• Media type: Text; Report; E-Book
  • Title: Hybrid finite-volume/finite-element schemes for p(x)-Laplace thermistor models
  • Contributor: Fuhrmann, Jürgen [Author]; Glitzky, Annegret [Author]; Liero, Matthias [Author]
  • Published: Weierstrass Institute for Applied Analysis and Stochastics publication server, 2017
  • Language: English
  • DOI: https://doi.org/10.20347/WIAS.PREPRINT.2378
  • Keywords: 80M12 ; 35G60 ; 80A20 ; article ; 35Q79 ; 35J92 ; Finite volume scheme -- p(x)-Laplace thermistor model -- path following ; 65M08
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  • Description: We introduce an empirical PDE model for the electrothermal description of organic semiconductor devices by means of current and heat flow. The current flow equation is of p(x)-Laplace type, where the piecewise constant exponent p(x) takes the non-Ohmic behavior of the organic layers into account. Moreover, the electrical conductivity contains an Arrhenius-type temperature law. We present a hybrid finite-volume/finite-element discretization scheme for the coupled system, discuss a favorite discretization of the p(x)-Laplacian at hetero interfaces, and explain how path following methods are applied to simulate S-shaped current-voltage relations resulting from the interplay of self-heating and heat flow.