Results 171 to 180 of about 16,873 (213)

Effect of Sherwood number on critical constants of diffusion

International Journal of Heat and Mass Transfer, 1998
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Sagiv, Abraham, Brosh, Aviel, Ecker, George Z.   +2 more
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PREDICTING APPARENT SHERWOOD NUMBERS FOR FLUIDIZED BEDS

Drying Technology, 1999
ABSTRACT Mass transfer data of bubbling fluidized beds have been reevaluated with a new model which is completely predictive. The model bases on a two-phase approach with active bypass, formally plug flow for the suspension gas and a consideration of backmixing in the main kinetic coefficient, i.e. in the apparent particle-to-fluid Sherwood number.
H. Groenewold, E. Tsotsas
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Sherwood number for a swarm of adsorbing spheroidal particles at any peclet number

AIChE Journal, 1997
A simple expression is proposed which can provide reliable estimates of the overall Sherwood number during mass transfer to adsorbing spheroidal particles over the entire range of Peclet values.
V. N. Burganos, F. A. Coutelieris, A. C. Payatakes   +2 more
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Approximate theoretical solution for the Sherwood number of oscillating bubbles at different Reynolds numbers

Chemical Engineering and Processing: Process Intensification, 2010
Abstract In this paper a theoretical approach to the effect of bubble oscillations on the mass transfer rates has been carried out to get a better understanding of the effect of bubble oscillations in multiphase gas–liquid contactors. The perturbation method has been used to approximate the velocity profile surrounding the bubbles while they ...
Mariano Martín, Francisco J. Montes, Miguel A. Galán   +2 more
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Sherwood number correlation for nuclear graphite gasification at high temperature

Progress in Nuclear Energy, 2013
Abstract Gasification of nuclear graphite in the unlikely event of massive air ingress in High-Temperature and Very-High Temperature gas-cooled Reactors is a safety concern, requiring accurate and reliable predictions of the erosion rate of the external surface and within volume pores.
Mohamed S. El-Genk, Jean-Michel P. Tournier   +1 more
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Limiting Sherwood number of sphere packed beds by electrical method

Chemical Engineering Science, 1976
Abstract An electrical method which applies the analogy between electric field and molecular diffusion has been utilized to measure the limiting Sherwood number of packed bed at zero flow rate. This limiting value appropriate to usual mass transfer operations is found 9·40 when expressed in terms of the hydraulic diameter and the area averaged mean ...
Terukatsu Miyauchi, Tatsuji Kikuchi, Keng-Hua Hsu   +2 more
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Soil evaporation from sparse natural vegetation estimated from Sherwood numbers

Journal of Hydrology, 1997
For various purposes and applications it is convenient to have a simple technique available that produces reliable estimates about the contribution of the soil sensible and latent heat of a crop canopy or natural vegetation to the total fluxes. This is especially of importance in the case of a sparse vegetation where the bare soil is the major ...
Jacobs, A.F.G., Verhoef, A.
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A simple model to calculate the Sherwood and Nusselt numbers for discs of various shapes

International Journal of Heat and Mass Transfer, 1988
Abstract A simple model is presented for calculation of the Sherwood number and Nusselt number for discs of various shapes. For an atmometer of circular shape, experiments have been carried out in a lowspeed wind tunnel in order to check the proposed model.
Adrie F.G. Jacobs, Dick Welgraven
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Investigative Study of Local Sherwood Numbers Using Phase Measurement Interferometry

Fluids Engineering, 2004
This paper investigates the relationship between mass and momentum transport. This study of mass transfer is an important design consideration when looking at engineering processes such as evaporation, chemical reactions, corrosion and mixing. Little is know about the relationship. Using the non-intrusive optical technique of Electronic Speckle Pattern
David McGuire, Tara M. Dalton, Mark R. Davies   +2 more
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The limiting Sherwood and Nusselt numbers in sphere-packed beds

Letters in Heat and Mass Transfer, 1977
A model for calculating the limiting values of the Sherwood and the Nusselt numbers is proposed. It is argued that these numbers, when based on local driving forces, must approach finite values as the Reynolds number approaches zero. The calculated results are in good agreement with available experimental data.
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