Numerical analysis of an adsorption dynamic model at the air–water interface

• M.I.M. Copetti ^[1] ; J.R. Fernández ^[2] ; M.C. Muñiz ^[3] ; C. Núñez ^[3]
  1. [1] Universidade Federal de Santa Maria

     Universidade Federal de Santa Maria

     Brasil

     
  2. [2] Universidade de Vigo

     Universidade de Vigo

     Vigo, España

     
  3. [3] Universidade de Santiago de Compostela

     Universidade de Santiago de Compostela

     Santiago de Compostela, España

     

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• Localización: Journal of computational and applied mathematics, ISSN 0377-0427, Vol. 281, Nº 1 (June 2015), 2015, págs. 82-93
• Idioma: inglés
• DOI: 10.1016/j.cam.2014.11.063
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• Resumen

  • In this paper we deal with the numerical analysis of an adsorption dynamic model arising in a surfactant solution at the air–water interface; the diffusion model is considered together with the so-called Langmuir isotherm. An existence and uniqueness result is stated. Then, fully discrete approximations are introduced by using a finite element method and a hybrid combination of backward and forward Euler schemes. Error estimates are proved from which, under adequate additional regularity conditions, the linear convergence of the algorithm is derived assuming a dependence between both spatial and time discretization parameters. Finally, some numerical simulations are presented in order to demonstrate the accuracy of the algorithm and the behaviour of the solution for two commercially available surfactants.