Heat transfer and hydrodynamics of slip confusor flow under second-order boundary conditions

被引：0
作者：
A. A. Avramenko
N. P. Dmitrenko
I. V. Shevchuk
机构：
[1] National Academy of Sciences,Institute of Engineering Thermophysics
[2] TH Köln—University of Applied Sciences,Faculty of Computer Science and Engineering Science
来源：
Journal of Thermal Analysis and Calorimetry | 2021年 / 144卷
关键词：
Heat transfer; Microchannel; Velocity slip; Analytical solution;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The paper focused on an analytical analysis of the main features of heat transfer in incompressible steady-state flow in a microconfusor with account for the second-order slip boundary conditions. The second-order boundary conditions serve as a closure of a system of the continuity, transport, and energy differential equations. As a result, novel solutions were obtained for the velocity and temperature profiles, as well as for the friction coefficient and the Nusselt number. These solutions demonstrated that an increase in the Knudsen number leads to a decrease in the Nusselt number. It was shown that the account for the second-order terms in the boundary conditions noticeably affects the fluid flow characteristics and does not influence on the heat transfer characteristics. It was also revealed that flow slippage effects on heat transfer weaken with an increase in the Prandtl number.
引用
收藏
页码：955 / 961
页数：6
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