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

doi:10.1615/TFEC2020.hte.032058

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

Buildings and Transportation Science Div

Research output: Contribution to journal › Conference article › peer-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 language	English
Pages (from-to)	445-454
Number of pages	10
Journal	Proceedings of the Thermal and Fluids Engineering Summer Conference
Volume	2020-April
DOIs	https://doi.org/10.1615/TFEC2020.hte.032058
State	Published - 2020
Event	5th Thermal and Fluids Engineering Conference, TFEC 2020 - New Orleans, United States Duration: Apr 5 2020 → Apr 8 2020

Funding

This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). The authors acknowledge the support provided by DOE Solar Program Office and the Technology Manager, Dr. Rajgopal Vijaykumar. The support for the project is provided under DOE solar desalination program (DE-FOA-0001778 – 1686)

Funders	Funder number
DOE Solar Program Office
U.S. Department of Energy	DE-FOA-0001778 – 1686

Keywords

Computational fluid dynamics
Heat transfer enhancement
Numerical heat transfer

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10.1615/TFEC2020.hte.032058

Cite this

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

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.",

keywords = "Computational fluid dynamics, Heat transfer enhancement, Numerical heat transfer",

author = "Matthew Sandlin and Kashif Nawaz and Anthony Jacobi and Xiaofei Wang",

year = "2020",

doi = "10.1615/TFEC2020.hte.032058",

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Numerical study of heat transfer enhancement in laminar and turbulent flow in enhanced tubes with uniform and non-uniform thermal boundary conditions. / Sandlin, Matthew; Nawaz, Kashif; Jacobi, Anthony et al.
In: Proceedings of the Thermal and Fluids Engineering Summer Conference, Vol. 2020-April, 2020, p. 445-454.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Numerical study of heat transfer enhancement in laminar and turbulent flow in enhanced tubes with uniform and non-uniform thermal boundary conditions

AU - Sandlin, Matthew

AU - Nawaz, Kashif

AU - Jacobi, Anthony

AU - Wang, Xiaofei

PY - 2020

Y1 - 2020

N2 - 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.

AB - 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.

KW - Computational fluid dynamics

KW - Heat transfer enhancement

KW - Numerical heat transfer

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DO - 10.1615/TFEC2020.hte.032058

M3 - Conference article

AN - SCOPUS:85091375038

SN - 2379-1748

VL - 2020-April

SP - 445

EP - 454

JO - Proceedings of the Thermal and Fluids Engineering Summer Conference

JF - Proceedings of the Thermal and Fluids Engineering Summer Conference

T2 - 5th Thermal and Fluids Engineering Conference, TFEC 2020

Y2 - 5 April 2020 through 8 April 2020

ER -

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

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