Effect of insoluble surfactants in condensation on a moving drop: Solutions for intermediate Reynolds numbers

Journal Article · Fri Feb 01 00:00:00 EST 1991 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910530· OSTI ID:5562995

Huang, L J; Ayyaswamy, P S ^[1]

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1. Univ. of Pennsylvania, Philadelphia (USA)

An examination of the hydrodynamics and heat transfer associated with condensation on a moving drop in the intermediate Reynolds number regime (Re = 0(100)) has been carried out. The droplet is taken to be initially contaminated with an insoluble monolayer surfactant material. The drop environment is taken to consist of its own vapor and air. The ambient pressure is taken to be one atmosphere. The formulation entails a simultaneous solution of the quasi-steady elliptic partial differential equations that describe the flow field and transport in the gaseous phase, and the motion inside the liquid drop. The heat transport in the gaseous phase, and the motion inside the liquid drop. The heat transport inside the drop is treated as a transient process. A numerical procedure based on the hybrid difference scheme has been employed. The surface tension gradient force induced by the surfactant and the shear stress from the relative motion between the droplet and its outside velocity field are evaluated. Results have been provided for the interface velocity, drag, surface vorticity, external and internal flow structure, surfactant concentration along the droplet surface, and the Nusselt and Sherwood numbers.

• OSTI ID: 5562995
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Vol. 113:1; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DROPWISE CONDENSATION
HEAT TRANSFER
HYDRODYNAMICS
MASS TRANSFER
AIR POLLUTION
DRAG
NUSSELT NUMBER
REYNOLDS NUMBER
SURFACE TENSION
SURFACTANTS
VELOCITY
ENERGY TRANSFER
FLUID MECHANICS
MECHANICS
POLLUTION
SURFACE PROPERTIES
VAPOR CONDENSATION
420400* - Engineering- Heat Transfer & Fluid Flow