Numerical calculation of the wind action on buildings using Eurocode 1 atmospheric boundary layer velocity profiles

Lopes, Mário; Conde, José Manuel Paixão; Gomes, Marcos V.C.; Ferreira, J.G.

doi:10.12989/was.2010.13.6.487

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…The initial average cold side temperature was set to 253.15 K while the initial average warm side temperature was 293.15 K. These temperatures were close to the validation temperatures, that is why it was chosen, the MSZ EN ISO 6946:2017 calculates for 263.15 K cold side temperature. The cold side temperature sensitivity dependenci was not in the scope of this paper [15,16].…”

Section: Boundariesmentioning

confidence: 94%

Relationship analysis of wall transmittance and wind speed with numerical method

Szodrai

2019

IRASE

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In heat transfer calculations, transmittance values are often used as a constant in practice. With the spread of dynamic simulations, it opens an opportunity to study the sensitivity of the external effects (e.g., wind speed) on buildings. With the proper amount of result, adequate simplifications can be made to reduce the duration of the simulations. In this paper several steady sate simulations were carried out by Ansys 19.1. Academic version. In the examined cases three building structures were examined with different thermal resistances. Average initial air temperature difference was applied on the two sides of the structures, at the cold side the wind speed was varied, while at the warm side natural convection was present. The surface temperatures and the heat flux were monitored and the transmittances were calculated as a result.

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Section: Boundariesmentioning

confidence: 94%

Relationship analysis of wall transmittance and wind speed with numerical method

Szodrai

2019

IRASE

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“…In the fluid domain a steady layered flow was intended to be set. Papers have discussed that the recommended turbulence model for 3D dimensions is the standard k-ε [20,[26][27][28]. In the previous paper [18] near wall flow hc was examined both with numerical simulation and with measurements.…”

Section: Figure 1 Sketch Of the Modelmentioning

confidence: 99%

Analysis of a wall structure thermal transmittance sensitivity in function of meteorological parameters at constant internal surface temperature

Szodrai

2020

Central European Symposium on Thermophysics 2020 (Cest 2020)

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The paper presents 231 thermal transmittance values of a wall structure in function of different meteorological parameters while the indoor surface temperature was kept constant. In the calculations a 2D wall of a nearly zero energy building was examined at the external air temperature, wind speed and solar radiation, in accordance with the Hungarian Decree on the Determination of the Energy Characteristics of Buildings, ISO 6946:2017 and with typical meteorological year dataset. Results were calculated with commercially available simulation software. The model assumed that the internal surface temperature was constant, the solar radiation is homogenous, the flow in front of the external wall surface did not contain any vortexes and the external wall surface was considered to be smooth. The goal was to showcase what are the influencing factors of the thermal transmittance values and give guidance estimating the yearly average of this value for a given location where surface cooling or heating is applied. The results were fitted linear function with 0.97 regressions that could be applied at dynamic parametric modelling.

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“…All these errors influence the accuracy of the simulation results. Fortunately, many scholars have demonstrated great consistency of these two methods after a lot of comparations between CFD test results and wind tunnel test results [21][22][23]. CFD can effectively capture important physical phenomena, such as vortex shedding, air separation, and backflow, especially for single buildings.…”

Section: Introductionmentioning

confidence: 99%

Review of Research Advances in CFD Techniques for the Simulation of Urban Wind Environments

Ju¹,

Li²,

Wang³

2022

Fluid Dynamics &Amp; Materials Processing

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Computational fluid dynamics (CFD) has become the main method for the prediction of the properties of the external wind environment in cities and other urban contexts. A review is presented of the existing literature in terms of boundary conditions, building models, computational domains, computational grids, and turbulence models. Some specific issues, such as the accuracy/computational cost ratio and the exploitation of existing empirical correlations, are also examined.

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Numerical calculation of the wind action on buildings using Eurocode 1 atmospheric boundary layer velocity profiles

Cited by 5 publications

References 10 publications

Relationship analysis of wall transmittance and wind speed with numerical method

Relationship analysis of wall transmittance and wind speed with numerical method

Analysis of a wall structure thermal transmittance sensitivity in function of meteorological parameters at constant internal surface temperature

Review of Research Advances in CFD Techniques for the Simulation of Urban Wind Environments

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