The Effect of Gravity and Shear Stress on a Liquid Film Driven in a Horizontal Minichannel at Local Heating

被引：10
作者：
Kabova, Yulia O. [1 ,2 ]
Kuznetsov, V. V. [3 ]
Kabov, O. A. [1 ,2 ]
机构：
[1] Russian Acad Sci, Inst Thermophys, Novosibirsk 630090, Russia
[2] Univ Libre Bruxelles, Micrograv Res Ctr, Chim Phys EP CP165 62, B-1050 Brussels, Belgium
[3] Russian Acad Sci, MA Lavrentyev Hydrodynam Inst, Novosibirsk 630090, Russia
来源：
MICROGRAVITY SCIENCE AND TECHNOLOGY | 2009年 / 21卷
关键词：
Shear-driven liquid film; Local heating; Thermocapillarity; Microgravity; Long-wave theory; THERMOCAPILLARY DEFORMATION; GAS-FLOW;
D O I：
10.1007/s12217-009-9154-4
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The present study is focused on the investigation of gravity effect on thermocapillary deformations in a film flowing under action of co-current gas flow, which creates the tangential force on the gas-liquid interface. The influence of local heating intensity on the heater at a substrate is also investigated. Effects of surface tension, temperature dependent viscosity and thermocapillarity are taken into account. Investigations have shown that gravity has a significant effect on the film deformations and pattern. Decreasing of gravity level leads to a flow destabilization. 3D liquid film pattern noticeably changes in spanwise direction. Increasing of heat flux leads to increasing of liquid film deformations. Dependence of film thinning on heat flux is strongly nonlinear. The most dangerous deformations (regions of minimum film thickness with possible disruption of liquid) take place behind the downstream edge of the heater at any gravity conditions.
引用
收藏
页码：145 / 152
页数：8
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