3/13/2024 0 Comments Terrain values in mx sim![]() For comparison, results from the same simulation are presented using the IBM. Results are presented for different orders of advection schemes, grid resolutions and aspect ratios, as well as various degrees of terrain slope. This is accomplished using a scalar advection test case, and comparing the numerical solution to the analytical solution. ![]() First, the errors that arise in the WRF model when complex terrain is present are presented. Use of the method facilitates explicit resolution of complex terrain, even urban terrain, in the WRF mesoscale model. In this dissertation, an immersed boundary method is developed for use in numerical weather prediction. Use of an alternative Cartesian gridding technique, known as an immersed boundary method (IBM), alleviates coordinate transformation errors and eliminates restrictions on terrain slope which currently limit mesoscale models to slowly varying terrain. Mesoscale models, such as the Weather Research and Forecasting (WRF) model, are increasingly used for high resolution simulations, particularly in complex terrain, but errors associated with terrain-following coordinates degrade the accuracy of the solution.
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