DNS OF TURBULENT DRAG REDUCTION IN A HORIZONTAL CHANNEL BY MICROFIBERS AT HIGH REYNOLDS NUMBERS USING AN ALGEBRAIC CLOSURE MODEL

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MOOSAIE A.

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Journal: Modares Mechanical Engineering Year:2013 | Volume:13 | Issue:3 Page(s): 117-127

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Title

DNS OF TURBULENT DRAG REDUCTION IN A HORIZONTAL CHANNEL BY MICROFIBERS AT HIGH REYNOLDS NUMBERS USING AN ALGEBRAIC CLOSURE MODEL

Author(s)

MOOSAIE A. | Issue Writer Certificate

Keywords

TURBULENT DRAG REDUCTIONQ2

DIRECT NUMERICAL SIMULATIONQ2

FIBER SUSPENSIONQ2

ALGEBRAIC CLOSURE MODELQ2

Abstract

In this study, the results of a DIRECT NUMERICAL SIMULATION (DNS) of TURBULENT DRAG REDUCTION by microfibers in a channel flow at a shear Reynolds number of Rer = 950 are reported. For this purpose, we make use of a numerical solution of three-dimensional, time-dependent Navier-Stokes equations for the incompressible flow of a non-Newtonian fluid. The non-Newtonian stress tensor depends on the orientation distribution of fibers, which is computed by a recently-proposed ALGEBRAIC CLOSURE MODEL. It is shown that the use of this algebraic closure, due to the great reduction in computational efforts, enables us to perform a DNS at high Reynolds numbers. Ultimately, statistical quantities of turbulence (in particular, the mean velocity profile, Reynolds stresses, etc.) are presented and discussed. Variations in the isotropy of the Reynolds stress tensor are explained by the aid of Lumley anisotropy map.

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APA: Copy

MOOSAIE, A.. (2013). DNS OF TURBULENT DRAG REDUCTION IN A HORIZONTAL CHANNEL BY MICROFIBERS AT HIGH REYNOLDS NUMBERS USING AN ALGEBRAIC CLOSURE MODEL. MODARES MECHANICAL ENGINEERING, 13(3), 117-127. SID. https://sid.ir/paper/179665/en

Vancouver: Copy

MOOSAIE A.. DNS OF TURBULENT DRAG REDUCTION IN A HORIZONTAL CHANNEL BY MICROFIBERS AT HIGH REYNOLDS NUMBERS USING AN ALGEBRAIC CLOSURE MODEL. MODARES MECHANICAL ENGINEERING[Internet]. 2013;13(3):117-127. Available from: https://sid.ir/paper/179665/en

IEEE: Copy

A. MOOSAIE, “DNS OF TURBULENT DRAG REDUCTION IN A HORIZONTAL CHANNEL BY MICROFIBERS AT HIGH REYNOLDS NUMBERS USING AN ALGEBRAIC CLOSURE MODEL,” MODARES MECHANICAL ENGINEERING, vol. 13, no. 3, pp. 117–127, 2013, [Online]. Available: https://sid.ir/paper/179665/en

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