Keywords
Dean number
critical Reynolds number
How to Cite
Abstract
The article presents a literature review and a comparative analysis of criterion numbers important in the description and design of coil heat exchangers - the Dean number and the critical Reynolds number. These numbers take into account the specificity of fluid flow in the coil resulting from winding of the circular section pipe on the cylindrical side. Coil geometry necessary in the description of criterion numbers was also discussed due to the significant influence of geometric parameters on the flow structure. The work analyzes the scope of applicability of appropriate criterion formulas in the description of phenomena related to intensification of heat transfer in the coil heat exchanger resulting from the occurrence of secondary flow, which is the effect of interaction of centrifugal forces, inertia forces and forces caused by fluid viscosity.
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