1. The electrochemical half-cell operates at steady-state and isothermal conditions. 2. The mass transfer equation is ignored for simplifying the coupled model, so the model contains only charge and momentum transfer. This can be seen as ignoring the gradient of the concentration of mass and assuming that it remains constant. 3. The electrolyte is modeled as an incompressible, Newtonian fluid under laminar flow conditions. 4. The redox half-reactions comprise a single-step reaction in the liquid phase, and the formation of intermediates or side-products is ignored.