HEAT AND MASS TRANSFER IN A TURBINE CONTACTOR

Technical Report · Sun Dec 01 04:00:00 EST 1963

OSTI ID:4070375

Webster, D S

Tests are reported on a high-intensity mixer for solvent extraction. The two phases enter the mixer through axial ducts, are mixed by a paddle, and are discharged between peripheral vanes. The mixing volume enclosed by the vanes is used with heat transfer measurements to evaluate an observed heat transfer coefficient per unit volume, Us. For comparison, the over-all heat transfer coefficient at the surface of a rigid spherical drop of dispersed phase is combined with mean drop surface area and number of drops per unit volume to yield theoretical values of Us; agreement with observed values is good. However, analogous treatment of mass transfer measurements results in calculated mass transfer coefficients per unit volume of mixture that are lower than observed'' coefficients by a factor of fifty. To obtain agreement it is necessary to postulate that circulation occurs within the drop as a function of turbulent velocity and interfacial tension; this postulate then allows transfer coefficients of the proper magnitude to be calculated by penetration theory. (auth)

• Research Organization: Du Pont de Nemours (F.I.); Co. Savannah River Lab., Aiken, S.C.
• NSA Number: NSA-18-010179
• OSTI ID: 4070375
• Report Number(s): DP-847
• Country of Publication: United States
• Language: English

Related Subjects

CHEMISTRY
CONFIGURATION
EFFICIENCY
EQUATIONS
EXTRACTION COLUMNS
FLUID FLOW
HEAT TRANSFER
MATHEMATICS
MEASURED VALUES
MECHANICS
MIXING
NUMERICALS
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
SPHERES
SURFACE TENSION
SURFACES
TABLES
TESTING
TRANSPORT THEORY
TURBULENCE
VELOCITY
VOLUME
WATER