Analytical solution of Graetz problem in pipe flow with periodic inlet temperature variation

被引:11
|
作者
Cossali, G. E. [1 ]
机构
[1] Univ Bergamo, Fac Ingn, I-24044 Dalmine, BG, Italy
关键词
Graetz problem; Periodic heat transfer; Poiseuille flow; Complex eigenvalues; Kummer functions; TRANSIENT FORCED-CONVECTION; EQUATION; DUCTS;
D O I
10.1016/j.ijheatmasstransfer.2009.02.028
中图分类号
O414.1 [热力学];
学科分类号
摘要
The paper reports an analytical solution for the temperature field in a fully developed pipe flow subject to periodic (of any shape) inlet temperature variation. The solution is given in term of a series of Kummer functions for the cases of uniform and constant wall temperature and wall heat flux, thus comprising also the adiabatic wall case. A "fully developed" region for the fluctuating component of the fluid temperature is also evidenced and closed-form solutions are given. An interpretation of the temperature field as super-position of travelling thermal waves is presented and discussed. (C) 2009 Elsevier Ltd. All rights reserved.
引用
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页码:3396 / 3401
页数:6
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