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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v17.i4.40
pages 321-332

NUMERICAL ANALYSIS AND FLOW VISUALIZATION OF SWIRL-TYPE MIXED CONVECTION IN A HORIZONTAL SQUARE DUCT

Koichi Ichimiya
Department Research, Interdisciplinary Graduate School of Engineering, University of Yamanashi, 4 Takeda, Kofu, Yamanashi, 400-8511, Japan
Koji Toriyama
Graduate School of Medicine and Engineering, University of Yamanashi, Takeda 4-3-11, Kofu, Yamanashi 400-8511, Japan
Masakazu Kaneko
Mitsubishi Electric Corporation, Oshika-3, Suruga-ku, Shizuoka-shi, Shizuoka 422-8528, Japan

RÉSUMÉ

This paper describes the behavior of the swirl flow of mixed convection in a horizontal square duct (side length: L) with heated and cooled side walls. The flow behavior was visualized by the dye-injection method and numerical analysis. The working fluid was water. In the numerical analysis, the governing equations were solved using the SIMPLE procedure and QUICK scheme through the control volume. The Reynolds number Re at the inlet was 100 and the Richardson numbers Ri (= Gr/Re2), where Gr is the Grashof number, ranged from 16 to 180. Results show that the swirl flow was activated with increase of Ri. The pitch length of the swirl flow, P, decreased with an increase of Ri, and the dimensionless pitch length, P/L, was expressed as a power function of Ri.


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