Temperature dependent droplet impact dynamics on flat and textured surfaces

Journal Article · Thu Mar 01 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3692598· OSTI ID:1041268

Alizadeh, Azar; Bahadur, Vaibhav; Zhong, Sheng; Shang, Wen; Li, Ri; Ruud, James; Yamada, Masako; Ge, Liehi; Dhinojwala, Ali; Sohal, Manohar S ^[1]

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Droplet impact dynamics determines the performance of surfaces used in many applications such as anti-icing, condensation, boiling and heat transfer. We study impact dynamics of water droplets on surfaces with chemistry/texture ranging from hydrophilic to superhydrophobic and across a temperature range spanning below freezing to near boiling conditions. Droplet retraction shows very strong temperature dependence especially for hydrophilic surfaces; it is seen that lower substrate temperatures lead to lesser retraction. Physics-based analyses show that the increased viscosity associated with lower temperatures can explain the decreased retraction. The present findings serve to guide further studies of dynamic fluid-structure interaction at various temperatures.

• Research Organization: Idaho National Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: DOE - EE
• DOE Contract Number: DE-AC07-05ID14517
• OSTI ID: 1041268
• Report Number(s): INL/JOU-11-23533; APPLAB; TRN: US201211%%490
• Journal Information: Applied Physics Letters, Vol. 100, Issue 1; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BOILING
FLUID-STRUCTURE INTERACTIONS
FREEZING
HEAT TRANSFER
PERFORMANCE
SUBSTRATES
TEMPERATURE DEPENDENCE
VISCOSITY
WATER
Droplet impact
superhydrophobic
wetting