The Experts below are selected from a list of 25809 Experts worldwide ranked by ideXlab platform
A Berlemont - One of the best experts on this subject based on the ideXlab platform.
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coupling level set vof ghost fluid methods validation and application to 3d simulation of the primary break up of a Liquid Jet
International Journal of Multiphase Flow, 2007Co-Authors: Thibault Menard, Sebastien Tanguy, A BerlemontAbstract:Numerical simulations are carried out to describe the dense zone of a spray where very little information is available, either from experimental or theoretical approaches. Interface tracking is ensured by the level set method and the ghost fluid method (GFM) is used to capture accurately sharp discontinuities for pressure, density and viscosity. The level set method is coupled with the VOF method for mass conservation. The level set-VOF coupling is validated on 2D and 3D test cases. The level set-ghost fluid method is applied to the Rayleigh instability of a Liquid Jet. Preliminary results are then presented for 3D simulation of the primary break-up of a turbulent Liquid Jet with the level set-VOF-ghost fluid method. (C) 2006 Published by Elsevier Ltd.
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coupling level set vof ghost fluid methods validation and application to 3d simulation of the primary break up of a Liquid Jet
International Journal of Multiphase Flow, 2007Co-Authors: Thibault Menard, Sebastien Tanguy, A BerlemontAbstract:Abstract Numerical simulations are carried out to describe the dense zone of a spray where very little information is available, either from experimental or theoretical approaches. Interface tracking is ensured by the level set method and the ghost fluid method (GFM) is used to capture accurately sharp discontinuities for pressure, density and viscosity. The level set method is coupled with the VOF method for mass conservation. The level set–VOF coupling is validated on 2D and 3D test cases. The level set–ghost fluid method is applied to the Rayleigh instability of a Liquid Jet. Preliminary results are then presented for 3D simulation of the primary break-up of a turbulent Liquid Jet with the level set–VOF–ghost fluid method.
Thibault Menard - One of the best experts on this subject based on the ideXlab platform.
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coupling level set vof ghost fluid methods validation and application to 3d simulation of the primary break up of a Liquid Jet
International Journal of Multiphase Flow, 2007Co-Authors: Thibault Menard, Sebastien Tanguy, A BerlemontAbstract:Numerical simulations are carried out to describe the dense zone of a spray where very little information is available, either from experimental or theoretical approaches. Interface tracking is ensured by the level set method and the ghost fluid method (GFM) is used to capture accurately sharp discontinuities for pressure, density and viscosity. The level set method is coupled with the VOF method for mass conservation. The level set-VOF coupling is validated on 2D and 3D test cases. The level set-ghost fluid method is applied to the Rayleigh instability of a Liquid Jet. Preliminary results are then presented for 3D simulation of the primary break-up of a turbulent Liquid Jet with the level set-VOF-ghost fluid method. (C) 2006 Published by Elsevier Ltd.
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coupling level set vof ghost fluid methods validation and application to 3d simulation of the primary break up of a Liquid Jet
International Journal of Multiphase Flow, 2007Co-Authors: Thibault Menard, Sebastien Tanguy, A BerlemontAbstract:Abstract Numerical simulations are carried out to describe the dense zone of a spray where very little information is available, either from experimental or theoretical approaches. Interface tracking is ensured by the level set method and the ghost fluid method (GFM) is used to capture accurately sharp discontinuities for pressure, density and viscosity. The level set method is coupled with the VOF method for mass conservation. The level set–VOF coupling is validated on 2D and 3D test cases. The level set–ghost fluid method is applied to the Rayleigh instability of a Liquid Jet. Preliminary results are then presented for 3D simulation of the primary break-up of a turbulent Liquid Jet with the level set–VOF–ghost fluid method.
Akira Kariyasaki - One of the best experts on this subject based on the ideXlab platform.
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behavior of a single coherent gas bubble chain and surrounding Liquid Jet flow structure
Chemical Engineering Science, 2005Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira KariyasakiAbstract:Abstract The motion of a single nitrogen gas bubble chain and the structure of water flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water flow called “Liquid Jet” were observed near the nozzle. The direction of Liquid Jet flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and Liquid Jet by applying the conservation of Liquid momentum.
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behavior of a single coherent gas bubble chain and surrounding Liquid Jet flow structure
Chemical Engineering Science, 2005Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira KariyasakiAbstract:Abstract The motion of a single nitrogen gas bubble chain and the structure of water flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water flow called “Liquid Jet” were observed near the nozzle. The direction of Liquid Jet flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and Liquid Jet by applying the conservation of Liquid momentum.
