The computational fluid dynamics code Fluidity, with anisotropic mesh adaptivity, is used as a multi-scale obstacle-accommodating meteorological model. A novel method for generating realistic inlet boundary conditions based on the view of turbulence as a superposition of synthetic eddies is adopted. It is able to reproduce prescribed first-order and second-order one-point statistics and turbulence length scales. The aim is to simulate an urban boundary layer. The model is validated against two standard benchmark tests: a plane channel flow numerical simulation and a flow past a cube physical simulation. The performed large-eddy simulations are in good agreement with both reference models giving confidence that the model can be used to successfully simulate urban atmospheric flows.
- adaptive mesh
- inlet boundary conditions
- large-eddy simulation
Pavlidis, D., Gorman, G. J., Gomes, J. L. M. A., Pain, C. C., & ApSimon, H. (2010). Synthetic-eddy method for urban atmospheric flow modelling. Boundary-Layer Meteorology, 136(2), 285-299. https://doi.org/10.1007/s10546-010-9508-x