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The Devil's in the Details

Advanced design to represent cloud turbulence improves simulations in a multi-scale model

April 2015
Low and wispy clouds have escaped climate model detection until now. A new modeling system captures their most difficult-to-picture side: turbulence. Researchers from Pacific Northwest National Laboratory led implementation of a new system to represent turbulence in a multi-scale atmosphere model that improves the simulated distribution of low clouds.

Simulating Subsurface Flow and Transport at Multiple Scales

New method shows events occurring in a large sample at the resolution of soil grains

April 2015

Scientists at PNNL introduced a method that overcomes the computational challenge of simulating subsurface phenomena that occur at both the scale of tens to hundreds of microns-the size of solid soil grains and pore spaces-and at much larger scales. The researchers presented the first simulations of pore-scale flow and transport over a large, decimeter-scale volume.

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