A Review of Theories for Flowing Granular Materials with Applications to Fluidized Beds and Solids Transport
Year: 1991
Type: report
Abstract: We discuss the development of the theories for flowing granular materials. A historical perspective on the importance and everyday use of granular materials in engineering applications is given, and various examples of what is meant by granular material are presented. In the first section, for future use and convenience, we introduce some basic definitions and fundamental concepts used in granular media. In the second section, we discuss various standard continuum theories implemented for specific use of granular materials for different flow conditions. We will proceed to the turbulence modelling of solids transport by first extending the standard continuum theories to the theories of micropolar materials. We will review the works of investigators who postulate modelling granular materials as non-Newtonian fluids. At this stage of the historical development of these theories, it had become evident that the fluctuating velocity of individual particles plays an important role in the formulation of the stress tensors. In the third section, we give a review of kinetic theory of gases as applied to flowing granular materials. The end of this report reviews the existing constitutive equations for the solid phase in solid-gas flows, and discusses the importance and relevance of modelling the solid phase as granular material. A discussion regarding what is usually referred to as solids pressure'' will be presented. 147 refs., 2 figs.
DOI: 10.2172/5672238
Authors: USDOE, M. Massoudi, E. Boyle
Institution: United States Department of Energy
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Funder: University of Pittsburgh
OpenAlex ID: W1598568976