In the present study, the interfacial dynamics of displacement of three dimensional spherical droplet on a rectangular microchannel wall considering wetting effects are studied. The two-phase lattice Boltzmann Shan-Chen model is used to explore the physics. The main focus of this study is to analyse the effect of wettability, low viscosity ratio and capillary number on the displacement of spherical droplet subjected to gravitational force. The hydrophobic and hydrophilic nature of wettabilities on wall surface are considered to study with capillary number, Ca=0.1, 0.35 and 0.66 and viscosity ratio, M ≤ 1. The results are presented in the form of temporal evolution of wetted length and wetted area for combined viscosity ratios and wettability scenario. In the present study, it is observed that in dynamic droplet displacement, the viscosity ratio and capillary number play a significant role. It is found that as viscosity ratio increases, both the wetted area and the wetted length increase and decrease in the case of hydrophilic and hydrophobic wettable wall respectively.
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ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer
January 4–6, 2016
Biopolis, Singapore
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4965-1
PROCEEDINGS PAPER
Mesoscopic Analysis of Droplet Spreading Behaviour on Wetted Surface for Low Viscosity Ratio
Saurabh Bhardwaj,
Saurabh Bhardwaj
Indian Institute of Technology Guwahati, Guwahati, India
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Amaresh Dalal
Amaresh Dalal
Indian Institute of Technology Guwahati, Guwahati, India
Search for other works by this author on:
Saurabh Bhardwaj
Indian Institute of Technology Guwahati, Guwahati, India
Amaresh Dalal
Indian Institute of Technology Guwahati, Guwahati, India
Paper No:
MNHMT2016-6492, V001T01A005; 10 pages
Published Online:
March 15, 2016
Citation
Bhardwaj, S, & Dalal, A. "Mesoscopic Analysis of Droplet Spreading Behaviour on Wetted Surface for Low Viscosity Ratio." Proceedings of the ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. Volume 1: Micro/Nanofluidics and Lab-on-a-Chip; Nanofluids; Micro/Nanoscale Interfacial Transport Phenomena; Micro/Nanoscale Boiling and Condensation Heat Transfer; Micro/Nanoscale Thermal Radiation; Micro/Nanoscale Energy Devices and Systems. Biopolis, Singapore. January 4–6, 2016. V001T01A005. ASME. https://doi.org/10.1115/MNHMT2016-6492
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