Twoway coupling effects in dilute gasparticle flows
Abstract
A general analysis of gasparticle flows is presented using the hypotheses of a number of particles large enough to consider the solid phase as a continuum and of a volume fraction small enough to consider the suspension as dilute. It is found that the Stokes number (Sk) and the particle loading ratio (beta) are the basic parameters governing the flow. For small values of beta and large values of Sk it is possible to disregard the effect of the particles on the fluid field and simple numerical models based on oneway coupling may be used. However, for larger values of beta and lower Sk, both the fluid and the solid phase flow fields (and as a consequence the overall quantities such as pressure drop and energy dissipation) are determined to be substantially affected by the interphase coupling. A computational model accounting for twoway coupling is presented and found to provide for an accurate simulation. In addition, correlations are developed for determining the pressure drop which increases as a function of beta and Sk, and it is suggested that these correlations may be of practical interest for the investigation of flow metering systems.
 Authors:

 Roma, Universita, Rome, Italy
 Ancona, Universita, Ancona, Italy
 Publication Date:
 OSTI Identifier:
 6510637
 Report Number(s):
 CONF821101
Journal ID: CODEN: JFEGA; TRN: 83006416
 Resource Type:
 Conference
 Journal Name:
 J. Fluids Eng.; (United States)
 Additional Journal Information:
 Journal Volume: 104:82WA/FE1; Conference: ASME winter annual meeting, Phoenix, AZ, USA, 14 Nov 1982
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; GAS FLOW; COUPLING CONSTANTS; FLOW MODELS; PARTICLE KINEMATICS; CONSERVATION LAWS; FINITE DIFFERENCE METHOD; FLOW STRESS; GASEOUS DIFFUSION; NAVIERSTOKES EQUATIONS; PARTICLE SIZE; PRESSURE DROP; PRESSURE GRADIENTS; TWOPHASE FLOW; DIFFERENTIAL EQUATIONS; DIFFUSION; EQUATIONS; FLUID FLOW; ITERATIVE METHODS; MATHEMATICAL MODELS; NUMERICAL SOLUTION; PARTIAL DIFFERENTIAL EQUATIONS; SIZE; STRESSES; 640410*  Fluid Physics General Fluid Dynamics
Citation Formats
Di Giacinto, M, and Piva, R. Twoway coupling effects in dilute gasparticle flows. United States: N. p., 1982.
Web.
Di Giacinto, M, & Piva, R. Twoway coupling effects in dilute gasparticle flows. United States.
Di Giacinto, M, and Piva, R. Wed .
"Twoway coupling effects in dilute gasparticle flows". United States.
@article{osti_6510637,
title = {Twoway coupling effects in dilute gasparticle flows},
author = {Di Giacinto, M and Piva, R},
abstractNote = {A general analysis of gasparticle flows is presented using the hypotheses of a number of particles large enough to consider the solid phase as a continuum and of a volume fraction small enough to consider the suspension as dilute. It is found that the Stokes number (Sk) and the particle loading ratio (beta) are the basic parameters governing the flow. For small values of beta and large values of Sk it is possible to disregard the effect of the particles on the fluid field and simple numerical models based on oneway coupling may be used. However, for larger values of beta and lower Sk, both the fluid and the solid phase flow fields (and as a consequence the overall quantities such as pressure drop and energy dissipation) are determined to be substantially affected by the interphase coupling. A computational model accounting for twoway coupling is presented and found to provide for an accurate simulation. In addition, correlations are developed for determining the pressure drop which increases as a function of beta and Sk, and it is suggested that these correlations may be of practical interest for the investigation of flow metering systems.},
doi = {},
url = {https://www.osti.gov/biblio/6510637},
journal = {J. Fluids Eng.; (United States)},
number = ,
volume = 104:82WA/FE1,
place = {United States},
year = {1982},
month = {9}
}