Zooming Technique for Wind Transport of Air Pollution. Modelling, Analysis and211 Simulation. Modelling, Analysis and Simulation

摘要

In air pollution dispersion models, typically systems of millions of equations211u001ethat describe wind transport, chemistry, and vertical mixing have to be 211u001eintegrated in time. To have more accurate results over specific fixed areas of 211u001einterest-usually highly polluted areas with intensive emissions-a local grid 211u001ereinforcement or zoom is often required. For the wind transport part of the 211u001emodels, i.e. for finite volume discretizations of the transport equation, we 211u001epropose a zoom technique that is positive, mass-constructive and allows to use 211u001esmaller time steps as enforced by the CFL restriction in the zoom regions only.