Chapter II
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چکیده
Two-phase flow through capillary channels is considerably different from two-phase flow through larger channels: viscous (μu/d) and interfacial (γ/d) stresses, both inversely proportional to the diameter, are more important than inertial (ρu) and gravitational (ρgH) stresses. A reasonable definition of the term capillary might be obtained by requiring the dominance of surface tension forces over buoyancy. It has been shown analytically (Bretherton,1961) that the rise velocity of an elongated bubble in a sealed liquid phase capillary vanishes for = < 3.368 (1)
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تاریخ انتشار 2010