PIMS/AMI Seminar: Pengtao Sun (University of Nevada)

Abstract:

In this talk, a three-dimensional, non-isothermal, multiphase, two phase steady state transport model and its efficient numerical methods are systematically studied for a full proton exchange and accuracy. The conservation equations of mass, momentum, species, charge and energy are fully addressed in view of the non-isothermality and multiphase feature in PEMFC model. In addition, we present some new formulations for species equations in the interests of interactions among the speciesfrom an accurate numerical discretionization's point of view. In a framework of the combined finite element-upwind finite volume method, some efficient numerical methods are developed in terms of Kirchhoff transformation in order to achieve fast and convergent numerical simulation for the studied PEMFC model. Three-dimensional numerical simulations demonstrate that the convergent physical solutions can be attained within 80 steps, in contrast to the oscillating and non-convergent nonlinear iterations conducted by commercial flow solvers or in-house code with standard finite element/volume methods. The results of numerical convergence tests verify the efficiency and accuracy of our numerical algorithms and techniques.