3-D Modelisation of Streamwise Injection in Interaction with Compressible Transverse Flow by Two Turbulence Models

Cherrared, Djamel; Benmansour, Saad; Mompean, Gilmar; Dizène, Rabah

doi:10.3923/jas.2008.2510.2522

Cited by 2 publications

(1 citation statement)

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“…However, the literature on linear jet arrays without cross-flow is confined to normal impingement, as witnessed by the studies reported [5][6][7][8]. For inclined jets it appears that cross-flow was a standard accompanying condition, as witnessed by the published literature [9][10][11][12][13][14][15][16][17][18][19][20]. It appears that nothing in the previously published literature applies directly to the problem of interest here.…”

Section: Introductionmentioning

confidence: 70%

Geometric Factors in the Processing of Fine Fiber by Fluid Shear and Heat Transfer

Klinzing¹,

Sparrow

2009

Heat Transfer Engineering

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In this article, a synergistic approach encompassing numerical simulation and laboratory experimentation is used to identify the optimal geometry for the creation of fine fiber by the melt-blown process. The problem involves highly complex fluid flow and convective heat transfer. The fine fiber is created by the use of high-velocity, obliquely impinging air jets that stretch a polymer extrudate in the partially fluid state. High-temperature air is used to maintain the fluidity of the polymeric material as it exits the die. Four different geometrical configurations were investigated with regard to their capability of producing high fluid shear and high temperatures in the critical region just downstream of the emergence of the polymer extrudate from the tip of a die. The results of the numerical simulations provided a definitive conclusion about the relative efficacies of the four investigated geometrical configurations. The velocity and temperature profiles of the oblique jets were carefully documented to identify their decay with increasing downstream distance from the die tip. Velocity profile measurements were in excellent agreement with the numerical predictions, thereby validating the simulation model. Another major parameter of the study, in addition to the geometric-configuration issue, was the pressure difference responsible for setting the magnitude of the jet velocity. The accuracy of the results was established by a mesh independence study and by varying the size of the solution domain.

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Section: Introductionmentioning

confidence: 70%

Geometric Factors in the Processing of Fine Fiber by Fluid Shear and Heat Transfer

Klinzing¹,

Sparrow

2009

Heat Transfer Engineering

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Numerical and experimental study of a jet in a crossflow for different velocity ratio

Kalifa

Habli

Saïd

et al. 2014

J Braz. Soc. Mech. Sci. Eng.

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International audienceThis paper deals with a flow generated by the interaction between a circular jet and a crossflow for different velocity ratios (R = v(0)/u(infinity)). This particular side of this study is of extremely high interest as it allows a better understanding of the mixing process of different interacting flows. This work presents experimental results obtained by means of the particle image velocimetry technique to track the evolution of the jet among the environment flow. Results showed the dependence of the emerging jet flow structure on its ratio velocity. A three-dimensional numerical model with a second-order turbulent model (RSM) and a non-uniform grid system is used to examine the behavior of the emerging jet in the crossflow. The comparison of the numerical and experimental results gives satisfactory agreement

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3-D Modelisation of Streamwise Injection in Interaction with Compressible Transverse Flow by Two Turbulence Models

Cited by 2 publications

References 0 publications

Geometric Factors in the Processing of Fine Fiber by Fluid Shear and Heat Transfer

Geometric Factors in the Processing of Fine Fiber by Fluid Shear and Heat Transfer

Numerical and experimental study of a jet in a crossflow for different velocity ratio

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