GETFLOWS can simulate the advective heat transport in the fluid phase with the heat exchange between solid and liquid phase simultaneously. This fluid-flow and heat transport coupled simulation can be used, for example, when we identify the subsurface hydrogeological structures by using computed temperature variations as the tracer. The heat exchange between fluid phase and solid phase can be treated as unsteady process appropriately considering the contact area and contact time of the different phases. GETFLOWS can also deal with instantaneous equilibrium conditions under the hypothesis that thermal difference does not occur between fluid phase and solid phase. Heat transport on the surface which is influenced by the river flow, spring formation or air temperature fluctuations can be computed with the other land surface processes such as solar radiation, latent/sensible heat movement, and heat conduction into the underground.
Non-isothermal flow can be considered in the coupled analysis of fluid flow and heat transport. The mass transfer between phases such as water vaporization, gas dissolution into water phase and temperature dependency of fluid properties can be considered. It is possible to simulate the pore water or water vapor movement around the heat-generated materials under the detailed construction operations.
Output results which can be obtained from the simulation are temperature of water/air mixed fluid phase, temperature of solid material, atmospheric temperature, saturation of water and gas phases, fluids pressure, hydraulic potential, water depth/level, flow velocity of each fluid phase, etc.
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