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Electrical Capacitance Tomography - A Perspective / Q. Marashdeh in Industrial & engineering chemistry research, Vol. 47 N°10 (Mai 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3708-3719 Titre : Electrical Capacitance Tomography - A Perspective Type de document : texte imprimé Auteurs : Q. Marashdeh, Auteur ; L.-S. Fan, Auteur ; W. Warsito, Auteur Année de publication : 2008 Article en page(s) : p. 3708-3719 Langues : Anglais (eng) Mots-clés : Electrical  capacitance  tomography  (ECT) Résumé : This article describes the recent progress in research and development on electrical capacitance tomography (ECT). Specifically, the article highlights several aspects of ECT including the electrical capacitance volume tomography (ECVT), 3D sensor design, 3D neural network multicriterion image reconstruction technique (3D-NN-MOIRT), multimodal imaging based on ECT and ECVT sensors, static-charge effects and the scheme of their elimination in the ECT image reconstruction, and multiphase flow imaging applications. The multimodal capability that enables permittivity and conductivity imaging to be simultaneously conducted is illustrated. The simulation and experimental results are presented to provide quantitative and/or qualitative assessment of the significance of various ECT techniques. The employment of ECVT in conjunction with using electrical capacitance based imaging sensors is shown to represent a favorable tool for industrial multiphase flow imaging. En ligne : https://pubs.acs.org/doi/abs/10.1021/ie0713590 [article] Electrical Capacitance Tomography - A Perspective [texte imprimé] / Q. Marashdeh, Auteur ; L.-S. Fan, Auteur ; W. Warsito, Auteur . - 2008 . - p. 3708-3719. Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3708-3719 Mots-clés : Electrical  capacitance  tomography  (ECT) Résumé : This article describes the recent progress in research and development on electrical capacitance tomography (ECT). Specifically, the article highlights several aspects of ECT including the electrical capacitance volume tomography (ECVT), 3D sensor design, 3D neural network multicriterion image reconstruction technique (3D-NN-MOIRT), multimodal imaging based on ECT and ECVT sensors, static-charge effects and the scheme of their elimination in the ECT image reconstruction, and multiphase flow imaging applications. The multimodal capability that enables permittivity and conductivity imaging to be simultaneously conducted is illustrated. The simulation and experimental results are presented to provide quantitative and/or qualitative assessment of the significance of various ECT techniques. The employment of ECVT in conjunction with using electrical capacitance based imaging sensors is shown to represent a favorable tool for industrial multiphase flow imaging. En ligne : https://pubs.acs.org/doi/abs/10.1021/ie0713590

Experimental and numerical studies of water droplet impact on a porous surface in the film-Boiling regime / Zhao Yu in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9174–9182 Titre : Experimental and numerical studies of water droplet impact on a porous surface in the film-Boiling regime Type de document : texte imprimé Auteurs : Zhao Yu, Auteur ; Wang, Fei, Auteur ; L.-S. Fan, Auteur Année de publication : 2009 Article en page(s) : p. 9174–9182 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Experimental  and  Numerical  Studies  Water  Droplet  Film-Boiling  Regime Résumé : An experimental and numerical study of the water droplet in collision with a porous surface in the film-boiling regime is reported. The porous substrate with a porosity of 34% and pore size of 76 nm is heated to 300 °C, and the motion of the droplet is recorded by a high-speed digital camera. A new three-dimensional (3-D) numerical model is developed to account for the transport phenomenon both inside and outside the porous media, by coupling the flow field with the heat and mass transfer process. The vapor layer model is used as a subgrid model to calculate the induced vapor pressure in the narrow region between the droplet and the surface. The vapor mass transfer is modeled considering the vapor generation and transport mechanisms in different domains. Direct numerical simulation is performed under the same conditions as the experiment, and the simulation results for the droplet behavior are in good agreement with the experimental results. The collision of a water droplet on the porous surface shows similar features to those on nonporous surfaces in the film-boiling regime, probably because of the small pore size of the material used in the current study. However, the droplet has a longer residence time, and it also seems to be less stable on the porous surface. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800479r [article] Experimental and numerical studies of water droplet impact on a porous surface in the film-Boiling regime [texte imprimé] / Zhao Yu, Auteur ; Wang, Fei, Auteur ; L.-S. Fan, Auteur . - 2009 . - p. 9174–9182. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9174–9182 Mots-clés : Experimental  and  Numerical  Studies  Water  Droplet  Film-Boiling  Regime Résumé : An experimental and numerical study of the water droplet in collision with a porous surface in the film-boiling regime is reported. The porous substrate with a porosity of 34% and pore size of 76 nm is heated to 300 °C, and the motion of the droplet is recorded by a high-speed digital camera. A new three-dimensional (3-D) numerical model is developed to account for the transport phenomenon both inside and outside the porous media, by coupling the flow field with the heat and mass transfer process. The vapor layer model is used as a subgrid model to calculate the induced vapor pressure in the narrow region between the droplet and the surface. The vapor mass transfer is modeled considering the vapor generation and transport mechanisms in different domains. Direct numerical simulation is performed under the same conditions as the experiment, and the simulation results for the droplet behavior are in good agreement with the experimental results. The collision of a water droplet on the porous surface shows similar features to those on nonporous surfaces in the film-boiling regime, probably because of the small pore size of the material used in the current study. However, the droplet has a longer residence time, and it also seems to be less stable on the porous surface. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800479r