The Fuel Cell & Electrolyzer Module User’s Guide gets you started with modeling using COMSOL Multiphysics. The information in this guide is specific to this module. Instructions how to use COMSOL in general are included with the COMSOL Multiphysics Reference Manual.

The Modeling with Electrochemistry chapter discusses a variety of topics, including Fundamentals of Electrochemistry Modeling, Modeling Electrochemical Reactions, Modeling Cyclic Voltammetry, and Postprocessing Your Solution.

The Fuel Cell and Electrolyzer Interfaces chapter describes the Hydrogen Fuel Cell and the Water Electrolyzer interfaces.

The Electrochemistry Interfaces chapter describes the Primary Current Distribution; Secondary Current Distribution; Tertiary Current Distribution, Nernst–Planck; Electrode, Shell; and Electroanalysis interfaces.

The Chemical Species Transport Interfaces chapter describes the Transport of Diluted Species, Transport of Concentrated Species, the Transport of Diluted Species in Porous Media, the Surface Reaction and the Reacting Flow interfaces.

The Fluid Flow Interfaces chapter describes, among others, the Darcy’s Law and Free and Porous Media Flow interfaces, included under the Porous Media and Subsurface Flow branch, as well as the Bubbly Flow, Mixture Model, and Euler–Euler Model interfaces, included under the Multiphase Flow branch.

The Laminar Flow interface is also available and is described in the COMSOL Multiphysics Reference Manual.

The Heat Transfer Interfaces chapter describes how electrochemical heat sources can be coupled to heat transfer, and the theory for how these are calculated.

This chapter describes the functionality of the Thermodynamics node to define thermo-physical and transport properties.

The Multiphysics Coupling Nodes chapter describes the coupling nodes available under the Multiphysics node for coupling various electrochemical interfaces using flow, potential, and temperature couplings, for example.