Numerical study of heat transfer enhancement in laminar and turbulent flow in enhanced tubes with uniform and non-uniform thermal boundary conditions

Matthew Sandlin, Kashif Nawaz, Anthony Jacobi, Xiaofei Wang

Research output: Contribution to journalConference articlepeer-review

Abstract

Various types of tube enhancements have been proposed in order to increase heat transfer while minimizing any associated increases in pressure drop. This paper presents a numerical study of two different types of enhanced tubes: the relatively common twisted tape insert tube, and a novel tube with airfoil shaped pins on the inner surface. Each tube is studied in both the laminar and turbulent flow regime. In addition to the typical constant temperature and constant flux boundary conditions, a non-constant heat flux boundary condition is applied on one half of the tube, a situation which may be encountered when absorbing solar radiation. In general, each type of enhanced tube offers a thermal performance factor greater than unity at certain Re. In addition, the non-uniform heat flux boundary condition appears to function similarly as the uniform heat flux boundary condition.

Original languageEnglish (US)
Pages (from-to)445-454
Number of pages10
JournalProceedings of the Thermal and Fluids Engineering Summer Conference
Volume2020-April
DOIs
StatePublished - 2020
Event5th Thermal and Fluids Engineering Conference, TFEC 2020 - New Orleans, United States
Duration: Apr 5 2020Apr 8 2020

Keywords

  • Computational fluid dynamics
  • Heat transfer enhancement
  • Numerical heat transfer

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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