Application of the Analogy between Momentum and Heat Flux in Turbulent Flow of a Straight Tube to a Spiral Tube

A theory-based prediction method was used to estimate the friction factor and heat transfer rate in turbulent flow of a helically coiled tube. The secondary produced by centrifugal force improves mass transfer; therefore, spiral coil pipes are widely variety industrial applications. law wall Reynolds analogy, which states that momentum is equivalent transfer, were this theoretical method. logarithmic characterize velocity profile turbulence-dominated region, local shear stress variation throughout circumference helical tube considered. accurately predicted model. Using Nusselt number circumferential direction determined. effect decreasing within while increasing outside quantified. analogy between flux straight also proven be applicable