Pattern variation of the secondary flow in rectangular curved ducts

Kyoji Yamamoto; Ken Kadowaki; Shinichiro Yanase; Yoshito Kaga

doi:10.1299/kikaib.70.2822

Pattern variation of the secondary flow in rectangular curved ducts

Kyoji Yamamoto, Ken Kadowaki, Shinichiro Yanase, Yoshito Kaga

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The flow through a rectangular curved duct is investigated numerically with emphasis on the secondary flow patterns. The non-dimensional curvature of the duct is taken to be 0.02 and the aspect ratios of the duct cross-section are considered to be 0.5, 2, 3 and 4. The calculation covers a wide range of the Dean number. The steady solutions are first calculated and then the linear stability of the solutions is examined. The multiple solutions and the bifurcation of the solutions are obtained. The critical Dean numbers at which the transition of the secondary flow patterns occurs are also obtained.

Original language	English
Pages (from-to)	2822-2829
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	70
Issue number	699
DOIs	https://doi.org/10.1299/kikaib.70.2822
Publication status	Published - Nov 2004

Keywords

Curved Duct Flow
Dean Number
Linear Stability
Rectangular Cross-Section
Secondary Flow

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.70.2822

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T1 - Pattern variation of the secondary flow in rectangular curved ducts

AU - Yamamoto, Kyoji

AU - Kadowaki, Ken

AU - Yanase, Shinichiro

AU - Kaga, Yoshito

PY - 2004/11

Y1 - 2004/11

N2 - The flow through a rectangular curved duct is investigated numerically with emphasis on the secondary flow patterns. The non-dimensional curvature of the duct is taken to be 0.02 and the aspect ratios of the duct cross-section are considered to be 0.5, 2, 3 and 4. The calculation covers a wide range of the Dean number. The steady solutions are first calculated and then the linear stability of the solutions is examined. The multiple solutions and the bifurcation of the solutions are obtained. The critical Dean numbers at which the transition of the secondary flow patterns occurs are also obtained.

AB - The flow through a rectangular curved duct is investigated numerically with emphasis on the secondary flow patterns. The non-dimensional curvature of the duct is taken to be 0.02 and the aspect ratios of the duct cross-section are considered to be 0.5, 2, 3 and 4. The calculation covers a wide range of the Dean number. The steady solutions are first calculated and then the linear stability of the solutions is examined. The multiple solutions and the bifurcation of the solutions are obtained. The critical Dean numbers at which the transition of the secondary flow patterns occurs are also obtained.

KW - Curved Duct Flow

KW - Dean Number

KW - Linear Stability

KW - Rectangular Cross-Section

KW - Secondary Flow

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