Gas-liquid Taylor flow in square micro-channels New inlet geometries and interfacial area tuning

作者：Leclerc Arnaud; Philippe Regis^*; Houzelot Vivian; Schweich Daniel; de Bellefon Claude

来源：Chemical Engineering Journal, 2010, 165(1): 290-300.

DOI：10.1016/j.cej.2010.08.021

• Micro channel
• T-junction
• Gas-liquid Taylor flow
• Inlet geometry
• Interfacial area

Effects of different T-junction injectors on the generation of a N(2)-water Taylor flow has been investigated experimentally in a channel of 300 mu m by 300 mu m 4 different inlet geometries and 2 feeding configurations are evaluated in a wide range of fluid flow rates ratio 0 < Q(G)G/Q(perpendicular to) < 35 It has been demonstrated that for a given flow rate ratio different patterns of the unit cell (1bubble + 1 slug) can be formed showing the impact of inlet geometries An attempt to rationalize the result is proposed using a Garstecki-type scaling law for bubble length prediction A unique geometrically based scaling law is discussed and a quite good agreement is obtained to describe the whole set of experiments provided that there is no bubble coalescence
L(bubble)/W(G) = 1 03 (W(G) W(L)/W(channel)(2))(0 33) + 2 17 (W(G)/W(L)) U(G)/U(L)
Finally an analysis in terms of specific interfacial area location (caps or bubble body) is proposed showing the Interest of such inlet geometries to tune this pa

• 出版日期2010-11-15