Determination of intermittency from the probability density function of a passive scalar

R. W. Bilger; R. A. Antonia; K. R. Sreenivasan

doi:10.1063/1.861348

Determination of intermittency from the probability density function of a passive scalar

R. W. Bilger, R. A. Antonia, K. R. Sreenivasan

Research output: Contribution to journal › Article › peer-review

Abstract

The probability density functions of temperature in the intermittent regions of heated jet and wake flows show a strong spike associated with the temperature of the unheated fluid. The fine structure of this spike fits a Gaussian curve quite closely, and the area under this Gaussian gives an accurate measure of 1-γ where γ is the intermittency factor. The standard deviation of the Gaussian is a measure of the noise due to residual temperature fluctuations in the free-stream and the electronic noise in the measurement system. The accuracy with which the intermittency can be determined is limited by the signal-to-noise ratio.

Original language	English (US)
Pages (from-to)	1471-1474
Number of pages	4
Journal	Physics of Fluids
Volume	19
Issue number	10
DOIs	https://doi.org/10.1063/1.861348
State	Published - 1976

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

Access to Document

10.1063/1.861348

Cite this

@article{4b91bba15d6c4fd4a0279c5e3dbd1465,

title = "Determination of intermittency from the probability density function of a passive scalar",

abstract = "The probability density functions of temperature in the intermittent regions of heated jet and wake flows show a strong spike associated with the temperature of the unheated fluid. The fine structure of this spike fits a Gaussian curve quite closely, and the area under this Gaussian gives an accurate measure of 1-γ where γ is the intermittency factor. The standard deviation of the Gaussian is a measure of the noise due to residual temperature fluctuations in the free-stream and the electronic noise in the measurement system. The accuracy with which the intermittency can be determined is limited by the signal-to-noise ratio.",

author = "Bilger, {R. W.} and Antonia, {R. A.} and Sreenivasan, {K. R.}",

year = "1976",

doi = "10.1063/1.861348",

language = "English (US)",

volume = "19",

pages = "1471--1474",

journal = "Physics of Fluids",

issn = "1070-6631",

publisher = "American Institute of Physics Publising LLC",

number = "10",

}

TY - JOUR

T1 - Determination of intermittency from the probability density function of a passive scalar

AU - Bilger, R. W.

AU - Antonia, R. A.

AU - Sreenivasan, K. R.

PY - 1976

Y1 - 1976

N2 - The probability density functions of temperature in the intermittent regions of heated jet and wake flows show a strong spike associated with the temperature of the unheated fluid. The fine structure of this spike fits a Gaussian curve quite closely, and the area under this Gaussian gives an accurate measure of 1-γ where γ is the intermittency factor. The standard deviation of the Gaussian is a measure of the noise due to residual temperature fluctuations in the free-stream and the electronic noise in the measurement system. The accuracy with which the intermittency can be determined is limited by the signal-to-noise ratio.

AB - The probability density functions of temperature in the intermittent regions of heated jet and wake flows show a strong spike associated with the temperature of the unheated fluid. The fine structure of this spike fits a Gaussian curve quite closely, and the area under this Gaussian gives an accurate measure of 1-γ where γ is the intermittency factor. The standard deviation of the Gaussian is a measure of the noise due to residual temperature fluctuations in the free-stream and the electronic noise in the measurement system. The accuracy with which the intermittency can be determined is limited by the signal-to-noise ratio.

UR - http://www.scopus.com/inward/record.url?scp=36749105306&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36749105306&partnerID=8YFLogxK

U2 - 10.1063/1.861348

DO - 10.1063/1.861348

M3 - Article

AN - SCOPUS:36749105306

SN - 1070-6631

VL - 19

SP - 1471

EP - 1474

JO - Physics of Fluids

JF - Physics of Fluids

IS - 10

ER -

Determination of intermittency from the probability density function of a passive scalar

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this