Toward a high performance and strong resilience wind energy harvester assembly utilizing flow-induced vibration: Role of hysteresis

Fan, Xiantao; Guo, Kai; Wang, Yang

doi:10.1016/j.energy.2022.123921

Cited by 20 publications

(5 citation statements)

References 55 publications

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“…For the particle flow on the vortex center, there are high particle volume fractions. Therefore, the following drag force equation, which considers the effect of void fraction, is adopted [25][26][27]:…”

Section: Discrete Element Methodsmentioning

confidence: 99%

Mixing Transport Mechanism of Three-Phase Particle Flow Based on CFD-DEM Coupling

Chen

Zhao

et al. 2023

Processes

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The mixing transport courses of three-phase particle flows exist in some industrial applications, such as metallurgy material extraction, lithium electric slurry dispersion, and material mixing in the high-end chemical industry. Its mixing transport mechanism is a fluid–structure coupling dynamic issues with intensive shear and nonlinear characteristics, making the real-time prediction of the flow field face challenges. To address the above problem, a bidirectional fluid–structure coupling three-phase particle flow dynamic model is built based on the coupled computational fluid dynamics and discrete element model (CFD-DEM) to explore the mixing transport mechanism. An interphase coupling solution method is utilized to solve the interaction effects of the fluid and particle. Research results illustrate that the proposed method modeling can well reveal the mixing transport mechanism of the three-phase particle flows. Due to the additive effects of stirring speed, stirring blade size, and stirring blade structure, the flow field near the blade has a high-velocity gradient change, while the flow field away from the stirring blade has no significant change. When the particle material settles and accumulates to a certain extent, the particle movement is blocked, and the stirring speed of the particle material near the blade is reduced. The mixing effect of the particle material will be reduced near the wall. It can provide a valuable reference for particle flow transport and pattern identification and support technical support for lithium electric homogenate mixing, chemical extraction, and pharmacy process regulation.

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Section: Discrete Element Methodsmentioning

confidence: 99%

Mixing Transport Mechanism of Three-Phase Particle Flow Based on CFD-DEM Coupling

Chen

Zhao

et al. 2023

Processes

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“…Here is a brief list of such devices: crystal oscillators used as frequency reference, piezotransformers for high frequency voltage changes, microphone and hydrophone sensors, piezoceramic sound and ultrasound emitters, precision positioning systems [157][158][159][160][161]. In recent years, this list has expanded due to significant progress in the development of the energy harvesters (see, for example, [162][163][164][165][166][167], which emphasize the role of nonlinear and hysteresis effects in the functioning and conversion efficiency of such devices).…”

Section: Technical Systemsmentioning

confidence: 99%

The Preisach model of hysteresis: fundamentals and applications

Semenov,

Borzunov,

Meleshenko

et al. 2024

Phys. Scr.

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The Preisach model is a well-known model of hysteresis in the modern nonlinear science. This paper provides an overview of works that are focusing on the study of dynamical systems from various areas (physics, economics, biology), where the Preisach model plays a key role in the formalization of hysteresis dependencies. Here we describe the input-output relations of the classical Preisach operator, its basic properties, methods of constructing the output using the demagnetization function formalism, a generalization of the classical Preisach operator for the case of vector input-output relations. Various generalizations of the model are described here in relation to systems containing ferromagnetic and ferroelectric materials. The main attention we pay to experimental works, where the Preisach model has been used for analytic description of the experimentally observed results. Also, we describe a wide range of the technical applications of the Preisach model in such fields as energy storage devices, systems under piezoelectric effect, models of systems with long-term memory. The properties of the Preisach operator in terms of reaction to stochastic external impacts are described and a generalization of the model for the case of the stochastic threshold numbers of its elementary components is given.

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“…As a crucial method of analyzing boundary layers, Ekman's theories have been extensively applied in oceanography [46][47][48][49][50], meteorology [51], engineering fluid computation [52], and other disciplines. Andersen [53] investigated the dynamic evolution characteristics of the Ekman layer and found the Ekman upwelling flow phenomenon.…”

Section: Pumping Effects Of the Ekman Layermentioning

confidence: 99%

Gravitational Surface Vortex Formation and Suppression Control: A Review from Hydrodynamic Characteristics

Zheng

et al. 2022

Processes

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The energy-conversion stability of hydropower is critical to satisfy the growing demand for electricity. In low-head hydropower plants, a gravitational surface vortex is easily generated, which causes irregular shock vibrations that damage turbine performance and input-flow stability. The gravitational surface vortex is a complex fluid dynamic problem with high nonlinear features. Here, we thoroughly investigate its essential hydrodynamic properties, such as Ekman layer transport, heat/mass transfer, pressure pulsation, and vortex-induced vibration, and we note some significant scientific issues as well as future research directions and opportunities. Our findings show that the turbulent Ekman layer analytical solution and vortex multi-scale modeling technology, the working condition of the vortex across the scale heat/mass transfer mechanism, the high-precision measurement technology for high-speed turbulent vortexes, and the gas–liquid–solid three-phase vortex dynamics model are the main research directions. The vortex-induced vibration transition mechanism of particle flow in complex restricted pipelines, as well as the improvement of signal processing algorithms and a better design of anti-spin/vortex elimination devices, continue to draw attention. The relevant result can offer a helpful reference for fluid-induced vibration detection and provide a technical solution for hydropower energy conversion.

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Toward a high performance and strong resilience wind energy harvester assembly utilizing flow-induced vibration: Role of hysteresis

Cited by 20 publications

References 55 publications

Mixing Transport Mechanism of Three-Phase Particle Flow Based on CFD-DEM Coupling

Mixing Transport Mechanism of Three-Phase Particle Flow Based on CFD-DEM Coupling

The Preisach model of hysteresis: fundamentals and applications

Gravitational Surface Vortex Formation and Suppression Control: A Review from Hydrodynamic Characteristics

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