Documents disponibles écrits par cet auteur

Analysis of reynolds number effects on bridge deck sections by the PSE method / Suzhe Yang in European journal of environmental and civil engineering, Vol. 15 N° 1 (Janvier 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 1 (Janvier 2011) . - pp. 99-124 Titre : Analysis of reynolds number effects on bridge deck sections by the PSE method Type de document : texte imprimé Auteurs : Suzhe Yang, Auteur ; Christian Crémona, Auteur ; Zhiyong Zhou, Auteur Année de publication : 2011 Article en page(s) : pp. 99-124 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : PSE  Vortex  methods  Reynolds  Strouhal  Bridge  deck  cross-sections Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Reynolds numbers play an important role in fluid dynamics, because flow separations and reattachments are often Reynolds-number dependent, even if the bodies have sharp edges. To satisfy Reynolds scaling in experiments, the model scale can be very large. Computational fluid dynamics (CFD) provides an interesting alternative to wind tunnel tests, especially when Reynolds effects have to be assessed for a design stage. In this paper, the particle strength exchange (PSE) of vortex methods is introduced for assessing Reynolds number effects on bridge deck cross-sections. For this purpose, this study analyses how the aerodynamic forces of two different bridges sections are influenced by these effects. The computation results with PSE are compared with wind tunnel tests. The relation between Strouhal numbers and Reynolds numbers are also analyzed and compared with experimental results. All the results show that the particle strength exchange method can be efficiently used to calculate Reynolds effects on 2-dimensional bridge deck sections. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=15666 [article] Analysis of reynolds number effects on bridge deck sections by the PSE method [texte imprimé] / Suzhe Yang, Auteur ; Christian Crémona, Auteur ; Zhiyong Zhou, Auteur . - 2011 . - pp. 99-124. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 1 (Janvier 2011) . - pp. 99-124 Mots-clés : PSE  Vortex  methods  Reynolds  Strouhal  Bridge  deck  cross-sections Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Reynolds numbers play an important role in fluid dynamics, because flow separations and reattachments are often Reynolds-number dependent, even if the bodies have sharp edges. To satisfy Reynolds scaling in experiments, the model scale can be very large. Computational fluid dynamics (CFD) provides an interesting alternative to wind tunnel tests, especially when Reynolds effects have to be assessed for a design stage. In this paper, the particle strength exchange (PSE) of vortex methods is introduced for assessing Reynolds number effects on bridge deck cross-sections. For this purpose, this study analyses how the aerodynamic forces of two different bridges sections are influenced by these effects. The computation results with PSE are compared with wind tunnel tests. The relation between Strouhal numbers and Reynolds numbers are also analyzed and compared with experimental results. All the results show that the particle strength exchange method can be efficiently used to calculate Reynolds effects on 2-dimensional bridge deck sections. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=15666

Recovery of lithium using tributyl phosphate in methyl isobutyl ketone and FeCl3 / Zhiyong Zhou in Industrial & engineering chemistry research, Vol. 51 N° 39 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12926-12932 Titre : Recovery of lithium using tributyl phosphate in methyl isobutyl ketone and FeCl3 Type de document : texte imprimé Auteurs : Zhiyong Zhou, Auteur ; Wei Qin, Auteur ; Shengke Liang, Auteur Année de publication : 2012 Article en page(s) : pp. 12926-12932 Note générale : Industrial chemsitry Langues : Anglais (eng) Mots-clés : Lithium  Phosphate Résumé : Lithium recovery from salt-lake brines was explored using the extraction equilibria of lithium with tributyl phosphate (TBP) in methyl isobutyl ketone (MIBK), with FeCl3 coextractant, for various volume concentrations of TBP, molar ratios of Fe to Li, and volume ratios of the organic to aqueous phases. Washing and stripping equilibria of magnesium and lithium ions with HCl, NH4Cl, and LiCl/HCl and NH4Cl/HCl combinations were investigated. The extraction of lithium ions from salt-lake brines was successful. NH4Cl was a suitable washing agent for magnesium ions but not for stripping lithium ions into the aqueous phase. HCl can wash magnesium ions and strip lithium ions but corrodes equipment. The LiCl/HCl and NH4Cl/HCl combinations reduced equipment corrosion and washed and stripped magnesium and lithium ions, respectively, at appropriate volume ratios. MIBK loss was reduced using high-salinity solutions and large volume ratios during extraction and adjusting the volume ratio and overall chloride-ion concentration during washing/stripping. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3015236 [article] Recovery of lithium using tributyl phosphate in methyl isobutyl ketone and FeCl3 [texte imprimé] / Zhiyong Zhou, Auteur ; Wei Qin, Auteur ; Shengke Liang, Auteur . - 2012 . - pp. 12926-12932. Industrial chemsitry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12926-12932 Mots-clés : Lithium  Phosphate Résumé : Lithium recovery from salt-lake brines was explored using the extraction equilibria of lithium with tributyl phosphate (TBP) in methyl isobutyl ketone (MIBK), with FeCl3 coextractant, for various volume concentrations of TBP, molar ratios of Fe to Li, and volume ratios of the organic to aqueous phases. Washing and stripping equilibria of magnesium and lithium ions with HCl, NH4Cl, and LiCl/HCl and NH4Cl/HCl combinations were investigated. The extraction of lithium ions from salt-lake brines was successful. NH4Cl was a suitable washing agent for magnesium ions but not for stripping lithium ions into the aqueous phase. HCl can wash magnesium ions and strip lithium ions but corrodes equipment. The LiCl/HCl and NH4Cl/HCl combinations reduced equipment corrosion and washed and stripped magnesium and lithium ions, respectively, at appropriate volume ratios. MIBK loss was reduced using high-salinity solutions and large volume ratios during extraction and adjusting the volume ratio and overall chloride-ion concentration during washing/stripping. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3015236