Images

XFEM - an illustration of a XFEM enrichment in 2d

2 aquifer system communicating through 5 wells
2d singular enrichment of pressure
the underlying coarse mesh is at the bottom

XFEM - an illustration of a XFEM enrichment in 3d

3d bulk rock is cut by 10 wells
1d-3d singular enrichment of velocity

DGR_1 - Deep geological repository model

model of DGR for future spent nuclear fuel
fractured granit massive of approximately 500m scale
piezometric head is displayed, including the subsurface view

DGR_2 - Deep geological repository 3d model

model of DGR for future spent nuclear fuel
fractured granit massive of approximately 200 km2
left - computational mesh, including main faults
right - piezometric head is displayed at the level of DGR (-500m)

Bedřichov - model of granit massive in the Jizera mountains

transport of natural tracers is modeled and compared extensive data collection measured on site
extensive measurements are collected online in the underground tunnel
piezometric head and velocity are displayed
detail of the tunnel cut by fractures is presented at the bottom

DFN - Discrete fracture network 2d demonstration

comparison of rock properties with different fracture network around tunnel excavation
left - homogenous rock
middle - stochastic DFN generated
right - stochastic DFN and some major deterministic faults
pressure is displayed, zero Dirichlet BC considered for simplification

Videos

Transport - an illustration of concentration propagation through fractured rock

2d model of fractured porous media
advection-diffusion equation solved on 1d-2d compatible mesh
concentration propagates through the fractures faster than through the bulk rock

Transport solver - comparison of different methods

1d problem with moving concentration peak
Finite volumes - piecewise constant solution, large numerical diffusion can be observed
Finite elements - piecewise linear solution, some oscillations are present
Discontinuous Galerkin - piecewise linear solution, no oscillations and minimal diffusion