The connection between the distributed and lumped models for asymmetric cooling of long slabs by heat convection

被引：23

作者：

Alhama, F ^{[1
]}

Campo, A

机构：

[1] Univ Politecn Cartagena, ETS Ingn Ind, Dept Fis Aplicada, Murcia 30203, Spain

[2] Idaho State Univ, Coll Engn, Pocatello, ID 83209 USA

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2001年 / 28卷 / 01期

关键词：

Cooling - Surface treatment - Thermal effects;

D O I：

10.1016/S0735-1933(01)00220-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The unsteady cooling of a long slab by symmetric heat convection is controlled by a single Biot number Bi = (h) over barL/k applied at both surfaces. It is known that the thermal response of the long slab may be analyzed with a lumped model with a small error whenever Bi < 0.1. This paper deals with a plausible extension of the symmetric heat convection implicating an asymmetric heat onvection controlled by two Biot numbers: Bi-1 = L<(h)over bar>(1)/k at the left surface and Bi-2 = L (h) over bar (2)/k at the right surface. The question that needs to be addressed is the following: under what circumstances can the unsteady cooling of a long slab by asymmetric heat convection be treated with a lumped model? (C) 2001 Elsevier Science Ltd.

引用

页码：127 / 137

页数：11