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cavity dynamics of water drop impact onto immiscible oil pool with different viscosity

Acta Mechanica Sinica 2021年第3期37卷 447-455,I0002页

作者： Muhammad Mohasan Anas Bin Aqeel Pengyu Lv Yantao Yang Huiling Duan SKLTCS and Department of Mechanics and Engineering Science BIC-ESATCollege of EngineeringPeking UniversityBeijing 100871China National University of Sciences and Technology H-12IslamabadPakistan Key Laboratory of High Energy Density Physics Simulation Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China

In this work,we numerically study the impact of a water droplet onto a deep oil *** fluids are immiscible and the viscosity of the pool liquid is changed *** focus on the cavity dynamics during the impact and especially the effects of the pool liquid viscosity and the impacting *** the parameter range explored,we identify the regime where splashing occurs with corolla breaking into droplets,and the regime where no splashing is *** is found for the time evolution of cavity depth for fixed impact velocity and different viscosity,if the cavity depth and time are nondimensionalized by the maximal depth and the time when the maximal depth is *** power-law scalings are also proposed to describe the dependence of the maximal cavity depth and the corresponding time on the impact velocity and pool liquid viscosity,in the term of Froude and Reynolds numbers.

关键词： Drop impact Immiscible fluids cavity dynamics

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Numerical simulation of the effect of waves on cavity dynamics for oblique water entry of a cylinder

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Journal of Hydrodynamics 2020年第6期32卷 1178-1190页

作者： Gui-yong Zhang Zhao Hou Tie-zhi Sun Hai-peng Wei Ning Li Bo Zhou Ying-jie Gao School of Naval Architecture Liaoning Engineering Laboratory for Deep-Sea Floating StructuresDalian University of TechnologyDalian 116024China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian 116024China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai 200240China Beijing Institute of Astronautical Systems Engineering Beijing 100076China Marine Design and Research Institute of China Shanghai 200011China

The water entry process associated with complicated unsteady structures,with consideration of the influence of the waves,is not well *** the present work,the oblique water entry of a cylinder under different regular waves is numerically *** volume of fluid(VOF)method and the sub-grid scale(SGS)stress model based on the large eddy simulation(LES)method are adopted for the 3-D simulation with six degrees of *** present numerical model is based on a wave model,and as shown by the previous work that the predicted cavity evolution in the calm water agrees well with the experimental *** present model is validated and it is shown that it could be used to predict the correct wave periods and *** cavity evolution mechanism,the dynamic characteristics and the vortex structures are *** cavity of the water entry with waves closes more quickly than in the calm water ***,several parametric studies of the water entry with different wave heights and water entry locations are carried *** results provide insights into the effects of the waves on the cavity dynamics for oblique water entry problems.

关键词： Large eddy simulation(LES) wave oblique water entry cavity dynamics

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