The droplet impact kinetics on super-hydrophobic surfaces are a crucial, multifaceted interfacial phenomenon. Many science-based technological and industrial applications are based on this interfacial phenomenon. Some examples are coating, printing, the food industry, bio or tissue engineering, and printed circuits, etc. After impact on solid surfaces, a droplet may spread, splash, bounce, or deposit. It depends upon the fluid properties, flow conditions, and characteristics of the solid substrate. The process of tuning surface properties, preparation of non-Newtonian fluids of different desirable properties and their characterization, and visualization-based experiments to capture the length scales involved, is extremely time-consuming and challenging. Therefore, numerical simulations serve as a good technique to investigate such a phenomenon. In this research work, an open-source framework OpenFOAM is used to perform the numerical simulations of non-Newtonian fluid droplets on super-hydrophobic surfaces. Xanthan polymer at different concentrations with DI water, exhibiting non-Newtonian fluid behavior, is used.

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Impact Dynamics of Non-Newtonian Drops on Superhydrophobic Surface

  • Man Mohan Singh Patel,
  • Parmod Kumar

摘要

The droplet impact kinetics on super-hydrophobic surfaces are a crucial, multifaceted interfacial phenomenon. Many science-based technological and industrial applications are based on this interfacial phenomenon. Some examples are coating, printing, the food industry, bio or tissue engineering, and printed circuits, etc. After impact on solid surfaces, a droplet may spread, splash, bounce, or deposit. It depends upon the fluid properties, flow conditions, and characteristics of the solid substrate. The process of tuning surface properties, preparation of non-Newtonian fluids of different desirable properties and their characterization, and visualization-based experiments to capture the length scales involved, is extremely time-consuming and challenging. Therefore, numerical simulations serve as a good technique to investigate such a phenomenon. In this research work, an open-source framework OpenFOAM is used to perform the numerical simulations of non-Newtonian fluid droplets on super-hydrophobic surfaces. Xanthan polymer at different concentrations with DI water, exhibiting non-Newtonian fluid behavior, is used.