Unsteady Three-Dimensional Behavior of Natural Convection in Horizontal Annulus, (III) Validity of Direct Numerical Simulation of Turbulent Natural Convection

Kouji Morita, Youichirou Nakamura, Noboru Taniguchi, Kenji Fukuda, Shu Hasegawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Direct numerical simulation using the three-dimensional and time-dependent finite difference scheme which have been reported in the previous paper is performed for turbulent natural convection in a horizontal concentric annulus. Numerical results are obtained for the Rayleigh number based on the gap width from 1.0 × 106 to 1.72 × 107. To verify the validity of the present scheme, numerical results dealt with statistically are compared with other experimental data and numerical solutions and the effect of grid size on spatial resolution capability is investigated. It is shown that time-averaged quantities deduced from appropriate spatial resolution are in good agreement with experimental results, whereas turbulence quantities are excessively estimated when spatial resolution is insufficient.

Original languageEnglish
Pages (from-to)719-727
Number of pages9
JournalJournal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan
Volume32
Issue number7
DOIs
Publication statusPublished - 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering

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