This paper investigates the combined effect of radial magnetic field and viscous dissipation on entropy generation in horizontal co-axial cylinders of generalized Couette flow. The analytical solutions for velocity and temperature profiles are obtained and utilized to compute the entropy generation, Bejan number as well as the average entropy generation number. The effect of relevant parameters on temperature field, velocity field, entropy generation, average entropy and Bejan number are portrayed graphically and discussed. We observed that heat transfer irreversibility dominates irreversibility for both isothermal and isoflux heating near the inner surface of the fixed outer cylinder with higher dominance in the case of isoflux heating. The reverse is seen on the moving inner cylinder.

本文研究了广义库埃特流的水平同轴圆柱体中径向磁场和粘性耗散对熵产生的综合影响。获得了速度和温度曲线的解析解，并将其用于计算熵生成，Bejan数以及平均熵生成数。通过图形描绘并讨论了相关参数对温度场，速度场，熵产生，平均熵和Bejan数的影响。我们观察到，在等通量加热的情况下，固定外圆柱体内表面附近的等温和等通量加热的传热不可逆性占主导地位。在移动的内筒上看到相反的情况。