COMPARATIVE ANALYSIS OF TURBULENCE MODELS FOR SIMULATION OF WIND AND SNOW EFFECTS ON BUILDINGS AND STRUCTURES
Journal Title: Вчені записки Таврійського національного університету імені В. І. Вернадського. Серія: Технічні науки - Year 2018, Vol 29, Issue 6
Abstract
Numerical modeling of aerodynamic characteristics of various buildings and structures is quite difficult and resource-intensive task because of the design features of building objects, which, as a rule, have a complex geometric shape, and also because of the complex unsteady flow formed as a result of their flow around. Presence of a wind rose requires execution of a number of calculations, not a single one. The interference of the spectrum of different vortex structures and scales between different objects further complicates the task posed. Therefore, accurate simulation involves the use of an effective, well-tested and verified mathematical device with the use of high-performance computing. Therefore, accurate simulation involves the use of an effective, well-tested and verified mathematical device with the use of high-performance computing. Therefore, accurate simulation involves the use of an effective, well-tested and verified mathematical device with the use of high-performance computing. In recent years, the scientific direction in construction aerodynamics, connected with computer modeling of wind impact on buildings, is becoming relevant. An important role in this is played by the wide spread in the practice of building the construction of high-rise buildings of multi-span shells belonging to the category of unique structures. As an example, one can demonstrate turbulent flow around a single building object that has the shape of a cube. This problem is of particular interest for testing modern computational algorithms of computational fluid dynamics. In this work, a computational study of the influence of k-ε turbulence models, k-ε, k-ω, k_kl_ω, SST and LES, which are in service, on the flow of buildings is performed. The task of the study was to compare the data of numerical simulation with different models of turbulence between each other and with the experimental data. A comparative analysis showed that the turbulence models DBN and k_kl_ω and the large LES vortex method are in good agreement with the experiment in the wind tunnel.
Authors and Affiliations
В. В. Стоянов, Ш. Жгалли
Keywords
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