期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 86, 期 -, 页码 246-257出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2014.07.009
关键词
Microchannel; Electroomotic flow; Magnetohydrodynamic flow; Pressure driven flow; Phan-Thien-Tanner fluid
资金
- SEP-CONACYT [169718]
- SIP-IPN in Mexico [20131319]
- IPN
An analytical study of the flow and temperature fields of a viscoelastic fluid in a rectangular microchannel under the simultaneous influence of electroosmotic (EO), magnetohydrodynamic (MHD) and pressure driven forces (PD) is presented. The non-Newtonian fluid obeys the constitutive relation based on the simplified Phan-Thien-Tanner model (sPIT). The analysis is primarily motivated by the need for increasing the volumetric flow rate in a microchannel by attenuating the inevitable Joule heating effect in electrokinetic flows. The governing equations are presented in dimensionless form containing six dimensionless parameters that control the flow and temperature fields: a parameter representing the viscoelasticity of the fluid, epsilon De(kappa), the ratio of the pressure to electroosmotic forces, Gamma, the ratio of magnetic to electroosmotic forces, Omega*Ha(2), the ratio of the thermal resistances, Lambda, the ratio of the applied electric fields, gamma, and the ratio of the thickness to the length of the microchannel, beta(1). We report the conditions under which it is possible to take advantage on the simultaneous application of EO, MHD and PD forces. In addition, we determine the conditions that must be met to prevent the lateral flow when EO and MHD forces are considered simultaneously [1,2]. The volumetric flow rate is observed to increase in about 40% and the maximum temperature diminishes when MHD and EO forces are present in comparison with the case of a purely EO flow. (C) 2014 Elsevier Masson SAS. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据