Adjoint-consistent formulations of slip models for coupled electroosmotic flow systems

Vikram V Garg, Serge Prudhomme, Kris G van der Zee, Graham F Carey

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Background Models based on the Helmholtz `slip' approximation are often used for the simulation of electroosmotic flows. The objectives of this paper are to construct adjoint-consistent formulations of such models, and to develop adjoint-based numerical tools for adaptive mesh refinement and parameter sensitivity analysis. Methods We show that the direct formulation of the `slip' model is adjoint inconsistent, and leads to an ill-posed adjoint problem. We propose a modified formulation of the coupled `slip' model, which is shown to be well-posed, and therefore automatically adjoint-consistent. Results Numerical examples are presented to illustrate the computation and use of the adjoint solution in two-dimensional microfluidics problems. Conclusions An adjoint-consistent formulation for Helmholtz `slip' models of electroosmotic flows has been proposed. This formulation provides adjoint solutions that can be reliably used for mesh refinement and sensitivity analysis.
Original languageEnglish (US)
JournalAdvanced Modeling and Simulation in Engineering Sciences
Volume1
Issue number1
DOIs
StatePublished - Sep 27 2014
Externally publishedYes

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