in this present study, volume of fluid method in openfoam open source cfd package will be extended to consider phase change phenomena with modified model due to condensation and boiling processes. this model is suitable for the case in which both unsaturated phase and saturated phase are present and for beginning boiling and condensation process needn't initial interface. both phases (liqu...

This study examines the a brane Fuel Cell (PEMFC) b an approximatedmulti-co balance. Accuracy is assess and the correctedAMCmo does not permit the direct and to implications that C and mixture diffusion coe the maximum error betwe appropriate for PEMFC ap

Fuel flexibility is a significant advantage of solid oxide fuel cells (SOFCs) and can be attributed to their high operating temperature. Here we consider a direct internal reforming solid oxide fuel cell setup in which a separate fuel reformer is not required. We construct a multidimensional, detailed model of a planar solid oxide fuel cell, where mass transport in the fuel channel is modeled u...

Recent advances and findings reported in the literature show that lattice Boltzmann method can be a viable rather efficient alternative to classical numerical methods modeling multi-species flows. Based on kinetic theory of multicomponent gases, multi-fluid approaches are derived. Each species evolves according specific properties, proper coupling must introduced for diffusivity. In recent year...

We have used the Maxwell–Stefan diffusion theory to model mass transfer between tertiary-injected gas and residual oil blocked by water, in order predict time required for rupture of water barrier due swelling. also designed conducted a set visualization micromodel experiments on various pure multicomponent oil–gas systems measure tertiary injection processes. The experimental results show that...

In this study, a steady-state model is developed by combining mechanical, Navier–Stokes, Maxwell–Stefan, and Butler–Volmer equations. This then used to investigate the influences of diffusion layer thickness deformation under specific assembly force on porosity distribution as an indicator fuel cell performance. The HT-PEM (high temperature proton exchange membrane) built using COMSOL Multiphys...

The paper considers a simple model of radially symmetric cell which undergoes growth due to a continuous supply of nutrient, and disintegration as a result from the various tasks the cell performs. The boundary of the cell is a \free boundary", unknown in advance, which evolves by responding to both the growth and disintegration processes. If the nutrient concentration (at in nity) exceeds a ce...