The effects of surfactants on the motion and transport mechanisms of a condensing droplet in a high Reynolds number flow

Conference · Fri Jul 01 00:00:00 EDT 1983 · HTD (Publ.) (Am. Soc. Mech. Eng.); (United States)

OSTI ID:5332841

Chang, T H; Chung, J N

The motion and transport mechanisms of a condensing droplet initially contaminated with surfactant material are examined through a theoretical approach. The effects of the surface active material on the strength of the internal motion of the droplet are determined from the total forces experienced by the droplet at the interface. The surface tension gradient force induced by the surfactant and the shear stress from the relative motion between droplet and its ambient vapor are evaluated on the droplet surface as major forces affecting the internal motion of the droplet. The strength of the internal motion ranges from one order of magnitude smaller than the free stream velocity for slight surfactant contamination to almost a complete stop in motion for high surfactant concentration.

• Research Organization: Department of Mechanical Engineering, Washington State University, Pullman, Washington
• OSTI ID: 5332841
• Report Number(s): CONF-830702-
• Journal Information: HTD (Publ.) (Am. Soc. Mech. Eng.); (United States), Vol. HTD-VOL. 23; Conference: 21. ASME/AIChE national heat transfer conference, Seattle, WA, USA, 24 Jul 1983
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DROPLETS
FLUID FLOW
SURFACTANTS
VAPOR CONDENSATION
CONTAMINATION
FLOW RATE
MOTION
REYNOLDS NUMBER
SHEAR
STRESSES
SURFACE TENSION
VAPORS
FLUIDS
GASES
PARTICLES
SURFACE PROPERTIES
420400* - Engineering- Heat Transfer & Fluid Flow