textline: OpenGeoSys (OGS) is a scientific [open source project](https://github.com/ufz/ogs) for the development of numerical methods for the simulation of thermo-hydro-mechanical-chemical (THMC) processes in porous and fractured media. It has been successfully applied in the fields of contaminant hydrology, water resources and waste management, geotechnical applications, geothermal energy systems and energy storage.
textline: OpenGeoSys (OGS) is a scientific [open source project](https://github.com/ufz/ogs) for the development of numerical methods for the simulation of thermo-hydro-mechanical-chemical (THMC) processes in porous and fractured media. Current version is OpenGeoSys-6 which is documented on this page. For information about the discontinued OpenGeoSys-5, see [its dedicated section](/ogs-5). OGS been successfully applied in the fields of contaminant hydrology, water resources and waste management, geotechnical applications, geothermal energy systems and energy storage.
