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Titre :
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An asymmetric residence-time distribution model flow systems
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Auteurs :
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R. Hovorka
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Type de document :
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thèse/mémoire
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Editeur :
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Ann Arbor, Michigan, USA : University microfilms international, 1961
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Format :
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261 p.
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Langues:
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= Anglais
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Catégories :
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POLLUTION ET TRAITEMENT DES EAUX
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Mots-clés:
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MODELE MATHEMATIQUE
;
ECOULEMENT
;
CALCUL
;
TRACEUR
;
TEMPS DE SEJOUR
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Résumé :
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A mathematical model, which approximately represents internal mixing due to turbulence, non-uniform velocity profiles, etc. in flow systems is developped. this model is based on a suitable combination of perfectly mixed and plug flow vessels arranged to account for both live and dead-flow volume. the model is defined by four parameters, the values of which completely define the mixing within the model. such a model is useful in the study of the steady-state and dynamic behavior of flow systems. the model is confirmed in two ways, by : 1) the representation of the unsteady-state linear residence-time distribution of flow systems and 2) the determination of the steady-state non linear chemical conversion for a second order kinetic system. from a mathematical treatment of the model, a general solution for the residence-time distribution of the model as a function of the four parameters is derived ; this solution consists of only exponentials and powers of the independent variable. techniques are presented for the determination of the model and four confirmation examples are described. using the model determined from an experimental residence-time distribution, the upper and lower limits on conversion for a second order reaction are estimated. these results agree closely with the actual experimental conversion.
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Diplôme :
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Degree of Doctor of Philosophy
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