Turbulent flow and heat transfer enhancement of mixed convection over heated blocks in a channel

Horng-Wen Wu, Shiang W. Perng

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Purpose - To investigate the heat transfer enhancement performed by installing a rectangular plate turbulator for internal flow modification induced by vortex shedding. Design/methodology/approach - The large eddy simulation (LES) and SIMPLE-C method coupled with preconditioned conjugate gradient methods have been applied to the turbulent flow field and heat transfer enhancement of mixed convection in a block-heated channel. Findings - Provides information about heat transfer performance indicating that heat transfer performance can be affected by various width-to-height ratio of turbulator and Grasehof numbers with a constant Reynolds number. The results show that the installation of turbulator in cross-flow above an upstream block can effectively enhance the heat transfer performance by suitable width-to-height ratio of turbulator and Grasehof numbers. Research limitations/implications - It is limited to two-dimensional mean flow for the turbulent vortex-shedding flow past a long square cylinder. Practical implications - A very useful source of information and favorable advice for people developing heat transfer enhancement for electronic devices. Originality/value - The results of this study may be of interest to engineers attempting to develop thermal control of electronic devices and to researchers interested in the turbulent flow-modification aspects of heat transfer enhancement of mixed convection in a vertical channel.

Original languageEnglish
Pages (from-to)205-225
Number of pages21
JournalInternational Journal of Numerical Methods for Heat and Fluid Flow
Volume15
Issue number2
DOIs
Publication statusPublished - 2005 Feb 28

Fingerprint

Heat Transfer Enhancement
Mixed Convection
Mixed convection
Turbulent Flow
Turbulent flow
Heat transfer
Heat Transfer
Vortex Shedding
Electronics
Square Cylinder
Thermal Control
Internal Flow
Vortex shedding
Cross-flow
Preconditioned Conjugate Gradient Method
Rectangular Plate
Large Eddy Simulation
Design Methodology
Flow Field
Reynolds number

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Applied Mathematics

Cite this

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Turbulent flow and heat transfer enhancement of mixed convection over heated blocks in a channel. / Wu, Horng-Wen; Perng, Shiang W.

In: International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 15, No. 2, 28.02.2005, p. 205-225.

Research output: Contribution to journalArticle

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