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- W42191844 abstract "General flow equations for the flow of gas and solid particles of different sizes and densities were developed. A collection of particles of the same size and density are considered to form a continuum - a particulate phase. Thus the flow of a mixture of gas and particles is described using multiphase flow equations. The empirical information used in the model are as follows. The gas-particle momentum transfer term used is a generalization of the correlation used by Gidaspow and Ettehadieh (1983) in their single particle size fluidized bed model. A generalization of the solids stress term used by them is also used to prevent the solids volume fraction from becoming unrealistically large. To describe the momentum transfer between the particulate phases, an approximate expression was derived. A general purpose computer program to solve the multiphase flow equations based on the K-FIX program (Rivard and Torrey, 1977) was developed. The model was applied to a variety of gas-solids flow problems involving one or two particle types. The model was applied to the study of mixing in a fluidized bed by a bubble. Energy equations were added to a single particle version of the computer model and heat transfer from bed more » to wall was studied. A viscosity term was added to model radial velocity profiles in a pneumatic conveyor. One-dimensional simulation to study segregation in a pneumatic conveyor for a binary mixture was carried out. The results were compared to experimental data. Three multiphase flow models were studied to determine critical flow conditions. It was found that the dense phase transport may be limited by a critical velocity equal to ..sqrt.. of G/rho/sub s/ where G is an ''elastic'' modulus of the powder and rho/sub s/ is it density. 69 refs., 54 figs., 7 tabs. « less" @default.
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- W42191844 date "1985-12-01" @default.
- W42191844 modified "2023-09-27" @default.
- W42191844 title "Dilute, dense-phase and maximum solid-gas transport. Annual report, September 1, 1984-September 1985" @default.
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