Application of Nek5000 to dispersion simulations

Abstract

Simulations of turbulent flow and gas dispersion are performed using Nek5000, with and without a subgrid-scale model. The results are compared with data from wind- tunnel experiments and previously performed simulations in CDP. These comparisons show good agreement between the reference data and the results obtained in this thesis, and the simulation time is reported to be approximately five times faster for Nek5000. Two routines have been implemented to improve the work with complex geometries, and a laminar test case is used to confirm the importance of this work and the spectral accuracy of the solver.