Spreading behavior of a distilled water droplet on a superhydrophobic surface

Research output: Contribution to journalConference article

12 Citations (Scopus)

Abstract

The investigation of dynamic contact angle between distilled water droplet and superhydrophobic surface was conducted experimentally. To obtain the values of contact angle during spreading, shadow method was implemented. We used Schlieren method to control the droplet symmetry. The droplet was formed on the surface by syringe pump using nontraditional bottom-up methodology. The drop growth rate was varied by the syringe pump from 0.005 ml/s to 0.32 ml/s. DCA versus drop volume was obtained for different values of the drop growth rate. Some features of spreading on superhydrophobic surface were pointed out. Interestingly, that the dynamic contact angle increases during all stages previously selected for copper substrates (1-droplet formation; 2-spreading; 3-formation of the equilibrium contact angle). However, at the droplet growth rate 0.005ml/s we found decrease in the contact angle. The droplet was found to take a shape close to a spherical cap in the range of the drop growth rate 0.005 ml/s-0.16 ml/s. At higher rates (0.32 ml/s and higher) liquid splashing was observed.

Original languageEnglish
Article number01054
JournalMATEC Web of Conferences
Volume23
DOIs
Publication statusPublished - 31 Aug 2015
EventInternational Workshop on Heat and Mass Transfer in the Thermal Control System of Technical and Technological Energy Equipment, TSOTR 2015 - Tomsk, Russian Federation
Duration: 22 Apr 201523 Apr 2015

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Water
Contact angle
Syringes
Pumps
Copper
Liquids
Substrates

ASJC Scopus subject areas

  • Chemistry(all)
  • Engineering(all)
  • Materials Science(all)

Cite this

Spreading behavior of a distilled water droplet on a superhydrophobic surface. / Feoktistov, Dmitry V.; Orlova, Evgeniya G.; Islamova, Anastasia G.

In: MATEC Web of Conferences, Vol. 23, 01054, 31.08.2015.

Research output: Contribution to journalConference article

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N2 - The investigation of dynamic contact angle between distilled water droplet and superhydrophobic surface was conducted experimentally. To obtain the values of contact angle during spreading, shadow method was implemented. We used Schlieren method to control the droplet symmetry. The droplet was formed on the surface by syringe pump using nontraditional bottom-up methodology. The drop growth rate was varied by the syringe pump from 0.005 ml/s to 0.32 ml/s. DCA versus drop volume was obtained for different values of the drop growth rate. Some features of spreading on superhydrophobic surface were pointed out. Interestingly, that the dynamic contact angle increases during all stages previously selected for copper substrates (1-droplet formation; 2-spreading; 3-formation of the equilibrium contact angle). However, at the droplet growth rate 0.005ml/s we found decrease in the contact angle. The droplet was found to take a shape close to a spherical cap in the range of the drop growth rate 0.005 ml/s-0.16 ml/s. At higher rates (0.32 ml/s and higher) liquid splashing was observed.

AB - The investigation of dynamic contact angle between distilled water droplet and superhydrophobic surface was conducted experimentally. To obtain the values of contact angle during spreading, shadow method was implemented. We used Schlieren method to control the droplet symmetry. The droplet was formed on the surface by syringe pump using nontraditional bottom-up methodology. The drop growth rate was varied by the syringe pump from 0.005 ml/s to 0.32 ml/s. DCA versus drop volume was obtained for different values of the drop growth rate. Some features of spreading on superhydrophobic surface were pointed out. Interestingly, that the dynamic contact angle increases during all stages previously selected for copper substrates (1-droplet formation; 2-spreading; 3-formation of the equilibrium contact angle). However, at the droplet growth rate 0.005ml/s we found decrease in the contact angle. The droplet was found to take a shape close to a spherical cap in the range of the drop growth rate 0.005 ml/s-0.16 ml/s. At higher rates (0.32 ml/s and higher) liquid splashing was observed.

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