Modeling the structure functions in linearly forced isotropic turbulence

Evangelos Akylas; Elias Gravanis; Marios Fyrillas; Damian I. Rouson; Stavros C. Kassinos

Modeling the structure functions in linearly forced isotropic turbulence

Evangelos Akylas, Elias Gravanis, Marios Fyrillas, Damian I. Rouson, Stavros C. Kassinos

Department of Mechanical and Aerospace Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

The physics of the linear forcing of isotropic turbulence, allows for some useful estimates of the characteristic length scales of the turbulence produced during the statistically stationary phase. With such estimates we could practically define uniquely the stationary statistics by means of the boxsize of the simulation, the linear forcing parameter and the viscosity of each case. We use such estimations in the Karman-Howarth equation and we solve it in terms of the second and third order structure functions using a generalized Oberlack-Peters closure scheme. The resulting forms and the respective spectra are in very good agreement with experimental and DNS data.

Original language	English
Publication status	Published - Jan 1 2011
Event	7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada Duration: Jul 28 2011 → Jul 31 2011

Other

Other	7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
Country	Canada
City	Ottawa
Period	7/28/11 → 7/31/11

ASJC Scopus subject areas

Fluid Flow and Transfer Processes

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title = "Modeling the structure functions in linearly forced isotropic turbulence",

abstract = "The physics of the linear forcing of isotropic turbulence, allows for some useful estimates of the characteristic length scales of the turbulence produced during the statistically stationary phase. With such estimates we could practically define uniquely the stationary statistics by means of the boxsize of the simulation, the linear forcing parameter and the viscosity of each case. We use such estimations in the Karman-Howarth equation and we solve it in terms of the second and third order structure functions using a generalized Oberlack-Peters closure scheme. The resulting forms and the respective spectra are in very good agreement with experimental and DNS data.",

author = "Evangelos Akylas and Elias Gravanis and Marios Fyrillas and Rouson, {Damian I.} and Kassinos, {Stavros C.}",

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T1 - Modeling the structure functions in linearly forced isotropic turbulence

AU - Akylas, Evangelos

AU - Gravanis, Elias

AU - Fyrillas, Marios

AU - Rouson, Damian I.

AU - Kassinos, Stavros C.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - The physics of the linear forcing of isotropic turbulence, allows for some useful estimates of the characteristic length scales of the turbulence produced during the statistically stationary phase. With such estimates we could practically define uniquely the stationary statistics by means of the boxsize of the simulation, the linear forcing parameter and the viscosity of each case. We use such estimations in the Karman-Howarth equation and we solve it in terms of the second and third order structure functions using a generalized Oberlack-Peters closure scheme. The resulting forms and the respective spectra are in very good agreement with experimental and DNS data.

AB - The physics of the linear forcing of isotropic turbulence, allows for some useful estimates of the characteristic length scales of the turbulence produced during the statistically stationary phase. With such estimates we could practically define uniquely the stationary statistics by means of the boxsize of the simulation, the linear forcing parameter and the viscosity of each case. We use such estimations in the Karman-Howarth equation and we solve it in terms of the second and third order structure functions using a generalized Oberlack-Peters closure scheme. The resulting forms and the respective spectra are in very good agreement with experimental and DNS data.

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T2 - 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011

Y2 - 28 July 2011 through 31 July 2011

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