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A strain-based Lagrangian-history turbulence theory

Published online by Cambridge University Press:  19 April 2006

Robert H. Kraichnan
Affiliation:
Dublin, New Hampshire 03444
Jackson R. Herring
Affiliation:
National Center for Atmospheric Research, Boulder, Colorado 80307

Abstract

The Lagrangian-history method in turbulence theory (Kraichnan 1977) is modified such that triple moments are expanded in functional powers of the Lagrangian covariance of the symmetric rate-of-strain field instead of the Lagrangian covariance of the velocity field. The simplest approximation which results corresponds to the abridged Lagrangian-history direct-interaction approximation. It is illustrated by application to the Lagrangian properties of a random velocity field whose Eulerian values are frozen in time. Then it is formulated for isotropic Navier-Stokes turbulence. The new approximation is expected to give reduced energy transfer in the dissipation range because the rate of strain along a fluid-element trajectory is statistically stationary in stationary homogeneous turbulence while the derivatives of the Lagrangian velocity with respect to initial position tend to grow and thereby have a longer correlation time. The correlation times of these two entities play corresponding roles in the new and old approximations for energy transfer, respectively.

Type
Research Article
Copyright
© 1978 Cambridge University Press

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References

Fournier, J.-D. & Frisch, U. 1978 Phys. Rev. A 17, 742.
Grant, H. L., Stewart, R. W. & Moilliet, A. 1962 J. Fluid Mech. 12, 241.
Herring, J. 1969 Phys. Fluids 12, 39.
Herring, J. & Kraichnan, R. H. 1978 Submitted to J. Fluid Mech.Google Scholar
Herring, J., Orszag, S., Kraichnan, R. & Fox, D. 1974 J. Fluid Mech. 66, 417.
Kraichnan, R. H. 1965 Phys. Fluids 8, 575.
Kraichnan, R. H. 1966a Phys. Fluids 9, 1728.
Kraichnan, R. H. 1966b Phys. Fluids 9, 1932.
Kraichnan, R. H. 1968a Phys. Fluids 11, 266.
Kraichnan, R. H. 1968b Phys. Fluids 11, 945.
Kraichnan, R. H. 1970a J. Fluid Mech. 41, 189.
Kraichnan, R. H. 1970b Phys. Fluids 13, 22.
Kraichnan, R. H. 1977 J. Fluid Mech. 83, 349.
Orszag, S. 1969 Proc 1968 Symp. Turbulence Fluids & Plasmas, Polytech. Inst. Brooklyn, p. 17.
Orszag, S. & Patterson, G. 1972 Phys. Rev. Lett. 28, 76.