Geodesic
Numerical simulation of natural convection in a freezing soil
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 161 (2019) no. 3, pp. 327-340 Cet article a éte moissonné depuis la source Math-Net.Ru

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A mathematical model and a numerical method for solving the natural convection and crystallization of pore moisture were considered. The mathematical model contains partial differential equations for temperature, velocity, and pressure. The fluid flow, under the assumption of low velocities, was described by the Stokes equations, where the phase transition of the liquid into ice was taken into account using the fictitious domain method by introducing an additional term responsible for the flow in frozen ground with a low permeability coefficient. The discontinuous finite element method on unstructured computational meshes was used for the numerical solution of the problem of modeling a multiphysical process in complex geometric domains. The fictitious domain method for the flow problem enables to carry out calculations on a fixed computational grid. The results of the numerical solution of the two-dimensional problem for three test geometric domains were presented.
Keywords: mathematical modeling, heat and mass transfer, flow and transport, fictitious domain method, finite element method.
Mots-clés : phase transition 
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     title = {Numerical simulation of natural convection in a freezing soil},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
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V. N. Alekseev; M. V. Vasilyeva; V. I. Vasilyev; N. I. Sidnyaev. Numerical simulation of natural convection in a freezing soil. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 161 (2019) no. 3, pp. 327-340. http://geodesic.mathdoc.fr/item/UZKU_2019_161_3_a0/

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