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ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
High-resolution WRF-LES simulations of a diurnal cycle with a nocturnal jet from a gravity current over complex terrain
Submission Author:
William C. Radünz , SP , Brazil
Co-Authors:
William C. Radünz, Pedro Peixoto, Bruno Carmo, Otávio Acevedo, Alejandro Gutiérrez, Adriane Prisco Petry, yoshiaki sakagami, Júlio Passos
Presenter: William C. Radünz
doi://10.26678/ABCM.ENCIT2022.CIT22-0551
Abstract
We perform multiscale simulations of a full diurnal cycle with the passage of a cold and stably-stratified gravity current close to midnight at the Morrinhos wind farm, in Northeast Brazil, a location with complex topography, using the Advanced-Research Weather Research and Forecasting (WRF-ARW) model. Met mast observations are used to evaluate the modeling skill for each computational domain. In general, turbulence-related variables such as the friction velocity and the sensible heat flux were better represented in the LES domains. However, the modeling error for variables such as wind speed and direction were usually smaller for the coarser mesoscale domains, despite the topographic flattening. On the other hand, the LES domains simulated flow features absent in coarser domains, such as the lee waves produced by the nocturnal jet. Therefore, more sensitivity studies are necessary to tap into the full potential of multiscale simulations using LES.
Keywords
WRF-LES, wind energy, Complex terrain, nocturnal jet, gravity current
