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首页> 外文会议>International Mechanical Engineering Congress and Exposition >(V08CT09A047)EFFECT OF VISCOUS DISSIPATION ON FORCED CONVECTION HEAT TRANSFER IN PARALLEL PLATE CHANNELS WITH ASYMMETRIC BOUNDARY CONDITIONS
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(V08CT09A047)EFFECT OF VISCOUS DISSIPATION ON FORCED CONVECTION HEAT TRANSFER IN PARALLEL PLATE CHANNELS WITH ASYMMETRIC BOUNDARY CONDITIONS

机译：（V08CT09A047）粘性耗散对不对称边界条件的平行板通道强制对流传热的影响

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摘要

Effect of viscous dissipation on steady two-dimensional laminar forced convection in hydrodynamically developed and thermally developing flow between asymmetrically heated parallel plates (the plates have been kept at unequal temperatures) has been studied. The asymmetric heating is characterized by an asymmetry parameter, A, defined as the ratio of wall temperatures in excess of the fluid inlet temperature. Viscous dissipation is characterized by the Brinkman number, Br. Br <0, when the fluid is being heated and Br >0 when the fluid is being cooled. Heating and cooling have been, defined on the basis of average the wall temperatures.When the walls are subjected to equal wall temperature (i.e., A = 1), it may be recalled that the limiting value for the Nusselt number is 17.5 when viscous dissipation is included (Br ≠ 0), and is independent of the Brinkman number, Br. Similarly, when viscous dissipation is not included, for the case of unequal wall temperatures, (i.e., A ≠ 1), the Nusselt number in the conduction limit is 4, and is independent of the value of A, not equal to one. In the present investigation, it has been shown that the local Nusselt number values in the thermally developing region as well as in the limiting condition, do vary continuously with Brinkman number when the plates are kept at unequal temperatures. The axial location where the Nusselt number displays an unbounded swing depends on the Brinkman number for a given A, and vice versa. The axial position where the Nusselt number displays an unbounded swing depends on the combination of Br and A values and differs from the position for A = 1, Br < 0, or A > 0, Br = 0.
机译：研究了粘性耗散对在不对称加热平行板（板在不等温度下的稳态二维层压中的稳态二维层压电压对流。不对称加热的特征在于不对称参数，a，定义为过量流体入口温度的壁温度的比率。粘性耗散的特点是Brinkman号码，BR。 Br <0，当流体被加热时，当流体冷却时，浆化。已经基于平均壁温度来定义加热和冷却。当壁进行相等的壁温（即，A = 1）时，可以召回粘性耗散时NUSERET数的限制值为17.5包括（br≠0），并且与Brinkman号码无关，BR。类似地，当不包括粘性耗散时，对于不相等的壁温度，（即，A≠1），导通限制中的泡沫数为4，并且与a，不等于一个的值无关。在本研究中，已经示出了热显影区域中的本地营养数值以及限制条件，当板保持在不平等的温度下时，在Brinkman号码中与Brinkman号码连续变化。弯曲数显示未绑定摆动的轴向位置取决于给定A的Brinkman号码，反之亦然。弯曲数显示未绑定摆动的轴向位置取决于BR和值的组合，并且与A = 1，Br <0或A> 0，Br = 0的位置不同。

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