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  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 5 (1973), S. 79-100 
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 12 (1980), S. 77-102 
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 6 (1970), S. 311-313 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 1002-1003 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. COMPARISON OF EXPERIMENTAL AND THEORETICAL VALUES OF THE CRITICAL VOLUMES FOR A FEW REPRESENTATIVE SUBSTANCES Vc Vc PC Tc exp. formula 12-77 33 65-5 65-3 45-8 191-1 99 98 46-3 506-9 228 229 218-3 647-4 56 55 Substance a P Equilibrium hydrogen 0-310 35-2 Methane 0-290 73-2 Methyl ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 31 (1980), S. 653-656 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Résumé Une intégrale première de l'équation de diffusion existe pour les solutions similaires quand le coefficient de diffusion obéit une loi de puissance arbitraire ou une loi exponentielle. La structure des solutions est discutée dans les deux cas ainsi que leur relation avec les résultats d'optimisation pour une diffusion arbitraire.
    Notes: Summary A first integral of the diffusion equation exists for similarity solutions when the diffusivity obeys a power or exponential law. Structure of the solutions in both cases and connection to an optimization result are discussed for an arbitrary diffusivity.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 44 (1993), S. 85-102 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Résumé Les simplifications analytiques connues de la solution similaire de Boltzmann sont unifiées et généralisées par l'étude des propriétés de symétrie et des transformations de l'équation de diffusion. On montre comment, pour certaines diffusivités, un problème de conditions aux limites se réduit à un problème de valeurs initiales. Une solution en séries obtenue pour ce cas est très précise pour un domaine étendu des paramètres.
    Notes: Abstract Previous analytical simplifications of Boltzmann's similarity solution are unified and generalized by examining symmetry and transformation properties of the equation. It is shown how to reduce boundary value problems to initial value problems for certain diffusivities. A series solution is derived for this case, and shown to be accurate for a broad range of parameter values.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Irrigation science 4 (1983), S. 277-287 
    ISSN: 1432-1319
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A general theory of vertical solute movement in a soil is presented, which takes into account uptake of water and solute by roots, irrigation or rainfall, and solute application and adsorption by the soil. Irrigation, rainfall, and the surface application of fertilizers are arbitrary functions of time. The main limitation of the theory is the neglect of the variability of soil-water conductivity with position. The theory is illustrated by comparing predictions and experimental observations of solute leaching losses measured in a lysimeter.
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  • 8
    ISSN: 1432-1319
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An investigation of the downward transport of a solute following a series of alternating irrigation/rainfall and evapotranspiration events is carried out. The principle of conservation of mass, and the concepts of partition chromatography are used in constructing a simple model which enables the peak solute concentration depth to be calculated at any particular time given the rainfall and evapotranspiration history. Prediction of the theory is compared with published data on solute transport.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Transport in porous media 18 (1995), S. 95-105 
    ISSN: 1573-1634
    Keywords: Horizontal infiltration ; nonlinear diffusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract New formulae giving the position of the wetting front and the surface water content during horizontal infiltration when the surface flux is specified are presented. The flux can be any smoothly-varying function of time, though only nonhysteretic flow is modeled. The approximation is in excellent agreement with an exact analytical solution existing for constant boundary flux and a nonlinear Fujita diffusivity. It is also successfully compared with a further exact solution existing for a particular time-varying flux.
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  • 10
    ISSN: 1573-1634
    Keywords: Water-retention curve ; capillary-rise fitting parameters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract The constraints on the different fitting parameters used in the water-retention equations of Brooks and Corey, Brutsaert, and Van Genuchten are analyzed. It is shown that in the dry part of the h(θ) curve all three equations might break down for clay soils when the fitting parameters are calculated by a best fit over observed field data. In that case, application of the h(θ) equations for water transfer dealing with the very dry parts of the water retention curve can lead to erroneous results and must be limited to the range of water contents of the original data set.
    Type of Medium: Electronic Resource
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