Beating Worthington jet by surfactants

Cell Reports Physical Science

Zhichao Dong¹  Bo Wang²  Haofei Li²  Lei Jiang²  Shijie Liu³  Yilin Wang³  Zhuojun Cai³  Siqi Luo⁴ 

[1] CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing 100190, P.R. China;School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, P.R. China;CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China;School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, P.R. China;

关键词: droplet;    pool;    inhibition of Worthington jet;    surfactant;    surface tension gradient;    water wave;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Worthington jet generated by a drop impacting onto an aqueous pool will make the secondary droplets and aerosols splash into the air, causing air pollution, bodily injury, pathogen transmission, and other hazards. Previous studies inhibited Worthington jet by significantly increasing viscosity or reducing droplet impact velocity, which cannot be applied in most practical cases. Herein, we demonstrate that surfactant solutions of tiny concentrations can effectively inhibit the Worthington jet. The nonequilibrium surface adsorption of surfactants at the liquid-gas interface during the impact process produces a strong surface tension gradient, which weakens the energy of the rebound jet and inhibits the generation of secondary droplets. This convenient and efficient method for inhibiting the Worthington jet can be applied to eliminate the aerosol spread of pathogens and pollutants, as well as the damage and waste caused by liquid splashes.

【 授权许可】

Unknown