A two‐dimensional numerical procedure for a three dimensional internal flow through a complex passage with a small depth (its application to numerical analysis of fluidic oscillators)

A. Nakayama (Department of Mechanical Engineering, Shizuoka University, Hamamatsu, Japan)
F. Kuwahara (Department of Mechanical Engineering, Shizuoka University, Hamamatsu, Japan)
Y. Kamiya (Department of Mechanical Engineering, Shizuoka University, Hamamatsu, Japan)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Publication date: 1 December 2005

Abstract

Purpose

To introduce an efficient two‐dimensional numerical procedure for a three‐dimensional internal flow through a complex passage with a small depth, in which the viscous effects from upper and lower walls are significant.

Design/methodology/approach

A set of two‐dimensional governing equations has been derived by integrating the full three‐dimensional Navier‐Stokes equations over the depth. Then, this set of the governing equations has been discretized using a finite volume method. Simple algorithm and quick scheme are used to solve the resulting discretized equations.

Findings

A numerical experiment conducted to investigate the oscillation mechanism of a feedback fluidic oscillator reveals that the feedback passage plays an important role of transmitting the pressure rise to the control port, which triggers the jet stream to deflect towards the opposite side wall in the reaction region. Comparison of the prediction and experiment substantiates the validity of the present numerical procedure.

Originality/value

The two‐dimensional numerical procedure, proposed in this study, will be used by researchers and practitioners to investigate various kinds of complex passages with a small depth. Especially, those who are interested in fluidic devices may find it extremely convenient to conduct numerical experiments.

Keywords

Citation

Nakayama, A., Kuwahara, F. and Kamiya, Y. (2005), "A two‐dimensional numerical procedure for a three dimensional internal flow through a complex passage with a small depth (its application to numerical analysis of fluidic oscillators)", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 15 No. 8, pp. 863-871. https://doi.org/10.1108/09615530510625129

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Publisher

:

Emerald Group Publishing Limited

Copyright © 2005, Emerald Group Publishing Limited

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