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A transformation for the energy-transfer term in isotropic turbulence

Published online by Cambridge University Press:  21 April 2006

L. Crocco  and
P. Orlandi
L. Crocco
Affiliation:
Via Annia 16, 00184 Roma
P. Orlandi
Affiliation:
Dipartimento di Meccanica e Aeronautica, Università di Roma, La Sapienza, Via Eudossiana, 16 00184 Roma
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Abstract

The application of a particular transformation to the triadic integral results in an expression having the following advantages: (a) it satisfies global energy conservation in an evident fashion, independently of the accuracy of the energy-spectrum calculations; (b) it allows an economy of computational time; (c) it shows certain symmetries in the behaviour of non-local interactions; (d) it provides, for the non-local interactions contribution to the transfer function, an expression which is simpler and more compact than those existing, in spite of being more nearly complete; (e) finally the calculated energy-transfer distribution is in good agreement with the experimental findings through a very large range of Rλ.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 161 , December 1985 , pp. 405 - 424
Copyright
© 1985 Cambridge University Press

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