The effect of segmentation depth in a helical fin tube bundle on the anisotropic turbulence state
DOI:
https://doi.org/10.31349/RevMexFis.69.060601Keywords:
Helical fin, Segmented fin, Tube bundle, Turbulence, Anisotropy, Reynolds stress tensorAbstract
The large eddy simulation approach was used to perform a numerical simulation of a flow around a helical segmented-fin tube bundle. This work focuses on the study of turbulence and the effect of segment depth on it. The simulation was conducted in an area away from the boundaries of the tube bundle, where the flow is fully-developed, and the use of periodic boundary conditions is possible. The computer-aided design of the helical segmented-fin tube geometry is incorporated into the computational grid from the immersed boundary technique. The Reynolds stress tensor was used to analyze the anisotropic state of turbulence. This flow is characterized by an anisotropic state generated by a flow with a preferential direction. A transfer of momentum in the inter-segment space and contiguous zones was observed. This intersegment flow generates a less anisotropic state of turbulence. This study aimed to understand a possible transformation of heat transfer with marginal geometrical changes and pressure drop increases.
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Copyright (c) 2023 Marco Antonio García Andrade, Eliseo Martínez Espinosa, Martin Salinas-Vazquez, Jorge Ramirez cruz, William Vicente, Javier Rosas Flores
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