The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform
Hui Chun Peng - One of the best experts on this subject based on the ideXlab platform.
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The Granule Mechanic Model for Numerical Simulation of Coal Stream in Coal-Fired Power Plant
Applied Mechanics and Materials, 2010Co-Authors: Hui Chun PengAbstract:In this paper, the contact models of Particle system of coal stream are analyzed; the granule Mechanic models of coal stream in different imposed conditions are summarized. Using 3d-discrete element method, a Particle Mechanic model of clumps is constructed by the contact bonding model to simulate the cataclasm phenomena during the coal conveying of Coal-fired power plant, which plays an important role in assuring the fidelity and integrality of 3D virtual coal conveying scene.
Koustuv Debnath - One of the best experts on this subject based on the ideXlab platform.
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Sediment Threshold under Stream Flow on Horizontal and Sloping Beds
Journal of Engineering Mechanics, 1999Co-Authors: Subhasish Dey, Heramba K. Dey Sarker, Koustuv DebnathAbstract:A model is presented to determine the threshold shear stress for noncohesive sediment (uniform and nonuniform) motion on horizontal and stream-wise sloping sedimentary beds, under a unidirectional steady-uniform streamflow. Hydrodynamic and Particle-Mechanic forces on a solitary sediment Particle, resting over a sedimentary bed under the slip-spinning condition, are analyzed including the effect of turbulent fluctuations. Hydrodynamic forces such as drag, shear lift, and Magnus lift are taken into consideration. The drag coefficient is determined using an empirical formula. The inclusion of Magnus lift is significant because spherical Particles spin just before dislodging downstream from their original position due to the differential hydrodynamic force along the vertical. The experimental data of sediment threshold are used to calibrate the model making the lift coefficient as a free parameter. The dependency of normalized threshold shear stress on Particle parameter for various angles of repose and stream-wise bed slopes is presented graphically. The results obtained using the present model are compared with the curves proposed by different investigators and the experimental data of sediment (uniform and nonuniform) threshold for horizontal and stream-wise sloping beds.
Subhasish Dey - One of the best experts on this subject based on the ideXlab platform.
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Sediment Threshold under Stream Flow on Horizontal and Sloping Beds
Journal of Engineering Mechanics, 1999Co-Authors: Subhasish Dey, Heramba K. Dey Sarker, Koustuv DebnathAbstract:A model is presented to determine the threshold shear stress for noncohesive sediment (uniform and nonuniform) motion on horizontal and stream-wise sloping sedimentary beds, under a unidirectional steady-uniform streamflow. Hydrodynamic and Particle-Mechanic forces on a solitary sediment Particle, resting over a sedimentary bed under the slip-spinning condition, are analyzed including the effect of turbulent fluctuations. Hydrodynamic forces such as drag, shear lift, and Magnus lift are taken into consideration. The drag coefficient is determined using an empirical formula. The inclusion of Magnus lift is significant because spherical Particles spin just before dislodging downstream from their original position due to the differential hydrodynamic force along the vertical. The experimental data of sediment threshold are used to calibrate the model making the lift coefficient as a free parameter. The dependency of normalized threshold shear stress on Particle parameter for various angles of repose and stream-wise bed slopes is presented graphically. The results obtained using the present model are compared with the curves proposed by different investigators and the experimental data of sediment (uniform and nonuniform) threshold for horizontal and stream-wise sloping beds.
Heramba K. Dey Sarker - One of the best experts on this subject based on the ideXlab platform.
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Sediment Threshold under Stream Flow on Horizontal and Sloping Beds
Journal of Engineering Mechanics, 1999Co-Authors: Subhasish Dey, Heramba K. Dey Sarker, Koustuv DebnathAbstract:A model is presented to determine the threshold shear stress for noncohesive sediment (uniform and nonuniform) motion on horizontal and stream-wise sloping sedimentary beds, under a unidirectional steady-uniform streamflow. Hydrodynamic and Particle-Mechanic forces on a solitary sediment Particle, resting over a sedimentary bed under the slip-spinning condition, are analyzed including the effect of turbulent fluctuations. Hydrodynamic forces such as drag, shear lift, and Magnus lift are taken into consideration. The drag coefficient is determined using an empirical formula. The inclusion of Magnus lift is significant because spherical Particles spin just before dislodging downstream from their original position due to the differential hydrodynamic force along the vertical. The experimental data of sediment threshold are used to calibrate the model making the lift coefficient as a free parameter. The dependency of normalized threshold shear stress on Particle parameter for various angles of repose and stream-wise bed slopes is presented graphically. The results obtained using the present model are compared with the curves proposed by different investigators and the experimental data of sediment (uniform and nonuniform) threshold for horizontal and stream-wise sloping beds.