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首页> 外文会议>National heat transfer conference;NHTC2001 >AN ANALYSIS FOR HEAT TRANSFER IN MICRO-ANNULAR CHANNEL WITH UNSYMMETRICALLY HEATED WALLS IN SLIP FLOW REGIME
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AN ANALYSIS FOR HEAT TRANSFER IN MICRO-ANNULAR CHANNEL WITH UNSYMMETRICALLY HEATED WALLS IN SLIP FLOW REGIME

机译：滑动流域中非对称加热壁的微环形通道内的传热分析

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摘要

A theoretical analysis is processed for flow and heat transfer in micro-annular channel under unsymmetrical wall heat flux in slip flow regime. The momentum and energy equations with the boundary conditions of slip velocity and temperature jump are solved for the fully developed laminar flow and heat transfer of incompressible gas in this microchannel. It was found that the average drag friction coefficient and both the Nusselt number ratios for two unsymmetrically heated walls decrease with the Kn number increasing. Besides, the ratio of inner diameter to outer diameter, r*, has little influence on the average drag friction coefficient ratio, and has a contrast influence on the Nusselt number ratio for inner wall or for outer wall at a fixed heat flux ratio. Similarly, the heat flux ratio also has a contrast influence on these Nusselt number ratios at the same r*.
机译：在滑流状态下，在非对称壁热通量的作用下，对微环形通道内的流动和传热进行了理论分析。求解了具有滑移速度和温度跃变边界条件的动量和能量方程，以充分开发该微通道中不可压缩气体的层流和传热。发现随着Kn数的增加，两个非对称受热壁的平均阻力摩擦系数和Nusselt数比均减小。此外，内径与外径之比r *对平均阻力摩擦系数之比影响很小，而对内壁或外壁在固定热通量比下的努塞尔数比却有相反的影响。同样，在相同的r *时，热通量比也会对这些努塞尔数比产生反差影响。

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