This report documents the fundamental details of the academic/research simulatorsused within work package 2 of the HEATSTORE project. The primary focus of this report is to complement deliverable 2.1 with the more technical aspects of the academic/research simulators used. An updated version of this report is due in Month 35. The simulators are used to model prospective operationsatvarious sites including the High Temperature -Aquifer Thermal Energy Storage(HT-ATES)sites at Geneva and Bern-Forsthaus in Switzerland as well asKoppert-Cress in the Netherlands.They arealso able tomodel different geothermal conditions, particularly through themodeling of a high enthalpy reservoir in the Azores and scenario modeling for superhigh-temperature resource development in the Hengill area in Iceland. The academic/research codes discussedin separate chapterswithin this report are CSMP++/Nexus, MOOSE, Code_Bright, Retraso and SEAWAT. For each simulator the following characteristics are discussed:assumptions and governing equations, numerical discretization method, basic solution algorithmand logic, pre-and post-processing, the sites the code is used for and IP and code availability. An appendix with summarized information on input files for the simulators is provided at the end.