Date:

2025-04-30

Title of Paper:

Characteristics of the dimensionless temperature in tubes with axial wall heat conduction

Journal:

Proceedings of the ASME 2017 Heat Transfer Summer Conference

Summary:

Proceedings of the ASME 2017 Heat Transfer Summer Conference
HT2017
July 9-14, 2017, Bellevue, WA, USA
HT2017-4839
CHARACTERISTICS OF THE DIMENSIONLESS TEMPERATURE IN TUBES WITH AXIAL WALL HEAT CONDUCTION


Mei Lin*
School of Energy & Power Engineering
 Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China
janeylinm@mail.xjtu.edu.cn    Shi-cong Li
School of Energy & Power Engineering
 Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China
1175297704@qq.com

Xue-fang Xu
School of Energy & Power Engineering
 Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China
1569589054@qq.com    Qiu-wang Wang
MOE Key Laboratory of Thermo-Fluid Science
and Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China
wangqw@mail.xjtu.edu.cn
ABSTRACT
Characteristics of the dimensionless temperature, θ, are performed to investigate in laminar circular tube flow by numerical simulation with the presence of axial heat conduction. A uniform heat flux is imposed on outside wall surface. The smallest inner diameter of circular tube is only 200 μm. The heat transfer and flow can be described by traditional Navier-Stokes and energy equations. The results shows that θ is identical under the condition of different specified heat flux on the outside wall surface at the same Peclet number. Furthermore, the dimensionless temperature at the tube entrance θ(0) is independent on wall thickness, tube material, working fluid and boundary condition. Hence, the dimensionless temperature at the tube entrance θ(0) is only a function of Peclet number and the corresponding correlation of θ(0) in circular tube is obtained from numerical results and validated by other available cases. Moreover, the correlation of θ(0) is also applied with different cross-sectional shapes of heated solid surface when inner diameter of fluid region is not less than 2.0 mm.
KEYWORDS:
Dimensionless temperature, Laminar flow, Axial wall heat conduction, Circular tube.

Co-author:

Mei Lin, Shicong Li, Xuefang Xu, Qiuwang Wang

Translation or Not:

No

Date of Publication:

2017-07-09