Numerical Simulation of Aerated Powder Consolidation

Abstract

When a fine powder is dumped into a silo, the gas trapped by the particles will slowly escape by diffusing through the material. The corresponding uneven gas pressure distribution creates a body force that is taken into account through Darcy's law. By using spatial averaging, the formulation, even though essentially one-dimensional in space, includes effects due to the geometry of the container. An efficient and robust numerical scheme based on a DAE formulation is proposed and implemented. Various computational results are presented and discussed to establish the validity of the approach.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2001
Accession Number
ADA388733

Entities

People

  • K. A. Coffey
  • P. A. Gremaud

Organizations

  • North Carolina State University

Tags

DTIC Thesaurus Topics

  • Barometric Pressure
  • Boundaries
  • Computations
  • Containers
  • Equations
  • Geometry
  • Granular Materials
  • Integral Equations
  • Materials
  • Mathematical Analysis
  • Mathematics
  • Mechanical Properties
  • Plastic Flow
  • Pressure Distribution
  • Pressure Gradients
  • Simulations
  • Stresses

Fields of Study

  • Mathematics

Readers

  • Environmental Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Dynamics.

Technology Areas

  • Space