leveque's swirling flow on unstructured triangular mesh

 
flow field (left) and tracer evolution with time (right)

doswell's cyclogenesis on unstructured triangular mesh

details

Ahmad, N., Z. Boybeyi, R. Lohner and A. Sarma, 2006: A Godunov-Type Scheme for Atmospheric Flows on Unstructured Grids: Scalar Transport. Pure and Applied Geophysics, 163:8, 1699-1735.

Ahmad, N., D. Bacon, M. Hall and A. Sarma, 2006: Application of the Multi-Dimensional Positive Definite Advection Transport Algorithm (MPDATA) to Environmental Modeling on Adaptive Unstructured Grids. International Journal for Numerical Methods in Fluids, 50:10, 1247-1268.