IRMA-International.org: Creator of Knowledge
Information Resources Management Association
Advancing the Concepts & Practices of Information Resources Management in Modern Organizations

Multiphase Continuum Formulation for Gas-Solids Reacting Flows

Multiphase Continuum Formulation for Gas-Solids Reacting Flows
View Sample PDF
Author(s): Madhava Syamlal (National Energy Technology Laboratory, USA)and Sreekanth Pannala (Oak Ridge National Laboratory, USA)
Copyright: 2011
Pages: 65
Source title: Computational Gas-Solids Flows and Reacting Systems: Theory, Methods and Practice
Source Author(s)/Editor(s): Sreekanth Pannala (Oak Ridge National Laboratory, USA), Madhava Syamlal (National Energy Technology Laboratory, USA)and Thomas J. O'Brien (National Energy Technology Laboratory, USA)
DOI: 10.4018/978-1-61520-651-3.ch001

Purchase

View Multiphase Continuum Formulation for Gas-Solids Reacting Flows on the publisher's website for pricing and purchasing information.

Abstract

This chapter describes the formulation of multiphase continuum models for gas-solids flows with chemical reactions. A typical formulation of the equations is presented here, following the equations in the open-source software MFIX (http://mfix.netl.doe.gov) so that interested users may look up details of the numerical implementation, study the solutions, or experiment with the numerical implementation of alternative formulations. The authors will first provide a brief overview of the significance of gas-solids reacting flows and the challenges in modeling these systems along with various efforts undertaken by different groups over the last 2–3 decades. They will then summarize the methods used to derive multiphase continuum models and to formulate constitutive equations. They will later provide information on the formulation for mass, momentum, granular energy, energy, and species balance equations for gas and multiple solids phases. They will discuss the constitutive equations required in each of the balance equations; a detailed discussion of certain constitutive equations, such as the gas-solids drag and granular stresses (derived from kinetic theory), will be presented by other authors in later chapters. The authors will point out the differences between different approaches and direct the reader to references that discuss those approaches in detail. They will end the chapter with the example problem of the simulation of a bubbling fluidized bed to illustrate some of the modeling options — physical models, numerical discretization schemes, and grid resolution – that need to be considered to accurately simulate gas-solids systems.

Related Content

Daniel A. Beysens, Yves Garrabos, Bernard Zappoli. © 2021. 31 pages.
Sakir Amiroudine. © 2021. 23 pages.
Lin Chen. © 2021. 57 pages.
Victor Emelyanov, Alexander Gorbunov, Andrey Lednev. © 2021. 49 pages.
Nitesh Kumar, Dipankar Narayan Basu, Lin Chen. © 2021. 22 pages.
Kazuhiro Matsuda, Masanori Inui. © 2021. 35 pages.
Lin Chen. © 2021. 51 pages.
Body Bottom