Simultaneous Measurement of Drag Coefficients and Mass Transfer of a Chain of Uniform Volatile Drops

摘要

References(17) Cited-By(3) Unsteady simultaneous measurement of the drag coefficients and rates of mass transfer for a chain of uniform water-, hexane- and pentane drops moving in air were made by using an optical method with a microcomputer technique for RePA = 279–1185, Sc = 0.61–1.30, diameter ratios DB/DA = 1.0, dimensionless distance between the centers of drops L/DA = 8.1–67 and dimensionless driving force BM = 0.01–1.35.The observed drag coefficients of a chain of water drops were compared with the theoretical ones proposed in our previous papers. A new correlation is proposed for the drag coefficients of a chain of uniform volatile drops by taking into account the effect of the interaction between drops and of high mass flux.A new correlation of the diffusion fluxes of a chain of uniform volatile drops is proposed by taking into account the effect of the interaction between two drops, of high mass flux and of variable physical properties.