Abstract Two-phase Taylor flow in microchannels as a critical way to enhance heat dissipation has attracted extensive attention due to the high integration and miniaturization development of electronic devices. To further elucidate the pressure drop and development process of heat transfer characteristics in Taylor flow, a 2-D planar T-junction microchannel with a width of 1 mm was investigated numerically by using the fixed frame computational domain method. The local Nusselt number distribution is divided into four parts for analysis, and the effects of mixture velocity and void fraction on the heat transfer coefficient are also discussed. The results indicate that the injection of gas-phase leads to an increase in pressure gradient, and the flow-pattern related model has a better predictive result. Strong evidence of internal circulation was found when the shear stress in Y direction is not equal to zero in Taylor flow. The investigation of Nusselt number has shown that the mixture velocity and the void fraction affect the temperature field distribution and heat absorption capacity in the liquid slug, respectively. Together these simulation data, nearly 1.8 times higher of the Nusselt number was observed compared to pure water flow.

中文翻译：

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基于FFR法的微通道气液泰勒流压降及传热特性数值研究

摘要 随着电子器件的高度集成化和小型化发展，微通道中的两相泰勒流作为一种重要的散热方式受到了广泛关注。为了进一步阐明泰勒流中的压降和传热特性的发展过程，采用固定框架计算域方法对宽度为1 mm的二维平面T形接头微通道进行了数值研究。局部努塞尔数分布分为四部分进行分析，并讨论了混合速度和空隙率对传热系数的影响。结果表明，注入气相导致压力梯度增加，流型相关模型具有较好的预测效果。当泰勒流中 Y 方向的剪应力不等于零时，发现了内环流的有力证据。努塞尔数的研究表明，混合速度和空隙率分别影响液段塞中的温度场分布和吸热能力。将这些模拟数据加在一起，观察到的努塞尔数比纯水流高出近 1.8 倍。