A NEW ALGEBRAIC MODEL BASED ON THE VELOCITY CORRELATION TENSOR FOR DNS OF TURBULENT DRAG REDUCTION BY MICROFIBER ADDITIVES

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MOOSAIE AMIN; GOUDARZI KOUROSH; ABBASI JALIL

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:16 Page(s): 223-230

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Title

A NEW ALGEBRAIC MODEL BASED ON THE VELOCITY CORRELATION TENSOR FOR DNS OF TURBULENT DRAG REDUCTION BY MICROFIBER ADDITIVES

Author(s)

MOOSAIE AMIN | GOUDARZI KOUROSH | ABBASI JALIL | Issue Writer Certificate

Keywords

TURBULENT CHANNEL FLOWQ2

DRAG REDUCTIONQ2

ALGEBRAIC CLOSURE MODELQ2

DIRECT NUMERICAL SIMULATIONQ2

VELOCITY CORRELATION TENSORQ2

Abstract

In this paper, a new ALGEBRAIC CLOSURE MODEL for the DNS of turbulent DRAG REDUCTION in a channel flow using microfiber additives is presented. This model is an extension of an existing model and cures some the shortcomings of the old model. In the proposed model, using the VELOCITY CORRELATION TENSOR in the modeling process, more physical conditions of the flow field are taken into account. With this, some of the shortcomings of other models are cured. The proposed model is used to directly simulate turbulent DRAG REDUCTION in a horizontal channel flow under the action of a constant pressure gradient. For this purpose, time-dependent, three-dimensional Navier-Stokes equations for the incompressible flow of a non-Newtonian fluid are numerically solved. Statistical quantities of obtained by the new model are compared with the results of previous simulations. The good agreement between the results demonstrates the proper accuracy of the new model. Especially, the root-mean-square of velocity fluctuations in the streamwise direction is predicted with high accuracy as compared to previous models. Other statistical quantities are also computed with appropriate accuracy. This model is capable of prediction all properties of a microfiber-induced drag-reduced flow.

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APA: Copy

MOOSAIE, AMIN, GOUDARZI, KOUROSH, & ABBASI, JALIL. (2015). A NEW ALGEBRAIC MODEL BASED ON THE VELOCITY CORRELATION TENSOR FOR DNS OF TURBULENT DRAG REDUCTION BY MICROFIBER ADDITIVES. MODARES MECHANICAL ENGINEERING, 14(16), 223-230. SID. https://sid.ir/paper/177885/en

Vancouver: Copy

MOOSAIE AMIN, GOUDARZI KOUROSH, ABBASI JALIL. A NEW ALGEBRAIC MODEL BASED ON THE VELOCITY CORRELATION TENSOR FOR DNS OF TURBULENT DRAG REDUCTION BY MICROFIBER ADDITIVES. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(16):223-230. Available from: https://sid.ir/paper/177885/en

IEEE: Copy

AMIN MOOSAIE, KOUROSH GOUDARZI, and JALIL ABBASI, “A NEW ALGEBRAIC MODEL BASED ON THE VELOCITY CORRELATION TENSOR FOR DNS OF TURBULENT DRAG REDUCTION BY MICROFIBER ADDITIVES,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 16, pp. 223–230, 2015, [Online]. Available: https://sid.ir/paper/177885/en

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