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Numerical study on characteristics of flow and thermal fields of offset cylinder arrays in the middle Reynolds number range.

Author(s) : ZHOU S. D., XI G. N.

Type of article: Article, IJR article

Summary

In order to offer a detailed explanation for heat transfer enhancement caused by the instability, a computational model for offset cylinder arrays was established by using a compound grid system. The fully implicit forms of continuous equation, unsteady Navier–Stokes equations and energy equation were finite-differenced. The numerical results demonstrate that cylinder row pitch plays an important role on the flow effects, which enhance or deteriorate the heat transfer on cylinder surfaces. Among these flow effects, the acceleration effect and the instability effect are the main factors for enhancing the downstream cylinders. Moreover, heat transfer enhancement caused by the flow instability is an effective way to reach the aim of reducing flow resistance and promoting heat transfer.

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Pages: 69-79

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Details

  • Original title: Numerical study on characteristics of flow and thermal fields of offset cylinder arrays in the middle Reynolds number range.
  • Record ID : 30017216
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 65
  • Publication date: 2016/05

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