01394nam a2200145 a 450000500170000000800400001710000250005724501040008226400160018633600090020233800200021152009050023150600460113685600660118220260901030412.0250101s2019    xx     o     000 0 eng d1 aAlexander Litvinenko10aSolution of the 3D density-driven groundwater flow problem with uncertain porosity and permeability 1barXivc2019  atext  aonline resource  aAs groundwater is an essential nutrition and irrigation resource, its pollution may lead to catastrophic consequences. Therefore, accurate modeling of the pollution of the soil and groundwater aquifer is highly important. As a model, we consider a density-driven groundwater flow problem with uncertain porosity and permeability. This problem may arise in geothermal reservoir simulation, natural saline-disposal basins, modeling of contaminant plumes, and subsurface flow. This strongly nonlinear time-dependent problem describes the convection of the two-phase flow. This liquid streams under the gravity force, building so-called "fingers". The accurate numerical solution requires fine spatial resolution with an unstructured mesh and, therefore, high computational resources. Consequently, we run the parallelized simulation toolbox \myug with the geometric multigrid solver on Shaheen II superc0 aOpen access — freely available to read.40uhttps://arxiv.org/pdf/1906.01632v2yRead the full paper (PDF)