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High Throughput Analysis of Liquid Droplet Impacts
Published on: March 6, 2020
Spreading characteristics of nanofluid droplets impacting onto a solid surface
S M Sohel Murshed1, C A Nieto de Castro
1Centro de Ciências Moleculares e Materiais, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
Journal of Nanoscience and Nanotechnology
|July 23, 2011
Summary
This study reveals how nanoparticle concentration, substrate temperature, and Weber number affect nanofluid droplet spreading on aluminum. Higher nanoparticle concentration increases droplet spread, while higher temperatures decrease it.
Area of Science:
- Fluid Dynamics
- Materials Science
- Nanotechnology
Background:
- Understanding droplet impact dynamics is crucial for applications like heat transfer and coating.
- Nanofluids offer enhanced thermal properties, making their impact behavior significant.
Purpose of the Study:
- To experimentally investigate the spreading characteristics of titanium dioxide (TiO2) nanofluid droplets impinging on an aluminum substrate.
- To analyze the influence of nanoparticle volume fraction, substrate temperature, and Weber number on droplet spreading dynamics.
Main Methods:
- Preparation of TiO2-ethylene glycol nanofluid with 1-5% volumetric concentrations.
- High-speed imaging to capture droplet collision and spreading phenomena.
- Measurement of transient spreading diameter and height.
Main Results:
- Increased nanoparticle volume fraction led to a larger spreading diameter.
- Higher substrate temperatures significantly decreased spreading diameter but increased droplet height.
- Higher Weber numbers resulted in greater final droplet spreading.
Conclusions:
- Nanoparticle concentration, substrate temperature, and Weber number are critical factors influencing nanofluid droplet spreading.
- The findings provide valuable insights for optimizing nanofluid applications involving droplet impacts.
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