line integral and the local fluid bulk temperature is the surface cross-sectional average at the particular location in the fluid domain.
My question is what option should be used to calculate the local heat flux. In the post -processing section we have many options:
- Domain fluxes > Conductive heat flux magnitude (This can be evaluated at a boundary too)
- Boundary fluxes > Normal conductive heat flux
Which is the correct flux value to use in this scenario ?
Hello Indrasis Mitra
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