Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A Comparative study of neutral atmospheric boundary layer flow and dispersion using non-standard RANS models in OpenFoam and Ansys Fluent
Submission Author:
Juan Pablo de Lima Costa Salazar , SC , Brazil
Co-Authors:
Juan Pablo de Lima Costa Salazar, Roseane Albani
Presenter: Juan Pablo de Lima Costa Salazar
doi://10.26678/ABCM.COBEM2023.COB2023-0976
Abstract
In this work we investigate the implementation of a non-standard RANS k-e model in OpenFOAM and Ansys Fluent, previously proposed in the literature, in order to accurately simulate ABL flows with obstacles. The model consists of the addition of a source term in the turbulent kinetic energy dissipation equation of the RANS k-e model, which has the effect of inhibiting the development of stream-wise gradients in empty domains. In the presence of obstacles the model is supplemented by the use of a blending function, with the aim of smoothly deactivating the source term. Simulation results are compared to the CEDVAL A1-1 and A1-5 reference wind tunnel experiments. Our results show that both velocity profiles and source concentration distributions are satisfactorily reproduced by simulations, however turbulent kinetic energy is consistently overpredicted. Similar accuracy is observed between OpenFOAM and Ansys Fluent model implementations.
Keywords
atmospheric boundary layer, OpenFOAM, k-e model, Computational Fluid Dynamics, atmospheric dispersion, ANSYS Fluent
