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

    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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