A worksheet-based tool to implement reactive transport models in COMSOL Multiphysics

The increasing needs for modelling of reactive transport phenomena in different areas environmental have led to the development many numerical codes. However, them suffer from a lack flexibility, which hinders adaptation codes new problems. Moreover, cases, changes can be done by very reduced group people, and often single person, main developer. Implementation platforms based on multiphysics removes these barriers, although until now within that programming environments has been only possible coupling geochemical equations using operator splitting techniques. This paper presents EE4MGM tool, MS Excel worksheet, provided supplementary material, edition complete implementation models COMSOL. tool automatically generates code needed solve desired problem selecting species make up system. way, model will completely adapted idealisation applied, being able choose easily effortlessly wide range levels conceptual complexity. organization data input equation libraries obtained COMSOL environment are first described. Afterwards, two examples, one two-dimensional domains, check utility presented.