Using Ansys Fluid Flow software, a numerical investigation was to study the wind distribution around logistic sheds with a bridge vent. Then, were considered several wind directions - direct approaching, oblique, oblique opposing, lateral, and opposing - and neighborhood conditions. The Shear Stress Transport turbulence model and rectangular mesh were employed. The application validation of the CFD technique occurred in the logistic shed without a bridge vent, and the results showed good concordance with the literature. Results analyzed areas characterized by suction and overpressure, as well as the attachment points and the recirculation zones in the flow visualization.
A relevant analysis for the design of buildings is wind-induced loading. Although this has led to numerous studies, there have been relatively few investigations on the effects of parapets on wind loads. This systematic review addressed quantitative and qualitative behavior of wind loads in buildings with parapets in the Web of Science, ScienceDirect, SCOPUS, and Compendex databases. Using alternative methods such as citation searches and websites were selected 6 research articles were and added 6 papers. The results treat the influence of parapets on the behavior of the wind on roofs of low-rise buildings, especially wind loads, and its correlation with the building's geometric characteristics and parapets. The results identified pressure increases on roofs for low parapets (h<1.0 m); however, the dates vary according to the h/H ratio. Also, in general, the higher the parapets, the highest the reduction in the intensities of the pressure coefficients. Still, the porous and cantilevered parapets are more efficient and economically viable as a device to mitigate wind loads when compared to solid parapets in low buildings. Finally, for an open canopy, the height of the parapet is the main parameter, although the length of the building is also relevant.
This paper presents the numerical solution of transient two-dimensional convection-diffusion-reactions using the Sixth-Order Finite Difference Method. Considering the extension of the Taylor series, the first and second order derivatives from this physical problem are discretized with O(Δx6) accuracy. Using the L and L2 norm, the numerical solution is compared with some examples that have an analytical solution.
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