TY  - JOUR
AU  - Kostadinović Vranešević, Kristina
AU  - Vita, Giulio
AU  - Bordas, Stephane
AU  - Šarkić Glumac, Anina
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2694
AB  - To understand the favourable locations for maximum yield of urban wind energy, understanding the flow pattern on the roof region of high-rise buildings is crucial. However, very few studies in the literature report on the wind energy resource using high-fidelity methods, which combined with the lack of wind tunnel investigations, explains the failure of urban wind energy as a viable contributor to the renewable energy mix. This work aims at proposing a strategy for the reliable evaluation of the wind energy resource by building on validated Large Eddy Simulation and performance maps based on the wind power density and the turbulence intensity above the roof of a prismatic 1:3 square building. Analyses include the effect of flat and decked roof shapes in two wind directions. Results around the facade reveal zones of accelerated flow close to separation edges, while above the roof, a higher potential is noticeable at 45◦, than at 0◦. Decking of the roof shows insensitivity to the change in wind direction. The tested methodology can be extended to other configurations to predict the wind energy potential as well as used to indicate the positioning of wind turbines in the built environment.
PB  - Elsevier
T2  - Journal of Wind Engineering & Industrial Aerodynamics
T1  - Furthering knowledge on the flow pattern around high-rise buildings: LES investigation of the wind energy potential
SP  - 105029
VL  - 226
DO  - 10.1016/j.jweia.2022.105029
ER  - 

@article{
author = "Kostadinović Vranešević, Kristina and Vita, Giulio and Bordas, Stephane and Šarkić Glumac, Anina",
year = "2022",
abstract = "To understand the favourable locations for maximum yield of urban wind energy, understanding the flow pattern on the roof region of high-rise buildings is crucial. However, very few studies in the literature report on the wind energy resource using high-fidelity methods, which combined with the lack of wind tunnel investigations, explains the failure of urban wind energy as a viable contributor to the renewable energy mix. This work aims at proposing a strategy for the reliable evaluation of the wind energy resource by building on validated Large Eddy Simulation and performance maps based on the wind power density and the turbulence intensity above the roof of a prismatic 1:3 square building. Analyses include the effect of flat and decked roof shapes in two wind directions. Results around the facade reveal zones of accelerated flow close to separation edges, while above the roof, a higher potential is noticeable at 45◦, than at 0◦. Decking of the roof shows insensitivity to the change in wind direction. The tested methodology can be extended to other configurations to predict the wind energy potential as well as used to indicate the positioning of wind turbines in the built environment.",
publisher = "Elsevier",
journal = "Journal of Wind Engineering & Industrial Aerodynamics",
title = "Furthering knowledge on the flow pattern around high-rise buildings: LES investigation of the wind energy potential",
pages = "105029",
volume = "226",
doi = "10.1016/j.jweia.2022.105029"
}

Kostadinović Vranešević, K., Vita, G., Bordas, S.,& Šarkić Glumac, A.. (2022). Furthering knowledge on the flow pattern around high-rise buildings: LES investigation of the wind energy potential. in Journal of Wind Engineering & Industrial Aerodynamics
Elsevier., 226, 105029.
https://doi.org/10.1016/j.jweia.2022.105029

Kostadinović Vranešević K, Vita G, Bordas S, Šarkić Glumac A. Furthering knowledge on the flow pattern around high-rise buildings: LES investigation of the wind energy potential. in Journal of Wind Engineering & Industrial Aerodynamics. 2022;226:105029.
doi:10.1016/j.jweia.2022.105029 .

Kostadinović Vranešević, Kristina, Vita, Giulio, Bordas, Stephane, Šarkić Glumac, Anina, "Furthering knowledge on the flow pattern around high-rise buildings: LES investigation of the wind energy potential" in Journal of Wind Engineering & Industrial Aerodynamics, 226 (2022):105029,
https://doi.org/10.1016/j.jweia.2022.105029 . .

TY  - JOUR
AU  - Vita, Giulio
AU  - Šarkić-Glumac, Anina
AU  - Hemida, Hassan
AU  - Salvadori, Simone
AU  - Baniotopoulos, Charalampos
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2117
AB  - One of the main challenges of urban wind energy harvesting is the understanding of the flow characteristics where urban wind turbines are to be installed. Among viable locations within the urban environment, high-rise buildings are particularly promising due to the elevated height and relatively undisturbed wind conditions. Most research studies on high-rise buildings deal with the calculation of the wind loads in terms of surface pressure. In the present paper, flow pattern characteristics are investigated for a typical high-rise building in a variety of configurations and wind directions in wind tunnel tests. The aim is to improve the understanding of the wind energy resource in the built environment and give designers meaningful data on the positioning strategy of wind turbines to improve performance. In addition, the study provides suitable and realistic turbulence characteristics to be reproduced in physical or numerical simulations of urban wind turbines for several locations above the roof region of the building. The study showed that at a height of 10 m from the roof surface, the flow resembles atmospheric turbulence with an enhanced turbulence intensity above 10% combined with large length scales of about 200 m. Results also showed that high-rise buildings in clusters might provide a very suitable configuration for the installation of urban wind turbines, although there is a strong difference between the performance of a wind turbine installed at the centre of the roof and one installed on the leeward and windward corners or edges, depending on the wind direction.
PB  - MDPI
T2  - Energies
T1  - On the Wind Energy Resource above High-Rise Buildings
VL  - 13
DO  - 10.3390/en13143641
ER  - 

