Hydraulic research and its impact on the environment PDF Download

Author: International Association for Hydraulic Research
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 402

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Author: International Association for Hydraulic Research
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 742

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Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 944

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Contains proceedings of symposia held by the Association.

Author: Maurice Bouvard (hydraulicien).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Il semblait initialement tres problematique de realiser un ecoulement turbulent en milieu confine. La plaque oscillante percee de trous, a permis de resoudre le probleme dans des conditions qui, d'apres le resultat des mesures, sont tres satisfaisantes. On retrouve les proprietes classiques de l'ecoulement turbulent derriere grille avec une precision surprenante. En plus, les deux types de turbulence ne sont pas identiques: l'ecart par rapport a l'isotropie et surtout par rapport a l'homogeneite est evident dans le cas realise ici. Les parametres de base de la turbulence obtenue dependent des parametres du systeme generateur. En faisant varier ceux-ci, on pourrait modifier les variables de la turbulence, notamment le nombre de Reynolds, dans de larges limites. A puissance injectee par le mouvement de la plaque donnee, les echelles de dimension de la turbulence sont evidemment d'autant plus petites que le diametre des orifices de la plaque est reduit. En utilisant des liquides de diverses viscosites, on disposerait d'une variable de plus pour agir sur les parametres du mouvement obtenu. Un calcul concernant la diffusion de l'energie a permis de retrouver dans de bonnes conditions certains des resultats des mesures, et de deduire plusieurs parametres importants, a partir des resultats experimentaux. La mesure de la turbulence dans l'eau a ete effectuee a l'aide d'un film chaud. Pour remplacer la vitesse moyenne necessaire a la mesure, l'element sensible a ete place a l'extremite d'un bras tournant. L'etude a comporte deux etapes: 1) la premiere etape a consiste a mettre en evidence les causes des perturbations constatees et les methodes permettant de les eliminer. La plupart de ces perturbations sont dues aux corps dissous dans l'eau (gaz ou sels mineraux). L'utilisation de films isoles au quartz presente une amelioration considerable. Seule la methode a temperature constante peut etre utilisee, pour des raisons liees a la necessite d'avoir une surchauffe bien definie et une compensation d'inertie thermique de l'element sensible, si cette temperature variait. Le dispositif experimental presente beaucoup de facilites pour la mise au point de la methode du fil chaud dans les liquides; 2) la methode de mesure ayant ete mise au point sous l'aspect general, elle a ete appliquee a la determination des grandeurs caracteristiques de la turbulence obtenue: valeurs efficaces des fluctuations - correlations - micro-echelles - spectres. On a remarque notamment l'existence d'une zone de Kolmogoroff pour le spectre. On a deduit des mesures, par le calcul, la valeur de la constante de Kolmogoroff. Les resultats se situent a l'interieur des valeurs obtenues par d'autres experimentateurs, tout en permettant de les preciser. On a ensuite etudie certaines caracteristiques du mouvement des materiaux dans l'eau par photographie. La mesure des concentrations des billes en suspension a donne de tres bons resusltats. La precision de la mesure elle-meme n'est theoriquement pas limitee. Malheureusement, le procede n'est pas applicable aux particules tres petites.

Author: G. A. Ekama
Publisher: International Water Assn
ISBN: 9781900222037
Category : Science
Languages : en
Pages : 216

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Book Description
The secondary settling tank (SST) plays a major ro

Author: Canada. Department of Fisheries and Oceans
Publisher: Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir
ISBN:
Category : Science
Languages : fr
Pages : 376

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Book Description
Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.

Author: Hermann Schlichting (Deceased)
Publisher: Springer
ISBN: 366252919X
Category : Technology & Engineering
Languages : en
Pages : 814

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Book Description
This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.

Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438

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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.

Author: Hunter Rouse
Publisher:
ISBN:
Category : Hydraulics
Languages : en
Pages : 292

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Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790

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Book Description
This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.