Infiltration of water into a heterogeneous media (3D simulation)

Randomly generated permeability at saturation: low permeable (blue) regions are set to transparency, while yellow becomes opaque, hiding the high permeable (red) regions.

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Highly saturated regions are red, while low saturated ones (blue) are set to transparency.
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Volume rendering visualization by Catalin Dartu, Visualization and Numerical Geometry group at IWR. Details concerning the model, computation and analysis can be found in Preprint 98-43 (SFB 359), IWR, University of Heidelberg and RANA Preprint 16-01, Eindhoven University of Technology.