Title

On the application of direct-interaction approximation to the turbulent convection problem

Authors

Authors

B. K. Shivamoggi

Comments

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Abbreviated Journal Title

Physica A

Keywords

turbulent flows; convection; SPHERICAL MODEL; Physics, Multidisciplinary

Abstract

In this paper, we seek to clarify some issues associated with the application of the direct-interaction approximation (DIA) to the turbulent-convection problem. The small-Prandtl number and the large-Prandtl number regimes are investigated separately. The DIA is confirmed to lead to some unphysical features in the Pr much less than 1 regime. However, in the Pr much greater than 1 regime where the perturbative treatment is valid, the unphysical features of the DIA formulation are shown to be actually artifacts of the perturbative aspect itself and the renormalization added on in the DIA does not change this very much. (C) 2000 Elsevier Science B.V. All rights reserved.

Journal Title

Physica A

Volume

286

Issue/Number

3-4

Publication Date

1-1-2000

Document Type

Article

Language

English

First Page

447

Last Page

456

WOS Identifier

WOS:000089920100004

ISSN

0378-4371

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