Interphase mass transfer and associated chemical reactions in biphasic liquid flow can be enhanced by tuning the phase distribution in the flow reactor. In reduced dimensions, a balance between surface, inertial and viscous forces results in either segmented flow where dispersed phase is distributed as plugs / droplets in the carrier phase, or thread flow where dispersed phase flows as a continuous thread through an annular film of the carrier phase. Our extensive experiments in up, down and horizontal co-flows of a liquid-liquid mixture through a glass conduit of 2.38 mm diameter reveal a subtle role of gravity in the mesodomain. We note plug generation by gravity assisted squeezing mechanism in upflow and observe squeezing, dripping and jetting mechanisms in the same device by a mere change in conduit orientation. While upflow promotes monodispersed plug generation, downflow is more conductive for thread flow and droplets rather than plugs are formed in horizontal flow. An in-depth investigation of plug generation cycle over a wide range of flow velocities suggests polydispersity to increase as thread pinch off occurs further from the T-entry. The increase in dispersed phase hold-up with flow rate ratio is steeper for segmented flow than thread flow.

通过调整流动反应器中的相分布，可以增强双相液体流中的相间传质和相关的化学反应。在减小的尺寸中，表面力、惯性力和粘性力之间的平衡导致分散相在载体相中以栓塞/液滴的形式分布的分段流动，或分散相作为连续线通过载体的环形膜流动的线状流动阶段。我们对液-液混合物通过直径 2.38 毫米的玻璃导管的向上、向下和水平共流进行的大量实验揭示了重力在介域中的微妙作用。我们注意到通过重力辅助挤压机制在上升流中产生堵塞，并通过导管方向的仅​​仅改变观察同一装置中的挤压、滴落和喷射机制。虽然上流促进了单分散的塞子生成，但下流对线流更具传导性，并且在水平流中形成液滴而不是塞子。在较宽的流速范围内对塞子生成循环的深入研究表明，随着螺纹夹断发生在距 T 形入口更远的地方，多分散性会增加。分段流的分散相滞留率随流速比的增加比螺纹流更陡峭。