Abstract
Most non-trivial existence and convergence results for systems of partial differential equations of evolution exclude or avoid the case of a non-symmetrical parabolic part. Therefore such systems, generated by the physical analysis of the processes of transfer of heat and moisture in porous media, cannot be analyzed easily using the standard results on the convergence of Rothe sequences (e.g. those of W. Jager and J. Kacur). In this paper the general variational formulation of the corresponding system is presented and its existence and convergence properties are verified; its application to one model problem (preserving the symmetry in the elliptic, but not in the parabolic part) is demonstrated.
Similar content being viewed by others
References
J. Appell, P. P. Zabrejko: Nonlinear Superposition Operators. Cambridge University Press, 1980.
J. Dalík, J. Danůůek and S. Šůtastník: The Kiessl model, existence of classical solution. In: Proceedings of the conference “Matematická štatistika, numerická matematika a ich aplikácie”, Koůovce (Slovak Republic). 1999, pp. 62–75. (In Slovak.)
J. Dalík, J. Danůůek and J. Vala: Numerical solution of the Kiessl model. Appl. Math. 45 (2000), 3–17.
J. Dalík, J. Svoboda and S. Šůtastník: A model of moisture and temperature propagation. Preprint. Technical University (Faculty of Civil Engineering) in Brno, 2000.
J. Franců: Monotone operators—a survey directed to differential equations. Appl. Math. 35 (1991), 257–300.
J. Franců: Weakly continuous operators—applications to differential equations. Appl. Math. 39 (1994), 45–56.
S. Fuůík, A. Kufner: Nonlinear Differential Equations. Elsevier, Amsterdam, 1980.
H. Gajewski, K. Gröger and K. Zacharias: Nichtlineare Operatorgleichungen und Operatordifferentialgleichungen. Akademie Verlag, Berlin, 1974.
H. Glaser: Wärmeleitung und Feuchtigkeitdurchgang durch Kühlraumisolierungen. Kältetechnik H.3 (1958), 86–91.
W. Jäger, J. Kaůur: Solution of porous medium type systems by linear approximation schemes. Numer. Math. 60 (1991), 407–427.
W. Jäger, J. Kaůur: Approximation of porous medium type systems by nondegenerate elliptic systems. Stochastische mathematische Modelle, Preprint 123. University of Heidelberg, 1990.
J. Kaůur: Method of Rothe in Evolution Equations. Teubner-Verlag, Leipzig, 1985.
J. Kaůur: Solution of some free boundary problems by relaxation schemes. Preprint M3-94. Comenius University (Faculty of Mathematics and Physics) in Bratislava, 1994.
J. Kaůur: Solution to strongly nonlinear parabolic problem by a linear approximation scheme. Preprint M2-96. Comenius University (Faculty of Mathematics and Physics) in Bratislava, 1996.
J. Kaůur, A. Handloviůová and M. Kaůurová: Solution of nonlinear diffusion problems by linear approximation schemes. SIAM J. Numer. Anal. 30 (1993), 1703–1722.
K. Kiessl: Kapillarer und dampfförmiger Feuchtetransport in mehrschichtlichen Bauteilen. Dissertation. University of Essen, 1983.
O. Kritscher: Die wissenschaftlichen Grundlagen der Trockungstechnik. Springer-Verlag, Berlin, 1978.
M. Krus: Feuchtetransport-und Speicherkoeffizienten poröser mineralischer Baustoffen: theoretische Grundlagen und neue Messtechniken. Dissertation. University of Stuttgart, 1995.
A. Kufner, O. John and S. Fuůík: Function Spaces. Academia, Prague, 1977.
H. M. Künzel: Rechnerische Untersuchungen des Langzeit-Feuchteverhaltens von Wärmedämmschichten in Umkehrdächern mit Begründung. Research report IBP FtB-23, 1993.
Math Works MATLAB —The Language of Technical Computing, Application Program Interface Guide, Version 5. The MathWorks, Inc., 1998.
V.G. Maz'ya: Spaces of S. L. Sobolev. Leningrad (St. Petersburg) University Press, 1985. (In Russian.)
J. Neůas: Introduction to the Theory of Nonlinear Elliptic Equations. Teubner-Verlag, Leipzig, 1983.
M. Pavluš, E. Pavlušová: On the mathematical modelling of the process of the heat and moisture transfer in the porous materials. Research report E11-99-8. Institute of Nuclear Research Dubna (Russia), 1999.
T. Roubíůek: Relaxation in Optimization Theory and Variational Calculus. Walter de Gruyter, Berlin, 1997.
J. Vala: A comment to the Jäger-Kaůur linearization scheme for strongly nonlinear parabolic equations. Appl. Math. 44 (1999), 481–496.
J. Vala: On one mathematical model of creep in superalloys. Appl. Math. 43 (1998), 351–380.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Vala, J. On a System of Equations of Evolution with a Non-Symmetrical Parabolic Part Occuring in the Analysis of Moisture and Heat Transfer in Porous Media. Applications of Mathematics 47, 187–214 (2002). https://doi.org/10.1023/A:1021741320045
Issue Date:
DOI: https://doi.org/10.1023/A:1021741320045