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Analysis of liquid sheet and jet flow mechanism after droplet impinging onto liquid film

Liang Gang-Tao Guo Ya-Li Shen Sheng-Qiang

Analysis of liquid sheet and jet flow mechanism after droplet impinging onto liquid film

Liang Gang-Tao, Guo Ya-Li, Shen Sheng-Qiang
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  • Abstract views:  1178
  • PDF Downloads:  1789
  • Cited By: 0
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  • Received Date:  25 May 2012
  • Accepted Date:  01 July 2012
  • Published Online:  20 January 2013

Analysis of liquid sheet and jet flow mechanism after droplet impinging onto liquid film

  • 1. School of Energy and Power Engineering, Dalian University of Technology, Key Lab. for Ocean Energy Utilization and Energy Conservation of Education of Ministry, Dalian 116024, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 51176017, 50976016)

Abstract: Physical and mathematical models are established to simulate the phenomenon of single droplet impinging onto flat liquid film by using the coupled level set and volume of fluid method, and influences of viscosity and surface tension on the morphology of the crown liquid sheet are discussed. Besides, the mechanism of jet flow in the neck region is revealed and the theory of kinematic discontinuity proposed by Yarin and Weiss is verified by analyzing the distributions of pressure and velocity after impingement. The research result shows that the effect of surface tension on the crown morphology is far stronger than that of viscosity. Generation of jet flow is due to the higher pressure difference, the effect of which becomes weak with impact evolution and the jet flow is developed into the crown gradually with the help of radial flow in the liquid film.

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