Investigation of evaluation criterion of axial wall heat conduction in tube laminar flow and heat transfer

被引：0
|
作者：
Lin, Mei [1 ]
Wang, Liangbi [2 ]
Wang, Qiuwang [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Xian 710049, Shaanxi, Peoples R China
[2] Lanzhou Jiaotong Univ, Dept Mech Engn, Lanzhou 730070, Gansu, Peoples R China
来源：
INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014 | 2014年 / 61卷
关键词：
Temperature gradient number; Axial conduction number; Laminar flow;
D O I：
10.1016/j.egypro.2014.12.002
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The effect of axial wall heat conduction in circular tube laminar flow and heat transfer has been investigated under constant temperature boundary conditions. Three-dimensional numerical simulations are performed with different wall thicknesses, wall materials, tube lengths as well as a wide Peclet number range from 7 to 7000. Three parameters including the modified axial conduction number (M), the so-called axial conduction number (M-0) and the temperature gradient number (beta) are comprehensively studied. Under the thermal boundary condition of constant wall temperature, the temperature gradient number is introduced to evaluate the importance of the axial wall heat conduction. (c) 2014 The Authors. Published by Elsevier Ltd.
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页码：2351 / 2354
页数：4
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