Transport processes in flow around a sphere with particular reference to the transfer of mass

Coupled two‐phase mass transfer to spherical drops — Trace gas absorption and oxidation by a single drop

“…Equation (1) can be reduced to dimensionless form for the gas concentration boundary layer (Figure 1 The velocities u and v, which are necessary to solve Equation (2) for the mass transfer region given by the attached portion of the momentum boundary layer, are calculated with the integral method using Pohlhausen velocity profiles (Schlichting 1979). With the point of boundary layer separation known, the additional amount of trace gas absorbed in the wake region could be estimated from Lee & Barrow (1968 Prakash & Sirignano (1978) concluded that the velocity field within the liquid shear layer can be approximated by Hills' vortex with a modified characteristic velocity U, = rR2 = U , / p , where p is in the range of 4 to 10. Ramachandran ( 1985) repeated these calculations and determined a value for p = 7.5.…”

The Elements of Gas—Solid Reaction Systems Involving Single Particles

“…Lee and Barrow [13] were able to show good agreement between local Sherwood numbers measured on napthalene spheres evaporating in air and those calculated from boundary layer theory for the frontal position of a sphere. Lee and Barrow [13] were able to show good agreement between local Sherwood numbers measured on napthalene spheres evaporating in air and those calculated from boundary layer theory for the frontal position of a sphere.…”

Theory of convective drop evaporation in direct contact with an immiscible liquid

“…These experiments should be addressed at stage 1 mentioned earlier. ° Experimental efforts to be directed towards the determination of the ratio of the wake velocity to the main velocity of the dispersed drop in a manner analogous to that reported by Lee and Barrow [19]. This will give a more accurate instantaneous heat transfer coefficient in terms of the separation angle of the boundary layer [11].…”