The influence of surfactant on two-phase flow in a flexible-walled channel under bulk equilibrium conditions

The influence of surfactant on two-phase flow in a flexible-walled channel under bulk equilibrium conditions
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表面活性剂对体积平衡条件下柔性壁通道内两相流的影响

DOI:
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
D. Gaver
D. Gaver
中科院分区:
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文献类型:
--
作者:
D. Yap;D. Gaver

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建立了一个初步的模型,该模型考虑了体积平衡条件下表面活性物质的物理化学影响。呼吸道是按照Gaver等人的模型制作的。[J.流体。机甲。319,25-65(1996)]作为柔性壁通道,其中壁是承受纵向拉伸T的膜,并由弹性E支撑,无应力分离距离2H。衬液的粘度为μ,表面张力为γ*。当压力为Pb2的半无限气泡以U的速度稳定地前进,并将管壁分开时,就会发生呼吸道重新开放。表面活性剂存在于衬液(C*)和气液界面(Γ*)中。体相平衡(C~*=C_0),表面活性剂在体相与界面之间的动力学转移速率为k,Γ~*与C~*之间的平衡关系基于亨利等温式(Γeq=KC_0)。表面张力状态方程,即γ*和Γ*之间的关系,假定在Γ方程附近是线性的。马兰戈尼强调发展..。
A preliminary model of pulmonary airway reopening is developed that includes the physicochemical influence of surfactant under bulk-equilibrium conditions. The airway is modeled following Gaver et al. [J. Fluid. Mech. 319, 25–65 (1996)] as a flexible-walled channel, where walls are membranes under longitudinal tension T, and supported with elasticity E with a stress-free separation distance 2H. The lining fluid has viscosity μ and surface tension γ*. Airway reopening occurs when a semi-infinite bubble of air with pressure Pb* progresses steadily at velocity U and separates the walls. Surfactant exists in the lining fluid (C*) and at the air–liquid interface (Γ*). Bulk equilibrium is assumed (C*=C0) and the kinetic transfer of surfactant between the bulk and interface occurs with a rate k. The equilibrium relationship between Γ* and C* is based upon Henry’s isotherm (Γeq=KC0). The surface tension equation of state, a relationship between γ* and Γ*, is assumed to be linear near Γeq. Marangoni stresses devel...
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影响因子: --
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