Research Catalog

Effect of liquid droplets on turbulence in a round gaseous jet

Title: Effect of liquid droplets on turbulence in a round gaseous jet [microform] / A.A. Mostafa and S.E. Elghobashi ; [performing organization: University of California at Irving, Dept. of Mechanical Engineering ; sponsoring agency: National Aeronautics and Space Administration].
Author: Mostafa, Abdu A.
Publication: Irvine, Calif. : University of California at Irvine, Dept. of Mechanical Engineering ; [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, [1986]

Details

Additional Authors

Description

ix, 198 p. : ill.

Summary

"The main objective of this investigation is to develop a two-equation turbulence model for dilute vaporizing sprays or in general for dispersed two-phase flows including the effects of phase changes. The model that accounts for the interaction between the two phases is based on rigorously derived equations for turbulence kinetic energy (K) and its dissipation rate epsilon of the carrier phase using the momentum equation of that phase. Closure is achieved by modeling the turbulent correlations, up to third order, in the equations of the mean motion, concentration of the vapor in the carrier phase, and the kinetic energy of turbulence and its dissipation rate for the carrier phase. The governing equations are presented in both the exact and the modeled forms. The governing equations are solved numerically using a finite-difference procedure to test the presented model for the flow of a turbulent axisymmetric gaseous jet laden with either evaporating liquid droplets or solid particles. The predictions include the distribution of the mean velocity, volume fractions of the different phases, concentration of the evaporated material in the carrier phase, turbulence intensity and shear stress of the carrier phase, droplet diameter distribution, and the jet spreading rate. The predictions are in good agreement with the experimental data."--NTIS abstract.

Series Statement

NASA contractor report ; 175063

Uniform Title

NASA contractor report ; NASA CR-175063.

Subject

Note

"February 1986."

Bibliography (note)

Includes bibliographical references (p. 175-186).

Reproduction (note)

Microfiche.

Funding (note)

Prepared for Lewis Research Center under grant

Call Number

GPO Microfiche NAS 1.26:175063

OCLC

marcive236147840

Author

Mostafa, Abdu A.

Title

Effect of liquid droplets on turbulence in a round gaseous jet [microform] / A.A. Mostafa and S.E. Elghobashi ; [performing organization: University of California at Irving, Dept. of Mechanical Engineering ; sponsoring agency: National Aeronautics and Space Administration].

Imprint

Irvine, Calif. : University of California at Irvine, Dept. of Mechanical Engineering ; [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, [1986]

Series

NASA contractor report ; 175063

NASA contractor report ; NASA CR-175063.

Bibliography

Includes bibliographical references (p. 175-186).

Reproduction

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1986. 3 microfiches : negative.

Funding

Prepared for Lewis Research Center under grant NAG 3-176 505-31-42

Indexed Term

Drops (Liquids) - Gas jets - Mathematical models - Turbulence - Energy dissipation - Finite difference theory - Kinetic energy - Shear stress - Turbulent flow

Added Author

Elghobashi, S. E.

University of California, Irvine. Dept. of Mechanical Engineering.

Lewis Research Center.

United States. National Aeronautics and Space Administration.

Other Form:

Print version: Mostafa, Abdu A. Effect of liquid droplets on turbulence in a round gaseous jet. (OCoLC)804856883

Online version: Mostafa, Abdu A. Effect of liquid droplets on turbulence in a round gaseous jet. (OCoLC)804856697

Gpo Item No.

0830-H-14 (MF)

Sudoc No.

NAS 1.26:175063

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