Newly developed software THMC 2D (HGC 4.1 ~ HGC 4.4) and THMC 3D (HGC 5.1 ~HGC 5.4) have been published by Center for Advanced Model Research Development and Application (CAMRDA). The THMC software can simulate variably saturated flow (H – Hydrology), thermal transport (T), reactive chemical transport (C), and geo-Mechanics (M) in two dimensions (2D) and three dimensions (3D), respectively. They can be employed to model individual, partially coupled, or fully coupled THMC processes. Early versions of these computational models were developed by Prof. Gour-Tsyh (George) Yeh, who found CAMRDA (Center of Advanced Models for Research Development and Applications) at NCU. Previously, Prof. Yeh was a Senior Research Staff at Oak Ridge National Laboratory, a Professor at Penn State University, and a Provost Professor at University of Central Florida. The coupling of THMC modules has been accomplished based on theories of physics, mechanics chemistry, and biology. The biogeochemical processes cover many types of biogeochemical reactions: aqueous complexations, adsorption-desorption, precipitation-dissolution, ion-exchange, and more than 30 types of microbe-mediated reactions. Every type of geochemical reactions can be treated as at equilibrium or kinetic reactions. THMC 2D/3D provides flexible modeling scenarios to deal with complex subsurface contaminated problems and include many numerical discretization to make the model robust in convergence problems. THMC 2D/3D can be applied to many realistic real-world problems, such as CO2 geological sequestrations, enhanced geothermal energy extractions, deep geological deposition of nuclear wastes, investigations of groundwater pollutions, water resources managements, etc.

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