Resonant Thermal Convections in a Square Cavity Induced by Heat-Flux Vibration on the Bottom Wall

Ishida, Hideshi; Takagi, Yuuki; Kin, Noriaki; Yoshimura, Hideaki; Kawahara, Genta

doi:10.1080/10407782.2010.490445

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…In general, resonance is harmful and can cause significant deformation and dynamic stress in mechanical and structural systems, even leading to destructive accidents. Some resonance phenomena have been observed in the study of heat transfer process under vibration conditions (Paolucci and Chenoweth, 1989;Ishida et al, 2010). Compared with the situation without vibration, HTC was increased 50% when the vibration frequency was close to the resonant natural frequency (Forbes et al, 1970;Gershuni and Zhukhovitskii, 1986).…”

Section: Resonant Effectmentioning

confidence: 99%

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Zhao,

Wu,

Dang

2023

Front. Energy Res.

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Pool boiling in porous media has been applied in various thermal management systems by using latent heat and increasing the heat transfer area and thermal conduction path to improve the heat transfer performance. In mechanical equipment, vibration is an inevitable problem due to reasons such as engine operation and high-speed relative motion between transmission system components, which causes the system components to be affected by vibration forces or vibration accelerations. This study focuses on a review of published articles about the effects of mechanical vibration on the characteristics of boiling process in porous media by two aspects: heat transfer performance and bubble dynamics. Heat transfer coefficient (HTC) and critical heat flux are two main parameters used to measure the boiling heat transfer characteristics of porous media. For bubble dynamics investigations, properties such as migration, fragment, coalescence, departure diameter and frequency are the focus of research attention. Different mechanical vibration parameters, i.e., direction, frequency, and amplitude, will have different effects on the above characteristics. It is worth mentioning that the greatest influence occurs under resonance conditions, and this has been verified through experimental and simulation calculations. This review highlights the importance of considering mechanical vibrations in the design and optimization of porous media systems for efficient heat transfer applications. Further research is warranted to explore the detailed mechanisms and optimize the vibration parameters for enhanced heat transfer performance in thermal management systems using porous media.

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Section: Resonant Effectmentioning

confidence: 99%

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Zhao,

Wu,

Dang

2023

Front. Energy Res.

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“…The normalized governing equations of a Boussinesq fluid are composed of vorticity and temperature equations, in conjunction with a definition equation for vorticity, which behaves like a holonomic constraint [33,43]. In this study these equations are discretized by finite difference method, expressed by the vorticities and temperatures defined on the above-mentioned inner lattice points with the aid of the boundary conditions.…”

Section: A Sample Vector Field: a Thermal Convectionmentioning

confidence: 99%

Global, nonparametric, noniterative optimization of time-averaged quantities under small, time-varying forcing: An application to a thermal convection field

Ishida

Ihara

Okema

et al. 2019

Numerical Heat Transfer, Part B: Fundamentals

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This study demonstrates a global, non-parametric, non-iterative optimization of time-mean value of a kind of index vibrated by time-varying forcing. It is based on the fact that the (steady) forced vibration of non-autonomous ordinary differential equation systems is well approximated by an analytical solution when the amplitude of forcing is sufficiently small and its base state without forcing is stable and steady. It is applied to optimize a time-averaged heat-transfer rate on a two-dimensional thermal convection field in a square cavity with horizontal temperature difference, and the globally optimal way of vibrational forcing, i.e. the globally optimal, spatial distribution of vibrational heat and vorticity sources, is first obtained. The maximized vibrational thermal convection corresponds well to the state of internal gravity wave resonance. In contrast, the minimized thermal convection is weak, keeping the boundary layers on both sidewalls thick.

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“…They observed that the best heat transfer rate is comprehended when the dimensionless frequency (Strouhal number) is close to unity and also heat transfer is enhanced in comparison to the steady state case. The effects of the oscillation on the heat transfer and fluid flow have been investigated by the other researchers [13][14][15][16][17][18]. Khanafer et al [19] investigated numerically, unsteady laminar mixed convection heat transfer in an oscillating lid-driven cavity to study the effects of Reynolds number, Grashof number and oscillating frequency on heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement of mixed convection in a square cavity with inlet and outlet ports due to oscillation of incoming flow

Sourtiji

Hosseinizadeh

Gorji-Bandpy

et al. 2011

International Communications in Heat and Mass Transfer

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Resonant Thermal Convections in a Square Cavity Induced by Heat-Flux Vibration on the Bottom Wall

Cited by 12 publications

References 24 publications

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Global, nonparametric, noniterative optimization of time-averaged quantities under small, time-varying forcing: An application to a thermal convection field

Heat transfer enhancement of mixed convection in a square cavity with inlet and outlet ports due to oscillation of incoming flow

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