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Titre :
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Mathematical modeling of solute segregation and redistribution during freezing in peat and overlying water
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Auteurs :
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X. Li
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Type de document :
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thèse/mémoire
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Editeur :
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Ann Arbor, USA : UMI, 1985
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Format :
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107p.
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Langues:
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= Anglais
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Catégories :
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THERMIQUE THERMODYNAMIQUE
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Mots-clés:
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MODELE MATHEMATIQUE
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TRANSFERT DE MASSE
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TRANSFERT DE CHALEUR
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CONGELATION
;
SEL
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ALGORITHME
;
MILIEU POREUX
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Résumé :
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Freezing of the water in a peatland causes the redistribution of existing solutes in both the shallow water and the peat zone. Such solute redistribution phenomena are of interest for establishing the geochronology of deposits and determining the nature of polluant burial. Understanding these phenomena is important for the consideration of peatlands as multi-use resources. This work presents the theoretical analyses and mathematical models to describe the solute redistribution processes during freezing in overlying water and interstitial water in the porous peat.The analyses include the segregation of the solute at the ice-water interface in both the ovelying water and the peat zone, solute transport in overlying water, as well as adsorbable solute transport in the interstitial water of the peat zone. An algorithm has been developed to solve these nonlinear moving interface problems. The basic theoretical analysis and the mathematical model have been utilized to describe the salt ice formation process and macrosegregation during freezing of binary alloys.
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Diplôme :
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Ph D Thesis in Chemical engineering, University of Michigan
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