An Experimental Study on Complete Droplet Rebound from Soft Surfaces: Critical Weber Numbers, Maximum Spreading, and Contact Time

Lei Yang; Ximiao Liu; Jinyang Wang; Peng Zhang

doi:10.1021/acs.langmuir.3c03126

An Experimental Study on Complete Droplet Rebound from Soft Surfaces: Critical Weber Numbers, Maximum Spreading, and Contact Time

Lei Yang^*
, Ximiao Liu
, Jinyang Wang
, Peng Zhang^*

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

14 Citations (Scopus)

Abstract

Droplet impact on soft surfaces (PDMS) was experimentally studied with particular interest in the complete rebound of droplets. This study focuses on the effect of liquid viscosity and the elastic modulus of the substrate on the critical rebound Weber number, maximum spreading, and contact time. Specifically, the lower and upper critical Weber numbers increase with an increasing droplet viscosity. With decreasing PDMS elastic modulus, the upper critical Weber number increases, while the lower critical Weber number decreases. The PDMS elastic modulus does not significantly affect the maximum spreading time and contact time. An interesting phenomenon of discontinuous contact time was experimentally observed and was theoretically interpreted. © 2024 American Chemical Society.

Original language	English
Pages (from-to)	2165-2173
Number of pages	9
Journal	Langmuir
Volume	40
Issue number	4
Online published	17 Jan 2024
DOIs	https://doi.org/10.1021/acs.langmuir.3c03126
Publication status	Published - 30 Jan 2024

Funding

This work is financially supported by the National Key R&D Program of China (Grant no. 2022YFC3800904) and the Natural Science Foundation of Shenzhen, China (Grant no. 20220809155933002). The work in Hong Kong was supported by grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (Nos. CityU 15222421 and CityU 15218820).

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title = "An Experimental Study on Complete Droplet Rebound from Soft Surfaces: Critical Weber Numbers, Maximum Spreading, and Contact Time",

abstract = "Droplet impact on soft surfaces (PDMS) was experimentally studied with particular interest in the complete rebound of droplets. This study focuses on the effect of liquid viscosity and the elastic modulus of the substrate on the critical rebound Weber number, maximum spreading, and contact time. Specifically, the lower and upper critical Weber numbers increase with an increasing droplet viscosity. With decreasing PDMS elastic modulus, the upper critical Weber number increases, while the lower critical Weber number decreases. The PDMS elastic modulus does not significantly affect the maximum spreading time and contact time. An interesting phenomenon of discontinuous contact time was experimentally observed and was theoretically interpreted. {\textcopyright} 2024 American Chemical Society.",

author = "Lei Yang and Ximiao Liu and Jinyang Wang and Peng Zhang",

year = "2024",

month = jan,

day = "30",

doi = "10.1021/acs.langmuir.3c03126",

language = "English",

volume = "40",

pages = "2165--2173",

journal = "Langmuir",

issn = "0743-7463",

publisher = "American Chemical Society",

number = "4",

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TY - JOUR

T1 - An Experimental Study on Complete Droplet Rebound from Soft Surfaces

T2 - Critical Weber Numbers, Maximum Spreading, and Contact Time

AU - Yang, Lei

AU - Liu, Ximiao

AU - Wang, Jinyang

AU - Zhang, Peng

PY - 2024/1/30

Y1 - 2024/1/30

N2 - Droplet impact on soft surfaces (PDMS) was experimentally studied with particular interest in the complete rebound of droplets. This study focuses on the effect of liquid viscosity and the elastic modulus of the substrate on the critical rebound Weber number, maximum spreading, and contact time. Specifically, the lower and upper critical Weber numbers increase with an increasing droplet viscosity. With decreasing PDMS elastic modulus, the upper critical Weber number increases, while the lower critical Weber number decreases. The PDMS elastic modulus does not significantly affect the maximum spreading time and contact time. An interesting phenomenon of discontinuous contact time was experimentally observed and was theoretically interpreted. © 2024 American Chemical Society.

AB - Droplet impact on soft surfaces (PDMS) was experimentally studied with particular interest in the complete rebound of droplets. This study focuses on the effect of liquid viscosity and the elastic modulus of the substrate on the critical rebound Weber number, maximum spreading, and contact time. Specifically, the lower and upper critical Weber numbers increase with an increasing droplet viscosity. With decreasing PDMS elastic modulus, the upper critical Weber number increases, while the lower critical Weber number decreases. The PDMS elastic modulus does not significantly affect the maximum spreading time and contact time. An interesting phenomenon of discontinuous contact time was experimentally observed and was theoretically interpreted. © 2024 American Chemical Society.

UR - https://www.scopus.com/pages/publications/85183518541

UR - https://www.scopus.com/pages/publications/85183518541#tab=impact

U2 - 10.1021/acs.langmuir.3c03126

DO - 10.1021/acs.langmuir.3c03126

M3 - RGC 21 - Publication in refereed journal

C2 - 38232322

SN - 0743-7463

VL - 40

SP - 2165

EP - 2173

JO - Langmuir

JF - Langmuir

IS - 4

ER -

An Experimental Study on Complete Droplet Rebound from Soft Surfaces: Critical Weber Numbers, Maximum Spreading, and Contact Time

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GRF: A Theoretical, Experimental, and Computational Framework for Droplet Collision Modeling in Lagrangian-Eulerian Simulation of Sprays

GRF: Towards Quantitatively Predictive Modelling of Droplet Collision in Spray Simulation: Head-on Collision of Equal-size Droplets

Cite this

An Experimental Study on Complete Droplet Rebound from Soft Surfaces: Critical Weber Numbers, Maximum Spreading, and Contact Time

Abstract

Funding

RGC Funding Information

Access Output

Other Access Options

Permanent Link

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Projects

GRF: A Theoretical, Experimental, and Computational Framework for Droplet Collision Modeling in Lagrangian-Eulerian Simulation of Sprays

GRF: Towards Quantitatively Predictive Modelling of Droplet Collision in Spray Simulation: Head-on Collision of Equal-size Droplets

Cite this