Numerical study of an electrohydrodynamic plume between a blade injector and a flat plate

Pérez, Alberto T.; Traoré, Philippe; Koulova-Nenova, D.; Romat, H.

doi:10.1109/tdei.2009.4815177

Cited by 20 publications

(22 citation statements)

References 11 publications

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“…We have depicted the computational domain and the boundary conditions in The numerical procedure is based on the integration of the whole system of equations by a finite volume method using a staggered grid and a semi-implicit second order in time and space accurate schemes [25]. All details of the present numerical method can be found in [16].…”

Section: Methodsmentioning

confidence: 99%

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Numerical simulation and PIV experimental analysis of electrohydrodynamic plumes induced by a blade electrode

Traoré¹,

Daaboul²,

Louste³

2010

J. Phys. D: Appl. Phys.

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In this paper a comparative study between numerical and experimental results from particle image velocimetry (PIV) measurements is presented in the case of two-dimensional electrohydrodynamic plumes that arise when a sharp metallic blade, submerged in non-conducting liquids, supports a high electric potential. Experiments and numerical simulations have been conducted in order to compare both the approaches. Very good agreement has been found through velocity profiles and velocity fields which proves the relevance of our numerical model. For high potentials the jet flow issued forth from the blade becomes unsteady and starts to flap on the vertical wall. Some snapshots of the temporal evolution of the isocontours of charge density which is not accessible from experiment are presented thanks to the numerical simulation.

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Section: Methodsmentioning

confidence: 99%

“…But most of the authors started their computations from an assumed velocity field and not from a real resolution of the Navier-Stokes equations [15]. In [16] the appropriate electrodynamics equations coupled with the full Navier-Stokes equations are solved numerically with the help of an efficient finite volume method to study the flow structure of EHD plumes.…”

mentioning

confidence: 99%

Numerical simulation and PIV experimental analysis of electrohydrodynamic plumes induced by a blade electrode

Traoré¹,

Daaboul²,

Louste³

2010

J. Phys. D: Appl. Phys.

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“…Given the nonlinearity of the EHD problem researchers have turned to 'special' numerical treatment where Chicon et al (1997) have used a particle injection scheme, and Vazquez et al (2006Vazquez et al ( , 2008 have used both particle injection schemes and a finite-element-flux-corrected-transport (FE-FCT) method that employs both a low-order and high-order scheme where the low-order scheme includes diffusion so has to avoid solution instability, and the higher-order scheme is utilized in order to provide a more accurate solution (Vazquez et al 2008). More recently, Perez et al (2009) andTraore et al (2010) have used a total variation diminishing (TVD) finitevolume scheme that includes artificial diffusion near the boundary and is nominally second-order. While these numerical methods are suitable for a wide range of EHD parameters, these authors have shown that a conventional globally second-order finite volume scheme can be used to simulate EHD flow quite accurately, so long as the limitations are clearly defined.…”

Section: Introductionmentioning

confidence: 99%

Turbulent three-dimensional dielectric electrohydrodynamic convection between two plates

Kourmatzis

Shrimpton

2012

J. Fluid Mech.

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The fundamental mechanisms responsible for the creation of electrohydrodynamically driven roll structures in free electroconvection between two plates are analysed with reference to traditional Rayleigh-Bénard convection (RBC). Previously available knowledge limited to two dimensions is extended to three-dimensions, and a wide range of electric Reynolds numbers is analysed, extending into a fully inherently three-dimensional turbulent regime. Results reveal that structures appearing in threedimensional electrohydrodynamics (EHD) are similar to those observed for RBC, and while two-dimensional EHD results bear some similarities with the three-dimensional results there are distinct differences. Analysis of two-point correlations and integral length scales show that full three-dimensional electroconvection is more chaotic than in two dimensions and this is also noted by qualitatively observing the roll structures that arise for both low (Re E = 1) and high electric Reynolds numbers (up to Re E = 120). Furthermore, calculations of mean profiles and second-order moments along with energy budgets and spectra have examined the validity of neglecting the fluctuating electric field E i in the Reynolds-averaged EHD equations and provide insight into the generation and transport mechanisms of turbulent EHD. Spectral and spatial data clearly indicate how fluctuating energy is transferred from electrical to hydrodynamic forms, on moving through the domain away from the charging electrode. It is shown that E i is not negligible close to the walls and terms acting as sources and sinks in the turbulent kinetic energy, turbulent scalar flux and turbulent scalar variance equations are examined. Profiles of hydrodynamic terms in the budgets resemble those in the literature for RBC; however there are terms specific to EHD that are significant, indicating that the transfer of energy in EHD is also attributed to further electrodynamic terms and a strong coupling exists between the charge flux and variance, due to the ionic drift term.

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“…Secondly, the system (unlike that with a point electrode) can be used to cool an extended heat source. At last, it is a quite common design of EHDHE, which is used in a number of experimental and simulation works [8,[22][23][24][25]. The geometry of computer model and the boundary conditions for the set of equations are given in Fig.…”

Section: Mathematical and Computer Modelsmentioning

confidence: 99%

“…The lower plane doubles as the grounded electrode and heater simultaneously whereas the upper one is the cooler. It is worth noting that the blade is represented as a realistic surface rather than an injecting line/point at a plane (e.g., like it is in [24,26]). This allows setting the injection charge formation at an area around the tip (e.g., like it is in [13,25]) and thus avoiding the problem with very steep change in space charge density near the injecting point.…”

Section: Mathematical and Computer Modelsmentioning

confidence: 99%

The Dependence of the Efficiency of Electrohydrodynamic Heat Exchanger on the Electric Conductivity of Liquid

Чирков

Rodikova

Stishkov

2017

IEEE Trans. on Ind. Applicat.

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Abstract-Electrohydrodynamic (EHD) flows are of great interest due to their capability of intensifying the heat exchange. However, the electric conductivity of liquid is typically disregarded, and the model of unipolar injection is used. The paper studies the effect of liquid conductivity on the efficiency of EHD heat exchanger with charge formed by injection as well as field-enhanced dissociation. The investigation involved computer simulation of the complete set of EHD equations supplemented with that for the heat transfer. The range of low-voltage conductivity of working liquid, when electroconvection can be used for heat transfer enhancement, was estimated. The EHD heat exchanger based on the field-enhanced dissociation is shown to be very promising for dielectric liquids with heightened conductivity.

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Numerical study of an electrohydrodynamic plume between a blade injector and a flat plate

Cited by 20 publications

References 11 publications

Numerical simulation and PIV experimental analysis of electrohydrodynamic plumes induced by a blade electrode

Numerical simulation and PIV experimental analysis of electrohydrodynamic plumes induced by a blade electrode

Turbulent three-dimensional dielectric electrohydrodynamic convection between two plates

The Dependence of the Efficiency of Electrohydrodynamic Heat Exchanger on the Electric Conductivity of Liquid

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