# American Institute of Mathematical Sciences

October  2014, 34(10): 3985-4017. doi: 10.3934/dcds.2014.34.3985

## Analysis and optimal control of some solidification processes

 1 Departamento de Ciencias Básicas, Universidad del Bío-Bío, Campus Fernando May, Casilla 447, Chillán, Chile 2 Departamento de Ecuaciones Diferenciales y Análisis Numérico, Universidad de Sevilla, Aptdo. 1160, 41080 Sevilla, Spain

Received  October 2012 Revised  January 2013 Published  April 2014

In this paper we consider a mathematical model that describes the solidification of a binary alloy. We prove some existence and uniqueness results for a regularized problem, depending on a small parameter $\epsilon$. We also analyze the behavior of the regularized solutions as $\epsilon \to 0$. Then, we consider some associated optimal control problems. We prove existence and optimality results and we present and discuss some iterative methods.
Citation: Roberto C. Cabrales, Gema Camacho, Enrique Fernández-Cara. Analysis and optimal control of some solidification processes. Discrete & Continuous Dynamical Systems - A, 2014, 34 (10) : 3985-4017. doi: 10.3934/dcds.2014.34.3985
##### References:
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##### References:
 [1] R. A. Adams, Sobolev Spaces,, Pure and Applied Mathematics, (1975). Google Scholar [2] W. J. Boettinger, J. A. Warren, C. Beckermann and A. Karma, Phase-field simulation of solidification,, Annual Review of Materials Research, 32 (2002), 163. doi: 10.1007/BF02648953. Google Scholar [3] J. Ni and C. Beckermann, A volume-averaged two-phase model for solidication transportphenomena,, Metallurgical Transactions B, 22 (1991), 349. Google Scholar [4] W. D. Bennon and F. P. Incropera, A Continuum Model for Momentum, Heat and Species Transport in Binary Solid-Liquid Phase Change Systems: I. Model Formulation,, Int. J. Heat Mass Transfer, 30 (1987), 2161. doi: 10.1016/0017-9310(87)90094-9. Google Scholar [5] W. D. Bennon and F. P. Incropera, A Continuum Model for Momentum, Heat and Species Transport in Binary Solid Liquid Phase Change Systems: II. Application to Solidification in a Rectangular Cavity,, Int. J. Heat Mass Transfer, 30 (1987), 2171. doi: 10.1016/0017-9310(87)90095-0. Google Scholar [6] Ph. Blanc, L. Gasser and J. Rappaz, Existence for a stationary model of binary alloy solidification,, RAIRO Modél. Math. Anal. Numér., 29 (1995), 687. Google Scholar [7] J. L. Boldrini and G. Planas, A tridimensional phase-field model with convection for phase change of an alloy,, Discrete Contin. Dyn. Syst., 13 (2005), 429. doi: 10.3934/dcds.2005.13.429. Google Scholar [8] P. Constantin and C. Foias, Navier-Stokes Equations,, Chicago Lectures in Mathematics, (1988). Google Scholar [9] M. Durán, E. Ortega-Torres and J. Rappaz, Weak solution of a stationary convection-diffusion model describing binary alloy solidification processes,, Math. Comput. Modelling, 42 (2005), 1269. doi: 10.1016/j.mcm.2005.01.035. Google Scholar [10] M. Durán and E. Ortega-Torres, Existence of weak solutions for a non-homogeneous solidification model,, Electron. J. Differential Equations, 2006 (). Google Scholar [11] I. Ekeland and R. Temam, Convex analysis and Variational Problems,, Society for Industrial and Applied Mathematics, (1999). doi: 10.1137/1.9781611971088. Google Scholar [12] J.-L. Lions and J. He, Exact and Approximate Controllability for Distributed Parameter Systems: A Numerical Approach,, Encyclopedia of Mathematics and its Applications, (2008). doi: 10.1017/CBO9780511721595. Google Scholar [13] O. A. Ladyzenskaya, V. A. Solonnikov and N. N. Uraltzeva, Linear and Quasilinear Equations of Parabolic Type,, Translations of Mathematical Monographs, (1967). Google Scholar [14] G. Planas and J. L. Boldrini, A bidimensional phase-field model with convection for change phase of an alloy,, J. Math. Anal. Appl., 303 (2005), 669. doi: 10.1016/j.jmaa.2004.08.068. Google Scholar [15] J. C. Ramirez and C. Beckermann, Examination of binary alloy free dendritic growth theories with a phase-field model,, Acta Materialia, 53 (2005), 1721. doi: 10.1016/j.actamat.2004.12.021. Google Scholar [16] J.-C. Saut and B. Scheurer, Unique continuation for some evolution equations,, J. Differ. Equations, 66 (1987), 118. doi: 10.1016/0022-0396(87)90043-X. Google Scholar [17] J. Simon, Compact sets in the space $L^p(0,T;B)$,, Annali di Matematica Pura ed Applicata, 146 (1986), 64. doi: 10.1007/BF01762360. Google Scholar [18] J. Simon, A constructive proof of a theorem of G. de Rham,, C. R. Acad. Sci. Paris Sér. I Math., 316 (1993), 1167. Google Scholar [19] R. Temam, Navier Stokes Equations. Theory and Numerical Analysis,, Reprint of the 1984 edition, (1984). Google Scholar
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