Journal ArticleDOI
Effect of Top Wall Configuration on Unsteady Flow and Heat Transfer Characteristics of Sinusoidal Wavy Channels
S. Harikrishnan,Shaligram Tiwari +1 more
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In this paper, the influence of top wall confinement on unsteady flow and heat transfer characteristics of sinusoidal wavy lines was investigated. But the results were limited to three dimensions.Abstract:
In the present work, three-dimensional numerical investigations are carried out to study the influence of top wall confinement on unsteady flow and heat transfer characteristics of sinusoidal wavy ...read more
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Onset of unsteady flow in wavy walled channels at low Reynolds number
TL;DR: In this article, the authors examined the development of an unsteady laminar flow of a Newtonian fluid in a channel with sinusoidal walls, where the flow is driven by a constant pressure gradient.
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Flow transition in periodically fully developed wavy channels
TL;DR: In this paper, numerical investigations have been performed to study the flow transition mechanism in wavy channels using finite volume-based open source field operation and manipulation, and two different wavy channel configurations are chosen, which represent two different flow destabilization mechanisms, viz., Kelvin-Helmholtz and centrifugal instabilities.
References
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Highly resolved large-eddy simulation of separated flow in a channel with streamwise periodic constrictions
TL;DR: In this article, a large-eddy simulation is used to investigate the mean and turbulence properties of a separated flow in a channel constricted by periodically distributed hill-shaped protrusions on one wall.
Journal ArticleDOI
Convective heat transfer in periodic wavy passages
G. Wang,Surya Pratap Vanka +1 more
TL;DR: In this article, the authors studied the rate of heat transfer for flow through a periodic array of wavy passages with an accurate numerical scheme, and observed that self-sustained oscillations lead to the destabilization of laminar thermal boundary layers, replenish the nearwall fluid with the fluid in the core region, and thus provide a natural mechanism of heat and mass transfer enhancement.
Journal ArticleDOI
Flow characteristics in a channel with symmetric wavy wall for steady flow.
TL;DR: In this article, the authors investigated flow characteristics in a channel with a symmetric wavy wall and showed that the variation of pressure drop and wall shear stress with the Reynolds number was elucidated by the behavior of the circulated vortex formed at the diverging cross section of the channel.
Journal ArticleDOI
Transition to chaos in converging–diverging channel flows: Ruelle–Takens–Newhouse scenario
TL;DR: In this article, a simulation of the transition from laminar to chaotic flow in converging-diverging channels is presented, where the chaotic flow regime is reached after a sequence of successive supercritical Hopf bifurcations to periodic, quasiperiodic, and chaotic self-sustained flow regimes.
Journal ArticleDOI
Sinusoidal wavy channels with Taylor-Goertler vortices
TL;DR: In this paper, a sinusoidal wavy duct with constant wavelength λ/a, amplitude of the wavy wall a = 1.825 mm, duct width B = 150 mm, and duct length L = 400 mm for various duct heights s and a range of Reynolds numbers.
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