Study of the effect of surface roughness on droplet spreading behavior using CFD modeling

• Main Authors: Bin Ramli, M.S., Basit, A., Ku Shaari, K.Z., Keong, L.K.
• Format: Article
• Published: Trans Tech Publications Ltd 2014
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84914164594&doi=10.4028%2fwww.scientific.net%2fAMM.625.378&partnerID=40&md5=d1af15bffe6e44275eb69d6b86cc318d; http://eprints.utp.edu.my/31893/

Water droplet spreading has been simulated at impact velocity of 3.0 m/s, 1.5 m/s and 0.5 m/s on surfaces with texture of �triangle�, �square�, �curve� as well as smooth surface of aluminum. Higher impact velocity induced the droplet to spread faster and has a bigger diameter. At high impact velocity, spreading factor cannot be determined due to splashing and droplet break ups. In addition, at 1.5 m/s the phenomenon of splashing was found to be almost absent except on the surface with �square� texture. �Square� surface tends to splash earlier compared to other surfaces and is followed by �triangle�, �curve� and smooth surface. At low impact velocity, the smooth surface has the highest spreading factor and followed by �triangle�, �square� and �curve� surface. © 2014 Trans Tech Publications, Switzerland.