Kinetic and turbulence models for granular and two-phase flows

Ma, D

Title: Kinetic and turbulence models for granular and two-phase flows

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Abstract

This thesis is concerned with developing kinetic and turbulence models for granular and two-phase flows. A kinetic model is introduced and the kinetic equation governing the evolution of the first-order distribution function including the fluid drag force is presented. The particle-fluid interactions are analyzed and the first-order particulate distribution function is determined. The system of equations governing the mean granular velocity, solid volume fraction, and fluctuation energy are developed. The special case of a simple shear flow is studied, and the predictions of the present model are compared with those of other models and the available experimental data. A discrete-element computational code for simulating unsteady three-dimensional free-surface granular flows in regions with complex boundary conditions is also provided. Utilizing the computer code, several transient nonuniform granular flows are analyzed. These include a granular flow down an inclined chute and a three-dimensional granular flow around a block in a channel. Turbulent flows of dispersed multiphase solid-fluid mixtures are considered. From the global equations of balance for each phase and via a special ensemble averaging technique, the local conservation laws for the mean motions are developed.

Authors:: Ma, D

Publication Date:: Thu Jan 01 00:00:00 EST 1987

Research Org.:: Clarkson Univ., Potsdam, NY (USA)

OSTI Identifier:: 7168056

Resource Type:: Thesis/Dissertation

Resource Relation:: Other Information: Thesis (Ph. D.)

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; GRANULAR MATERIALS; FLUID FLOW; TURBULENT FLOW; FLOW MODELS; TWO-PHASE FLOW; FLUIDS; KINETIC EQUATIONS; SOLIDS; THREE-DIMENSIONAL CALCULATIONS; EQUATIONS; MATERIALS; MATHEMATICAL MODELS; 420400* - Engineering- Heat Transfer & Fluid Flow

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                    Ma, D. Kinetic and turbulence models for granular and two-phase flows.  United States: N. p., 1987. 
        Web.

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                    Ma, D. Kinetic and turbulence models for granular and two-phase flows.  United States.

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                    Ma, D. 1987.  
        "Kinetic and turbulence models for granular and two-phase flows".  United States.

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@article{osti_7168056,

  title        = {Kinetic and turbulence models for granular and two-phase flows},

  author       = {Ma, D},

  abstractNote = {This thesis is concerned with developing kinetic and turbulence models for granular and two-phase flows. A kinetic model is introduced and the kinetic equation governing the evolution of the first-order distribution function including the fluid drag force is presented. The particle-fluid interactions are analyzed and the first-order particulate distribution function is determined. The system of equations governing the mean granular velocity, solid volume fraction, and fluctuation energy are developed. The special case of a simple shear flow is studied, and the predictions of the present model are compared with those of other models and the available experimental data. A discrete-element computational code for simulating unsteady three-dimensional free-surface granular flows in regions with complex boundary conditions is also provided. Utilizing the computer code, several transient nonuniform granular flows are analyzed. These include a granular flow down an inclined chute and a three-dimensional granular flow around a block in a channel. Turbulent flows of dispersed multiphase solid-fluid mixtures are considered. From the global equations of balance for each phase and via a special ensemble averaging technique, the local conservation laws for the mean motions are developed.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/7168056},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jan 01 00:00:00 EST 1987},

  month        = {Thu Jan 01 00:00:00 EST 1987}

}

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