【摘 要】
：
In this paper,the authors focused on the wetting motion of a shear-driven liquid film on the prefilmer surface of air-blast atomizer.In the process of wetti
【机 构】
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Research Laboratory,IHI Corporation,Yokohama,Japan
【出 处】
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13th International Conference on Liquid Atomization and Spra
论文部分内容阅读
In this paper,the authors focused on the wetting motion of a shear-driven liquid film on the prefilmer surface of air-blast atomizer.In the process of wetting,liquid film changes its interfacial geometry and eventually determines it in a condition that the energy that liquid film gains from influencing factors becomes the minimum.In this study,the wetting motion of the rivulet with small flow rate is analytically modeled based on the minimal energy concept and the effect of interface geometry is evaluated.The model assumes the interface geometry of the rivulet as a circular arc with a flat part on its center.The ratio of circular-arc to flat part is arbitrarily changed to minimize the energy.As a result,the model revealed the process of wetting in which the rivulet is deformed from circular arc to thin film-like shape with the change of shear stress of air or liquid flow rate.In the experiment,the rivulet is stretched by increase of shear stress in a large flow rate condition.On the contrary,it is shrunk in small flow rate and the same shear stress range.Our analytical approach well described these phenomena.Theoretical analysis also revealed that the contact angle has large effect on the motion of rivulet if the rivulet has circular-arc shape.Its effect becomes less when the rivulet gets close to thin film-like shape.
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