Modelling of Secondary Flow Vortex Structures, Hydrodynamic Instability and Associated Heat Transfer in Fluid Flow Through Curved Ducts

Chandratilleke, Tilak; Nadim, Nima; Narayanaswamy, Ramesh

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Authors

Chandratilleke, Tilak

Nadim, Nima

Narayanaswamy, Ramesh

Date

2011

Type

Conference Paper

Metadata

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Citation

Chandratilleke, Tilak T. and Nadim, Nima and Narayanaswamy, Ramesh. 2011. Modelling of Secondary Flow Vortex Structures, Hydrodynamic Instability and Associated Heat Transfer in Fluid Flow Through Curved Ducts, in C. Balaji and R.M. Manglik (ed), 21st National and 10th ISHMT-ASME Heat and Mass Transfer Conference, Dec 27-30 2011, pp. 1-6. Madras: Indian Institute of Technology.

Source Title

Proceedings of the 21st National and 10th ISHMT-ASME Heat and Mass Transfer Conference

Source Conference

21st National and 10th ISHMT-ASME Heat and Mass Transfer Conference

School

Department of Mechanical Engineering

URI

http://hdl.handle.net/20.500.11937/18576

Collection

Curtin Research Publications

Abstract

This paper presents a numerical study that examines the secondary flow and thermal behaviour in curved rectangular ducts. For developing laminar flow through these ducts, a novel 3-dimensional model based on vortex structures is formulated and a parametric influence is examined using the contours of helicity for a range of fluid flow rates, duct aspect ratios and wall heat fluxes. The flow and geometrical conditions leading to hydrodynamic instability are identified. Results are validated against experimental data. The study presents a novel method for determining the onset of hydrodynamic instability.