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Author: Jakob Mann
Publisher:
ISBN: 9788755026032
Category :
Languages : en
Pages : 75
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Book Description
Author: Jakob Mann
Publisher:
ISBN: 9788755026032
Category :
Languages : en
Pages : 75
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Book Description
Author: Paul Douglas Quay
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 388
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Book Description
Author: Rurik Benaly Halaby
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
Author: G.T. Csanady
Publisher: Springer Science & Business Media
ISBN: 9401025274
Category : Science
Languages : en
Pages : 261
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Book Description
The rather excessive public preoccupation of the immediate past with what has been labeled the 'environmental crisis' is now fortunately being replaced by a more sus tained and rational concern with pollution problems by public administrators, engineers, and scientists. It is to be expected that members of the engineering profes sion will in the future widely be called upon to design disposal systems for gaseous and liquid wastes which meet strict pollution control regulations and to advise on possible improvements to existing systems of this kind. The engineering decisions involved will have to be based on reasonably accurate quantitative predictions of the effects of pollutants introduced into the atmosphere, ocean, lakes and rivers. A key input for such calculations comes from the theory of turbulent diffusion, which enables the prediction of the concentrations in which pollutants may be found in the neighborhood of a release duct, such as a chimney or a sewage outfall. Indeed the role of diffusion theory in pollution prediction may be likened to the role of applied mechanics (,strength of materials') in the design of structures for adequate strength. At least a certain group of engineers will have to be proficient in applying this particular branch of science to practical problems. At present, training in the theory of turbulent diffusion is available only at the gra duate level and then only in a very few places.
Author: Soren Ott and Jacob Sparre Andersen Jakob Mann
Publisher:
ISBN:
Category :
Languages : de
Pages :
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Book Description
Author: Christina M. Vanderwel
Publisher:
ISBN:
Category : University of Ottawa theses
Languages : en
Pages :
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Book Description
The objective of this thesis research is to further the understanding of turbulent diffusion by experimentally studying the turbulent diffusion of a plume of dye released in uniformly sheared flow generated in a water tunnel. The flow studied was nearly homogeneous but strongly anisotropic and had a turbulent Reynolds number of 150. Maps of the turbulent velocity and dye concentration were measured simultaneously using stereoscopic particle image velocimetry and planar laser-induced fluorescence. A thorough analysis of the planar laser-induced fluorescence technique was performed; several previously unconsidered sources of error were identified and corrections were proposed. The measured evolutions of the mixed velocity-concentration statistics of the plume were compared with previous studies. The turbulent scalar flux vector was related to the mean concentration gradient through a first-order gradient transport model and, for the first time in an experimental flow, all components of the turbulent diffusivity tensor were measured directly. The turbulent diffusivity tensor was found to be highly anisotropic and its streamwise component appeared to be counter-gradient. The relative diffusion of the plume was also investigated and the evolution of the mean square particle separation was found to be consistent with Richardson-Obukhov scaling, with a value of Richardson's constant equal to 0.35. The fine structure of the concentration field and the mixed velocity-concentration statistics were also documented. Because of the high level of intermittency of the present plume, the scalar probability density function was strongly non-Gaussian and the conditional expectations of the velocity components and the scalar dissipation, conditioned upon the scalar value, were distinctly non-linear. Lastly, the role of coherent structures on scalar diffusion was investigated and a conditional eddy analysis demonstrated that hairpin vortices were associated closely with large scalar flux events.
Author: Thomas N. Keefer
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 162
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Book Description
Author: Cameron Tropea
Publisher: Springer Science & Business Media
ISBN: 3540251413
Category : Science
Languages : en
Pages : 1570
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Book Description
Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.
Author: Hadassah Kaplan
Publisher: Springer Science & Business Media
ISBN: 9401127492
Category : Science
Languages : en
Pages : 444
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Book Description
The 35th OHOLO Conference, which provided the basis for the present book covered a broad range of topics. Basic studies and newly developed methods in modeling atmospheric flows are discussed, besides analyses of concentration fluctuations in different atmospheric conditions, and techniques of data acquisition. The book gives an excellent state-of-the-art impression of the situation in turbulent diffusion and transport.
Author: H. J. V. Tyrrell
Publisher: Butterworth-Heinemann
ISBN: 1483100898
Category : Science
Languages : en
Pages : 465
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Book Description
Diffusion in Liquids: A Theoretical and Experimental Study aims to discuss the principles, applications, and advances in the field of diffusion, thermal diffusion, and thermal conduction in liquid systems. The book covers topics such as the principles of non-equilibrium thermodynamics; diffusion in binary and multicompetent systems; and experimental methods of studying diffusion processes in liquids. Also covered in the book are topics such as the theoretical interpretations of diffusion coefficients; hydrodynamic and kinetic theories; and diffusion in electrolyte systems. The text is recommended for physicists who would like to know more about the concepts and updates in the field of diffusion.
