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Title: Two-way coupling effects in dilute gas-particle flows/sup 1/

Abstract

A general analysis of gas-particle flows, under the hypotheses of number of particles large enough to consider the solid phase as a continuum and of volume fraction small enough to consider the suspension as dilute, is presented. The Stokes number Sk and the particle loading ratio ..beta.. are shown to be the basic parameters governing the flow. Depending on the values of these two parameters, in one case the reciprocal interaction of the fluid and solid phases must be considered (two-way coupling), in the second case only the effect of the fluid field on the particle motion is relevant (one-way coupling). In the more general case of two-way coupling, the flow is governed by two sets of Navier-Stokes equations, one for each phase, which are coupled together through the particle volume fraction and the momentum interchange forces. The two systems of equations, expressed in the variables velocity, pressure, and particle volume fraction, are solved numerically by a finite difference scheme. The model has been applied to a duct with a sudden restriction, simulating a flow metering device. The coupling effect both on fluid and solid phase fields, the increase of pressure drop, and the energy dissipated in the fluid-solid interactionmore » have been determined as functions of the governing parameters, Sk and ..beta... The parametric study also indicates the ranges of ..beta.. and Sk in which simplified formulations may be assumed.« less

Authors:
; ;
Publication Date:
Research Org.:
Istituto di Propulsione Aerospaziale, Universita di Roma, Rome
OSTI Identifier:
5303298
Report Number(s):
CONF-821101-
Journal ID: CODEN: ASMSA
Resource Type:
Conference
Journal Name:
Am. Soc. Mech. Eng., (Pap.); (United States)
Additional Journal Information:
Journal Volume: 82-WA/FE-1; Conference: ASME winter annual meeting (Engineering applications of laser velocimetry/published in ASME Jr. Fluid Engineering), Phoenix, AZ, USA, 14 Nov 1982
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; GAS FLOW; COUPLING; PARTICULATES; DILUTION; FINITE DIFFERENCE METHOD; FLOWMETERS; FLUID FLOW; LOADING; NAVIER-STOKES EQUATIONS; PARAMETRIC ANALYSIS; PRESSURE DEPENDENCE; PRESSURE DROP; SOLIDS; VELOCITY; VOLUME; DIFFERENTIAL EQUATIONS; EQUATIONS; ITERATIVE METHODS; MATERIALS HANDLING; MEASURING INSTRUMENTS; METERS; NUMERICAL SOLUTION; PARTIAL DIFFERENTIAL EQUATIONS; PARTICLES; 420400* - Engineering- Heat Transfer & Fluid Flow

Citation Formats

DiGiacinto, M, Piva, R, and Sabetta, F. Two-way coupling effects in dilute gas-particle flows/sup 1/. United States: N. p., 1982. Web.
DiGiacinto, M, Piva, R, & Sabetta, F. Two-way coupling effects in dilute gas-particle flows/sup 1/. United States.
DiGiacinto, M, Piva, R, and Sabetta, F. Fri . "Two-way coupling effects in dilute gas-particle flows/sup 1/". United States.
@article{osti_5303298,
title = {Two-way coupling effects in dilute gas-particle flows/sup 1/},
author = {DiGiacinto, M and Piva, R and Sabetta, F},
abstractNote = {A general analysis of gas-particle flows, under the hypotheses of number of particles large enough to consider the solid phase as a continuum and of volume fraction small enough to consider the suspension as dilute, is presented. The Stokes number Sk and the particle loading ratio ..beta.. are shown to be the basic parameters governing the flow. Depending on the values of these two parameters, in one case the reciprocal interaction of the fluid and solid phases must be considered (two-way coupling), in the second case only the effect of the fluid field on the particle motion is relevant (one-way coupling). In the more general case of two-way coupling, the flow is governed by two sets of Navier-Stokes equations, one for each phase, which are coupled together through the particle volume fraction and the momentum interchange forces. The two systems of equations, expressed in the variables velocity, pressure, and particle volume fraction, are solved numerically by a finite difference scheme. The model has been applied to a duct with a sudden restriction, simulating a flow metering device. The coupling effect both on fluid and solid phase fields, the increase of pressure drop, and the energy dissipated in the fluid-solid interaction have been determined as functions of the governing parameters, Sk and ..beta... The parametric study also indicates the ranges of ..beta.. and Sk in which simplified formulations may be assumed.},
doi = {},
url = {https://www.osti.gov/biblio/5303298}, journal = {Am. Soc. Mech. Eng., (Pap.); (United States)},
number = ,
volume = 82-WA/FE-1,
place = {United States},
year = {1982},
month = {1}
}

Conference:
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