Spreading and Recoil of Drops Impacting a Hydrophobic Surface

Proceedings of the 7th International and 45th National Conference on Fluid Mechanics and Fluid Power (FMFP) December 10-12, 2018, IIT Bombay, Mumbai, India

4 Pages Posted: 1 May 2019

See all articles by Amit Shrivastava

Amit Shrivastava

University of Petroleum and Energy Studies (UPES)

Ayush Mishra

University of Petroleum and Energy Studies (UPES)

V Chintala

University of Petroleum and Energy Studies (UPES)

Abhay Kumar

University of Petroleum and Energy Studies (UPES)

Ashish Karn

University of Petroleum and Energy Studies, Dehradun

Rohan De

University of Minnesota - Minneapolis

Date Written: December 12, 2018

Abstract

Drop impacts on liquid and solid surfaces have been widely studied for reasons that are relevant both in nature and in industry. Although a slew of prior research has been reported on the different aspects of drop impacts on a solid surface, systematic studies into the durations of each phase upon impact, spreading distance and recoil height with respect to different liquid properties and across a wide range of non-dimensionless numbers are difficult to find. The current study reports the phenomenon of drop impacts in the substrate deposition regime (non-splashing), focusing on the characterization of each stage upon impact and its variation of different non-dimensionless parameters. The results indicate that the drop dynamics is determined by an interplay of drop inertia, viscosity and surface tension. Although Reynolds number and Weber number are conventionally used to characterize drop impacts, a new non-dimensional impact parameter (that is a function of Re and We) is introduced, and it is found out that spreading factor and the different non-dimensional phase durations involved in the drop dynamics scale well with this impact parameter.

Keywords: Drop Impact; Maximum Spreading; Drop Recoil; Impact Parameter; Weber Number

Suggested Citation

Shrivastava, Amit and Mishra, Ayush and Chintala, V and Kumar, Abhay and Karn, Ashish and De, Rohan, Spreading and Recoil of Drops Impacting a Hydrophobic Surface (December 12, 2018). Proceedings of the 7th International and 45th National Conference on Fluid Mechanics and Fluid Power (FMFP) December 10-12, 2018, IIT Bombay, Mumbai, India . Available at SSRN: https://ssrn.com/abstract=3363039 or http://dx.doi.org/10.2139/ssrn.3363039

Amit Shrivastava

University of Petroleum and Energy Studies (UPES) ( email )

Energy Acres
P.O. Bidholi via Premnagar,
Dehradun, IN Uttarakhand 248007
India

Ayush Mishra

University of Petroleum and Energy Studies (UPES) ( email )

Energy Acres
P.O. Bidholi via Premnagar,
Dehradun, IN Uttarakhand 248007
India

V Chintala

University of Petroleum and Energy Studies (UPES) ( email )

Energy Acres
P.O. Bidholi via Premnagar,
Dehradun, IN Uttarakhand 248007
India

Abhay Kumar

University of Petroleum and Energy Studies (UPES)

Energy Acres
P.O. Bidholi via Premnagar,
Dehradun, IN Uttarakhand 248007
India

Ashish Karn (Contact Author)

University of Petroleum and Energy Studies, Dehradun ( email )

Energy Acres
P.O. Bidholi via Premnagar,
Dehradun, IN Uttarakhand 248007
India

HOME PAGE: http://umn.edu/~karn

Rohan De

University of Minnesota - Minneapolis ( email )

110 Wulling Hall, 86 Pleasant St, S.E.
308 Harvard Street SE
Minneapolis, MN 55455
United States

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