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首页> 外文期刊>Journal of Heat Transfer >Surface Energy Variation Effect on the Onset of Thermocapillary Instability of a Thin Liquid Layer Heated from the Side
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Surface Energy Variation Effect on the Onset of Thermocapillary Instability of a Thin Liquid Layer Heated from the Side

机译：表面能变化对从侧面加热的薄液体层的热毛细管不稳定性开始的影响

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摘要

A general interfacial energy balance equation taking into account surface energy variation is derived for viscous two-layer flows. Application of this interfacial energy equation to a thin liquid layer heated from one side using a one-layer model shows that thermocap-illary induced surface energy variation has a tendency to stabilize the system, resulting in an increase in the critical Marangoni number for the onset of thermocapillary instability. Thermocapillary induced surface energy variation tends to decrease the temperature of hot surface spots and increase the temperature of cold surface spots through an absorb-release mechanism. This absorb-release mechanism increases the free surface's capability to convect thermal energy from hot spots to cold spots and thus redistributes the disturbance energy evenly across the free surface. This new stabilizing effect becomes stronger at high surface temperature and at high surface dilatation rate.
机译：对于粘性的两层流，推导了考虑表面能变化的一般界面能平衡方程。使用单层模型将此界面能方程应用于从一侧加热的薄液体层，结果表明，热帽毛细血管引起的表面能变化具有使系统稳定的趋势，从而导致临界Marangoni数增加毛细血管不稳定。热毛细管引起的表面能变化趋于通过吸收释放机制降低热表面斑点的温度并增加冷表面斑点的温度。这种吸收释放机制提高了自由表面将热能从热点转移到寒冷点的能力，从而将干扰能均匀地重新分配到整个自由表面上。在高表面温度和高表面膨胀率下，这种新的稳定作用变得更强。

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