Heat Transfer Coefficient for Parallel Plates

Online calculator for the heat transfer coefficient in the slot between parallel isothermal plates.

The results in the intermediate region between laminar and turbulent flow, (Re=2000 - 2500), are somewhat jumpy but this is a reflection of the natural uncertainty in that region.

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General

Flow between parallel plates may seem to be a simple heat transfer case. There are nevertheless many flow types to consider. Laminar or turbulent flow is one example but the difference between the fully and the developing flow regions is also important. The correlations used must in addition converge towards the single plate case when the air gap is large.

Given this complexity it is virtually impossible to present a set of equations that link all cases smoothly. This matter is dealt with in chapter 6 of the theory document.

Equations