In proton exchange membrane fuel cells (PEMFCs) and solid oxide fuel cells (SOFCs) there are various transport processes strongly affected by catalytic chemical/electrochemical reactions in nano- or/and micro-structured and multi-functional porous electrodes. Due to the complexity of fuel cells, fundamental understanding of physical phenomena continues to be required for the coupled chemical and transport processes with two-phase flow/water management in PEMFCs, and internal reforming reactions/thermal management in SOFCs. The project deals with the coupling of micro scale reactions (such as the electrochemical reactions and catalytic reactions) with various transport phenomena to provide a comprehensive understanding of fuel cell dynamics. The methodology for the project is a combination of model development and integration, simulation/analysis and validation. For microscopically complex porous layers and active sites, submodels will be developed by considering the detailed elementary kinetic rates based on the intermediate chemical species and their reactions occurring on the surface of the involved materials. As the inputs, the obtained data from the microscopic submodels will be implemented by the macroscopic CFD codes, previously developed for various applications, to examine local parameters in the porous electrodes and components. Both macro- and microscopic models will be validated by the experimental and/or literature data during the course of the project. The project will make progress beyond the state-of-the-art in modelling and analysis of advanced fuel cells, such as ultra low Pt loading (<0.1mgPt/cm2) and high temperature (120-200oC) PEMFCs, and intermediate temperature (600-800oC) planar SOFCs.