Journal ArticleDOI
Forced convection transfer around spheres at intermediate reynolds numbers
TLDR
In this article, approximate local and overall Sherwood numbers were predicted theoretically for forced-convection transfer around solid and fluid spheres for Reynolds numbers up to 100 for the case of a thin concentration boundary layer.Abstract:
Approximate local and overall Sherwood numbers have been predicted theoretically for forced-convection transfer around solid and fluid spheres for Reynolds numbers up to 100. The diffusion equation was solved analytically for the case of a thin concentration boundary layer (NPo » 1).
The predicted overall Sherwood numbers are in fair agreement with published semi-empirical correlations.
On predit theoriquement les valeurs approximatives, locales et globales, des nombres de Sherwood pour le transfert par convection forcee autour de spheres solides et fluides, a des nombres de Reynold allant jusqu'a 100. Les auteurs resolvent analytiquement l'equation de diffusion dans le cas d'une couche limite mince (NPo » 1).
Les valeurs globales predites pour les nombres de Sherwood se comparent assez bien a celles que donnent les expressions semi-empiriques deja publiees.read more
Citations
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Journal ArticleDOI
Creeping motion of a sphere through a Bingham plastic
TL;DR: In this article, a finite element/Newton method is presented for solving the free-boundary problem composed of the velocity and pressure fields and the yield surfaces for creeping flow, and the accuracy of solutions is ascertained by mesh refinement and by calculation of the integrals corresponding to the maximum and minimum variational principles for the problem.
Journal ArticleDOI
Mass transfer in the continuous phase around axisymmetric bodies of revolution
A.C. Lochiel,P.H. Calderbank +1 more
TL;DR: Theoretical equations are developed to describe mass transfer around any solid or rapidly circulating axisymmetric body of revolution as discussed by the authors, which apply only when the Peclet and Schmidt numbers are large in value.
Journal ArticleDOI
Correlations for Prediction of Mass Transfer Coefficients in Single Drop Systems and Liquid–Liquid Extraction Columns
A. Kumar,S. Hartland +1 more
TL;DR: In this paper, empirical correlations for the prediction of mass transfer coefficients for single drops are presented, and the average absolute value of the relative error in the predicted values of overall dispersed-phase mass transfer coefficient from the experimental points by using the correlations for individual masstransfer coefficients is 24.5%.
Journal ArticleDOI
Heat transfer, a review of current literature
TL;DR: A review of research on heat transfer published during the preceding year is reviewed in this article, divided into sections dealing with following subjects: donduction, channel flow, boundary-layer flow, flow with separated regions, transfer mechanisms, natural convection, convection from rotating surfaces, combined heat and mass transfer, phase changes, radiation, liquid metals, low-density heat transfer, measurement techniques, heat-transfer applications, and thermodynamic and transport properties.
Journal ArticleDOI
Viscous flow around fluid spheres at intermediate reynolds numbers (II)
TL;DR: In this article, an approximate velocity profile and terminal velocities have been predicted for fluid spheres moving in viscous media under the influence of gravity, using a numerical method after Kawaguti.
References
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Journal ArticleDOI
Contributions to the Theory of Heat Transfer through a Laminar Boundary Layer
TL;DR: In this article, an approximation to the heat transfer rate across a laminar incompressible boundary layer, for arbitrary distribution of main stream velocity and of wall temperature, is obtained by using the energy equation in von Mises's form, and approximating the coefficients in a manner which is most closely correct near the surface.
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Mass transfer from drops and bubbles
TL;DR: In this paper, the authors reported experimental values and semi-theoretical formulae for the rates of solution of drops and bubbles under forced convection conditions, and discussed the effect of surface active agents on the mass transfer rate.
Journal ArticleDOI
On heat transfer between vapour bubbles in motion and the boiling liquid from which they are generated
TL;DR: In this article, the mechanism of heat transfer between a boiling liquid and vapour bubbles in motion is discussed, and the experimental results regarding Fritz' and Ende's experimental results are interpreted.