A computer simulation of turbulent jet flow

SummaryThe possibility of obtaining two-dimensional turbulent jet flow from a series of closely-spaced uniform holes in line has been investigated both theoretically and experimentally. The case studied was that of a jet discharging into still fluid of similar density at incompressible speeds. Such a quasi-two-dimensional jet is a particular example of a multiple-interfering jet group.

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Application and comparison of two SGS models in large eddy simulation of free turbulent jet flow

Communications in Nonlinear Science and Numerical Simulation ◽

10.1016/s1007-5704(99)90048-5 ◽

1999 ◽

Vol 4 (1) ◽

pp. 12-19 ◽

Cited By ~ 5

Author(s):

Hong Yan ◽

Mingde Su

Keyword(s):

Large Eddy Simulation ◽

Jet Flow ◽

Turbulent Jet ◽

Eddy Simulation ◽

Large Eddy ◽

Turbulent Jet Flow

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Application and Comparison of Two SGS Models in Large Eddy Simulation of Free Turbulent Jet Flow

Recent Advances in DNS and LES - Fluid Mechanics and its Applications ◽

10.1007/978-94-011-4513-8_40 ◽

1999 ◽

pp. 465-472

Author(s):

Hong Yan ◽

Mingde Su

Keyword(s):

Large Eddy Simulation ◽

Jet Flow ◽

Turbulent Jet ◽

Eddy Simulation ◽

Large Eddy ◽

Turbulent Jet Flow

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A theoretical model of a wake of a body towed in a stratified fluid at large Reynolds and Froude numbers

Nonlinear Processes in Geophysics ◽

10.5194/npg-13-247-2006 ◽

2006 ◽

Vol 13 (3) ◽

pp. 247-253 ◽

Cited By ~ 2

Author(s):

Y. I. Troitskaya ◽

O. A. Druzhinin ◽

D. A. Sergeev ◽

V. V. Papko ◽

G. N. Balandina

Keyword(s):

Experimental Data ◽

Theoretical Model ◽

Momentum Transfer ◽

Hydrodynamic Instability ◽

Jet Flow ◽

Stratified Fluid ◽

Turbulent Jet ◽

Wake Flow ◽

Mean Flow ◽

Turbulent Jet Flow

Abstract. The objective of the present paper is to develop a theoretical model describing the evolution of a turbulent wake behind a towed sphere in a stably stratified fluid at large Froude and Reynolds numbers. The wake flow is considered as a quasi two-dimensional (2-D) turbulent jet flow whose dynamics is governed by the momentum transfer from the mean flow to a quasi-2-D sinuous mode growing due to hydrodynamic instability. The model employs a quasi-linear approximation to describe this momentum transfer. The model scaling coefficients are defined with the use of available experimental data, and the performance of the model is verified by comparison with the results of a direct numerical simulation of a 2-D turbulent jet flow. The model prediction for the temporal development of the wake axis mean velocity is found to be in good agreement with the experimental data obtained by Spedding (1997).

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Analysis of Coupled CFD-DEM Simulations in Dense Particle-Laden Turbulent Jet Flow

Volume 2: Fluid Mechanics; Multiphase Flows ◽

10.1115/fedsm2020-20274 ◽

2020 ◽

Author(s):

Dustin Weaver ◽

Sanja Miskovic

Keyword(s):

Experimental Data ◽

Particle Flux ◽

Axial Direction ◽

Jet Flow ◽

Turbulent Jet ◽

Sufficient Information ◽

Dense Particle ◽

Dem Simulations ◽

Mesh Resolution ◽

Turbulent Jet Flow

Abstract In this paper, coupled CFD-DEM simulations of dense particle-laden jet flow are performed using CFDEM® coupling interface that couples LAMMPS-based LIGGGHTS® DEM engine with OpenFOAM CFD framework. Suspensions of mono-sized spherical glass particles with 80 microns diameter and a mass loading of 0.23 and 0.86 are considered. Three different CFD meshes are used with an average mesh resolution dimension of 3.06, 2.67, and 1.86 particle diameters and it is determined that mesh resolution does not change results for void fraction calculation (using the divided model) of the CFD-DEM equations. Samples of particle flux are taken at 0.1, 10, and 20 nozzle diameters along the axial direction of the jet region. The numerical results for particle flux are compared with a well cited experimental data found in literature. The CFD-DEM simulations in turbulent jet flow are found to be highly sensitive to initial particle velocity inputs but the experimental data provide sufficient information to produce comparable results.

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