Martine Baelmans - One of the best experts on this subject based on the ideXlab platform.
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experimental characterization and model validation of Liquid Jet impingement cooling using a high spatial resolution and programmable thermal test chip
Applied Thermal Engineering, 2019Co-Authors: Tiwei Wei, Herman Oprins, Vladimir Cherman, Eric Beyne, G. Van Der Plas, I De Wolf, Martine BaelmansAbstract:Abstract High efficiency direct Liquid Jet impingement cooling with locally distributed outlets is very promising in high power electronic devices. In order to elucidate the flow-thermal interaction for micro-scale Jet impingement cooling, sensitive temperature measurements with high spatial and temporal resolution are required. In this work, a programmable thermal test chip with 832 heater cells with 75% heater uniformity and 32 × 32 array of temperature sensors is introduced. The detailed measured temperature maps for different power dissipation patterns allow the in-depth study of the thermal performance of Liquid Jet impingement coolers and the detailed experimental validation of complex CFD models. The modeling and measurement study is applied to two Jet impingement cooling implementations: (1) a single Jet cooler with a 2 mm diameter nozzle, and (2) a multi-Jet cooler with a 4 × 4 array of 500 µm inlet nozzles and distributed outlet nozzles. For both cooler configurations, the temperature measurements and CFD modeling results are investigated and compared for uniform and hot spot power dissipation patterns.
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3D Printed Liquid Jet Impingement Cooler: Demonstration, Opportunities and Challenges
2018 IEEE 68th Electronic Components and Technology Conference (ECTC), 2018Co-Authors: Tiwei Wei, Ingrid De Wolf, Herman Oprins, Vladimir Cherman, Eric Beyne, Martine BaelmansAbstract:Liquid Jet impingement cooling is a very efficient cooling technology for high performance devices. Previous studies demonstrated that polymers can be used as a cost effective alternative for Si for the fabrication of impingement coolers. The recent developments in additive manufacturing or 3D printing technology enable the potential to fabricate low cost polymer coolers with complex internal channels. In this paper, the use of 3D printing is discussed for the fabrication of a chip level polymer impingement cooler. The paper presents the cooler design, the manufacturability aspects and the characterization of several 3D printed coolers with different nozzles arrays. The challenges and opportunities for the use of 3D printing for this applications are discussed. A methodology to provide design guidelines for 3D printed Liquid impingement Jet coolers is elaborated.
Sebastien Tanguy - One of the best experts on this subject based on the ideXlab platform.
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coupling level set vof ghost fluid methods validation and application to 3d simulation of the primary break up of a Liquid Jet
International Journal of Multiphase Flow, 2007Co-Authors: Thibault Menard, Sebastien Tanguy, A BerlemontAbstract:Numerical simulations are carried out to describe the dense zone of a spray where very little information is available, either from experimental or theoretical approaches. Interface tracking is ensured by the level set method and the ghost fluid method (GFM) is used to capture accurately sharp discontinuities for pressure, density and viscosity. The level set method is coupled with the VOF method for mass conservation. The level set-VOF coupling is validated on 2D and 3D test cases. The level set-ghost fluid method is applied to the Rayleigh instability of a Liquid Jet. Preliminary results are then presented for 3D simulation of the primary break-up of a turbulent Liquid Jet with the level set-VOF-ghost fluid method. (C) 2006 Published by Elsevier Ltd.
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coupling level set vof ghost fluid methods validation and application to 3d simulation of the primary break up of a Liquid Jet
International Journal of Multiphase Flow, 2007Co-Authors: Thibault Menard, Sebastien Tanguy, A BerlemontAbstract:Abstract Numerical simulations are carried out to describe the dense zone of a spray where very little information is available, either from experimental or theoretical approaches. Interface tracking is ensured by the level set method and the ghost fluid method (GFM) is used to capture accurately sharp discontinuities for pressure, density and viscosity. The level set method is coupled with the VOF method for mass conservation. The level set–VOF coupling is validated on 2D and 3D test cases. The level set–ghost fluid method is applied to the Rayleigh instability of a Liquid Jet. Preliminary results are then presented for 3D simulation of the primary break-up of a turbulent Liquid Jet with the level set–VOF–ghost fluid method.
