Global ETD Search
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Showing 1 to 8 of 8 for “"Granular temperature"”.
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Laboratory Experiments Investigating Entrainment By Debris Flows
… included particle-scale dynamics, such as the “granular temperature” (kinetic energy associated with particle velocity fluctuations). We investigate how total and instantaneous entrainment and deposition vary with macroscopic stresses and particle-scale interactions using laboratory experiments …
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NUMERICAL ANALYSIS OF TURBULENT GAS-SOLID FLOWS IN A ROUGH HORIZONTAL CHANNEL USING THE EULERIAN TWO-FLUID MODEL
… processes including pneumatic transport of granular materials such as pulverized coal, circulating fluidized beds and dust and particle-exhaust pollution control systems. Modelling the gas-solid flow is a major challenge since the flow is turbulent which renders the system non-linear. In …
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Experimental study of highly concentrated two-phase flows
… have been developed and successfully applied to granular shear flows in a Couette apparatus. This apparatus has been designed and constructed to obtain both global quantities and optical measurement of detailed particle movements. Over 48,000 pictures have been taken and analyzed. Concentration, …
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Computer simulations for a scholastic theory of granular drainage
There is a surprising lack of good models for granular flow. In 2002, Bazant proposed a new stochastic kinematic model of granular drainage from a silo. The new model rests on the notion that flow in the silo is caused by the migration of extended regions of excess interstitial space upward from …
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Migration of an intruder particle in a boundary driven shear flow
… collisions within each computational step. A granular shearing flow is induced by allowing the upper and lower bumpy walls to move with the same constant speed in opposite directions. The wall particles are in square arrangements and have the same size as the regular flow particles. The …
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Vibrated granular matter
Granular matter is defined as a large collection of particles the size of which is larger than one micron so that Brownian motion is negligible. Its behavior has been studied at least since the days of Charles-Augustin de Coulomb (1736-1806), who originally stated his law of friction for granular …
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Investigation of fluidized bed systems using coupled DEM-CFD framework
Fluidized beds have widespread industrial applications ranging from chemical industries to power plants. The flow inside a fluidized bed system consists of two main phases, a particle phase and the fluid phase. The two phases are strongly coupled to each other through various forces like drag and …
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Rotary kiln transport phenomena: a study of the bed motion and heat transfer
… distribution of this thermal energy within the granular bed. Although the former has been reasonably well characterized, the latter has not, mainly because of difficulty in predicting flow within the bed. Bed motion in the cross-section is fundamental in determining advective heat transport as …