University of Twente Student Theses


The Perdigão field campaign : evaluation of the Cell Perturbation Method in atmospheric simulations

Veen, Leendert van (2018) The Perdigão field campaign : evaluation of the Cell Perturbation Method in atmospheric simulations.

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Abstract:State-of-the-art modeling methods are used to simulate the flow over highly complex terrain as documented during the 2017 Perdigão Field Campaign (Portugal). A one-way nesting technique in the Weather Research and Forecasting (WRF) model distinguishing four levels is used to capture the broad range of scales of motion. A new coupling strategy, the Cell Perturbation Method (CPM), is adopted and evaluated using the field data of the campaign. To what extent CPM is contributing to the numerical predictions is the main question addressed in this research. Different model configurations are compared and both qualitative and quantitative comparisons are evaluated to demonstrate the contributions of CPM to the overall results. The domain definition is found important and the robustness of CPM is shown by field comparisons. Wind direction comparisons with tower data of eight different towers show a better agreement for towers measuring the mean flow. Wind speed is under-predicted for all the towers and only the average magnitude of the prediction of turbulent kinetic energy (TKE) has a reasonable agreement with some of the tower data. Comparison with a simulations without CPM shows that the inclusion of CPM does not alter the simulated results significantly.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:31 mathematics, 38 earth sciences, 43 environmental science
Programme:Applied Mathematics MSc (60348)
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