Documents disponibles écrits par cet auteur

Data management of extreme marine and coastal hydro-meteorological events / Pieter H. A. J. M. Van Gelder in Journal of hydraulic research, Vol. 46 extra issue (Mars/Avril 2008) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 46 extra issue (Mars/Avril 2008) . - pp. 191-210 Titre : Data management of extreme marine and coastal hydro-meteorological events Titre original : Gestion de données des événements hydrauliques-météorologiques Type de document : texte imprimé Auteurs : Pieter H. A. J. M. Van Gelder, Auteur ; Cong V. Mai, Auteur ; Wen Wang, Auteur Article en page(s) : pp. 191-210 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : Data  screening  Extreme  value  analysis  Long-memory  study  Seasonality  analysis  Steadiness  test  Trend  analysis Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In statistical extreme value analysis and forecast modeling, data screening and management are necessary steps before fitting a probability distribution to represent adequately the observed data. These methods include trend analysis, steadiness tests, seasonality analysis, and long-memory studies; are critically reviewed and applied to coastal datasets. It was shown that the smaller the timescale of the coastal process, the more likely it tends to be non-stationary. The seasonal variations in the autocorrelation structures are present for all the deseasonalized daily, 1/3-monthly and monthly coastal processes. The investigation of the long-memory phenomenon of coastal processes at different timescales shows that, with the increase of timescale, the intensity of long-memory decreases. Only the daily water level series exhibit a strong long-memory. Comparing the stationary test results and the long-memory test results, these two types of tests are more or less linked, not only in that the test results have similar timescale patterns, but also in that there is a general tendency that the stronger the nonstationarity, the more intense the long-memory. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Data management of extreme marine and coastal hydro-meteorological events = Gestion de données des événements hydrauliques-météorologiques [texte imprimé] / Pieter H. A. J. M. Van Gelder, Auteur ; Cong V. Mai, Auteur ; Wen Wang, Auteur . - pp. 191-210. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 extra issue (Mars/Avril 2008) . - pp. 191-210 Mots-clés : Data  screening  Extreme  value  analysis  Long-memory  study  Seasonality  analysis  Steadiness  test  Trend  analysis Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In statistical extreme value analysis and forecast modeling, data screening and management are necessary steps before fitting a probability distribution to represent adequately the observed data. These methods include trend analysis, steadiness tests, seasonality analysis, and long-memory studies; are critically reviewed and applied to coastal datasets. It was shown that the smaller the timescale of the coastal process, the more likely it tends to be non-stationary. The seasonal variations in the autocorrelation structures are present for all the deseasonalized daily, 1/3-monthly and monthly coastal processes. The investigation of the long-memory phenomenon of coastal processes at different timescales shows that, with the increase of timescale, the intensity of long-memory decreases. Only the daily water level series exhibit a strong long-memory. Comparing the stationary test results and the long-memory test results, these two types of tests are more or less linked, not only in that the test results have similar timescale patterns, but also in that there is a general tendency that the stronger the nonstationarity, the more intense the long-memory. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Simulation of subcooled flow boiling in a micro-channel / Rui Zhuan in International journal of refrigeration, Vol. 34 N° 3 (Mai 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 781-795 Titre : Simulation of subcooled flow boiling in a micro-channel Titre original : Simulation de l'ébullition en écoulement sous-refroidie dans un micro-canal Type de document : texte imprimé Auteurs : Rui Zhuan, Auteur ; Wen Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 781-795 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Simulation  Micro-channel  Subcooling  Boiling  Bubble  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Bubble behavior was simulated to analyze the mechanism of subcooled boiling in a micro-channel. Bubble growth, condensation, and collapse in subcooled boiling, as well as the function of the degree of subcooling, lift-off diameter, heat flux, and mass flux are discussed. The influence of surface tension on interfacial heat transfer is likewise presented. In the calculated results, both onset of nucleate boiling and boiling heat transfer are influenced by micro-channel size. The simulated flow pattern corresponds with some experimental results. Findings on the boiling heat transfer from the simulation were compared with experiments. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002781 [article] Simulation of subcooled flow boiling in a micro-channel = Simulation de l'ébullition en écoulement sous-refroidie dans un micro-canal [texte imprimé] / Rui Zhuan, Auteur ; Wen Wang, Auteur . - 2011 . - pp. 781-795. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 781-795 Mots-clés : Simulation  Micro-channel  Subcooling  Boiling  Bubble  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Bubble behavior was simulated to analyze the mechanism of subcooled boiling in a micro-channel. Bubble growth, condensation, and collapse in subcooled boiling, as well as the function of the degree of subcooling, lift-off diameter, heat flux, and mass flux are discussed. The influence of surface tension on interfacial heat transfer is likewise presented. In the calculated results, both onset of nucleate boiling and boiling heat transfer are influenced by micro-channel size. The simulated flow pattern corresponds with some experimental results. Findings on the boiling heat transfer from the simulation were compared with experiments. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002781

The heat transfer performance of horizontal tube bundles in large falling film evaporators / Yang, Li in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 303-316 Titre : The heat transfer performance of horizontal tube bundles in large falling film evaporators Titre original : Performance en termes de transfert de chaleur des faisceaux de tubes horizontaux dans les évaporateurs à film tombant de grandes dimensions Type de document : texte imprimé Auteurs : Yang, Li, Auteur ; Wen Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 303-316 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Evaporator  Falling  film  Bundle  Modelling-simulation  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of the horizontal heat transfer tube bundles in falling film evaporators in large compression refrigeration systems was investigated with numerical simulation in this paper. Four types of tubes, including plain tubes, and enhanced surface tubes of Turbo-B, Turbo-BII and Turbo-EHP, were employed in the simulation. Some factors, such as tube kind, tube pass arrangement, dry patch area on tube surface, liquid refrigerant flow rate, and number of flooded tubes, were analyzed based on simulated results. In the study, the maldistribution of liquid refrigerant flow caused by the distributor apparatus was discussed, which severely affects the performance of falling film evaporators according to the simulation. Some calculated results were verified by the experiment. These discussions and results can be used to guide the design of falling film evaporators under realistic flow conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000157X [article] The heat transfer performance of horizontal tube bundles in large falling film evaporators = Performance en termes de transfert de chaleur des faisceaux de tubes horizontaux dans les évaporateurs à film tombant de grandes dimensions [texte imprimé] / Yang, Li, Auteur ; Wen Wang, Auteur . - 2011 . - pp. 303-316. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 303-316 Mots-clés : Evaporator  Falling  film  Bundle  Modelling-simulation  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of the horizontal heat transfer tube bundles in falling film evaporators in large compression refrigeration systems was investigated with numerical simulation in this paper. Four types of tubes, including plain tubes, and enhanced surface tubes of Turbo-B, Turbo-BII and Turbo-EHP, were employed in the simulation. Some factors, such as tube kind, tube pass arrangement, dry patch area on tube surface, liquid refrigerant flow rate, and number of flooded tubes, were analyzed based on simulated results. In the study, the maldistribution of liquid refrigerant flow caused by the distributor apparatus was discussed, which severely affects the performance of falling film evaporators according to the simulation. Some calculated results were verified by the experiment. These discussions and results can be used to guide the design of falling film evaporators under realistic flow conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000157X