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The limiting behaviour of the turbulent transverse velocity component close to a wall

Published online by Cambridge University Press:  29 March 2006

Kamalesh K. Sirkar  and
Thomas J. Hanratty
Kamalesh K. Sirkar
Affiliation:
Department of Chemistry and Chemical Engineering, University of Illinois, Urbana, Illinois Present address: Uniroyal Research Center, Wayne, New Jersey.
Thomas J. Hanratty
Affiliation:
Department of Chemistry and Chemical Engineering, University of Illinois, Urbana, Illinois
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Abstract

Electrochemical techniques are used to measure the circumferential component of the velocity gradient sz at the wall of a pipe through which a turbulent fluid is flowing. The ratio of the root-mean-squared value of sz to the time-averaged velocity gradient is found to be 0·09 or 0·1, depending on whether corrections are made for frequency response. The frequency spectrum is similar to that for the component of the wall velocity gradient in the direction of mean flow. The amplitude distribution function for sz is very roughly approximated by a Gaussian distribution.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 44 , Issue 3 , 26 November 1970 , pp. 605 - 614
Copyright
© 1970 Cambridge University Press

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References

Fortuna, G. 1970 Ph.D. thesis, University of Illinois.
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Laufer, J. 1954 NACA TR no. 1174.
Mitchell, J. E. & Hanratty, T. J. 1966 J. Fluid Mech. 26, 199
Sirkar, K. K. 1969 Ph.D. thesis, University of Illinois.
Sirkar, K. K. & Hanratty, T. J. 1969 Ind. Eng. Chem. Fund. 8, 18.
Sirkar, K. K. & Hanratty, R. J. 1970 J. Fluid Mech. 44, 58.