Miniature reactors are important devices used for process intensification. They provide a larger surface‐to‐volume ratio and enhance mass transfer and heat transfer significantly. This paper presents a review of transport processes of gas‐liquid and liquid‐liquid two‐phase flow in miniature geometries, in which the hydraulic diameter of the channel lies between 0.2 mm to 3.0 mm. Correlations for predicting the pressure drop in case of both adiabatic and non‐adiabatic gas‐liquid flows are summarized. Gas‐liquid distributions are observed to be different from liquid‐liquid flow distributions. Cross‐sectional geometry does not have any effect on the flow regimes in this range. In case of liquid‐liquid flow, the wall material plays an important role on flow distribution.

中文翻译：

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微型几何中的两相流：气液流的比较

微型反应器是用于过程强化的重要设备。它们提供了更大的表面积与体积之比，并显着增强了传质和传热。本文对气液和液液两相流在微型几何结构中的传输过程进行了综述，其中通道的水力直径介于0.2毫米至3.0毫米之间。总结了在绝热和非绝热气液流动情况下预测压降的相关性。观察到气液分布与液液流分布不同。在此范围内，横截面几何形状对流态没有任何影响。在液-液流动的情况下，壁材料在流量分配中起着重要作用。