Unsteady flow and heat transfer in a channel with a built-in tandem of rectangular cylinders

Journal Article · Fri May 10 04:00:00 EDT 1996 · Numerical Heat Transfer. Part A, Applications

DOI:https://doi.org/10.1080/10407789608913809· OSTI ID:250799

Valencia, A ^[1]

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1. Universidad de Chile, Santiago (Chile). Dept. de Ingenieria Mecanica

The incompressible unsteady flow past a channel with a pair of cylinders of rectangular cross section, placed in tandem normal to the flow, is investigated by numerical simulation. The objective is to evaluate the effect of cylinder separation distance, S/H, on the flow behavior and heat transfer on the channel walls, over a range of Reynolds numbers. Above a critical Reynolds number, these flows bifurcate to a time-periodic self-sustained oscillatory state. The results reveal for S/H = 2.0 three distinct flow patterns: steady flow (Re = 200), time-periodic oscillatory state (400 {le} Re {le} 800), and quasi-periodic oscillatory flow (Re = 1,000). For S/H < 2.0 the intercylinder flow consists of a pair of steady counterrotating eddies that do not exchange fluid with the surrounding and unsteady eddies. Eddy shedding is observed only for the downstream cylinder for Re > 600.

• Sponsoring Organization: USDOE
• OSTI ID: 250799
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 6 Vol. 29; ISSN NHAAES; ISSN 1040-7782
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
HEAT EXCHANGERS
HEAT TRANSFER
INCOMPRESSIBLE FLOW
SIMULATION
UNSTEADY FLOW