@article{
author = "Vita, Giulio and Šarkić-Glumac, Anina and Hemida, Hassan and Salvadori, Simone and Baniotopoulos, Charalampos",
year = "2020",
abstract = "One of the main challenges of urban wind energy harvesting is the understanding of the flow characteristics where urban wind turbines are to be installed. Among viable locations within the urban environment, high-rise buildings are particularly promising due to the elevated height and relatively undisturbed wind conditions. Most research studies on high-rise buildings deal with the calculation of the wind loads in terms of surface pressure. In the present paper, flow pattern characteristics are investigated for a typical high-rise building in a variety of configurations and wind directions in wind tunnel tests. The aim is to improve the understanding of the wind energy resource in the built environment and give designers meaningful data on the positioning strategy of wind turbines to improve performance. In addition, the study provides suitable and realistic turbulence characteristics to be reproduced in physical or numerical simulations of urban wind turbines for several locations above the roof region of the building. The study showed that at a height of 10 m from the roof surface, the flow resembles atmospheric turbulence with an enhanced turbulence intensity above 10% combined with large length scales of about 200 m. Results also showed that high-rise buildings in clusters might provide a very suitable configuration for the installation of urban wind turbines, although there is a strong difference between the performance of a wind turbine installed at the centre of the roof and one installed on the leeward and windward corners or edges, depending on the wind direction.",
publisher = "MDPI",
journal = "Energies",
title = "On the Wind Energy Resource above High-Rise Buildings",
volume = "13",
doi = "10.3390/en13143641"
}

Vita, G., Šarkić-Glumac, A., Hemida, H., Salvadori, S.,& Baniotopoulos, C.. (2020). On the Wind Energy Resource above High-Rise Buildings. in Energies
MDPI., 13.
https://doi.org/10.3390/en13143641

Vita G, Šarkić-Glumac A, Hemida H, Salvadori S, Baniotopoulos C. On the Wind Energy Resource above High-Rise Buildings. in Energies. 2020;13.
doi:10.3390/en13143641 .

Vita, Giulio, Šarkić-Glumac, Anina, Hemida, Hassan, Salvadori, Simone, Baniotopoulos, Charalampos, "On the Wind Energy Resource above High-Rise Buildings" in Energies, 13 (2020),
https://doi.org/10.3390/en13143641 . .

TY  - JOUR
AU  - Hemida, Hassan
AU  - Šarkić-Glumac, Anina
AU  - Vita, Giulio
AU  - Kostadinović Vranešević, Kristina
AU  - Höffer, Rüdiger
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2112
AB  - The human migration from rural to urban areas has triggered a chain reaction causing the spiking energy demand of cities worldwide. High-rise buildings filling the urban skyline could potentially provide a means to improve the penetration of renewable wind energy by installing wind turbines at their rooftop. However, the above roof flow region has not received much attention and most results deal with low-rise buildings. This study investigates the flow pattern above the roof of a high-rise building by analysing velocity and pressure measurements performed in an atmospheric boundary layer wind tunnel, including four wind directions and two different roof shapes. Comparison of the surface pressure patterns on the flat roof with available low-rise building studies shows that the surface pressure contours are consistent for a given wind direction. At 0◦ wind direction, a separation bubble is detected, while cone vortices dominate at 30◦ and 45◦. The determining factor for the installation of small wind turbines is the vicinity to the roof. Thus, 45◦ wind direction shows to be the most desirable angle by bringing the substantial amplification of wind and keeping the turbulence intensity low. Decking the roof creates favourable characteristics by overcoming the sensitivity to the wind direction while preserving the speed-up effect.
PB  - MDPI
T2  - Applied Sciences
T1  - On the Flow over High-rise Building for Wind Energy Harvesting: An Experimental Investigation of Wind Speed and Surface Pressure
VL  - 10
DO  - 10.3390/app10155283
ER  - 

@article{
author = "Hemida, Hassan and Šarkić-Glumac, Anina and Vita, Giulio and Kostadinović Vranešević, Kristina and Höffer, Rüdiger",
year = "2020",
abstract = "The human migration from rural to urban areas has triggered a chain reaction causing the spiking energy demand of cities worldwide. High-rise buildings filling the urban skyline could potentially provide a means to improve the penetration of renewable wind energy by installing wind turbines at their rooftop. However, the above roof flow region has not received much attention and most results deal with low-rise buildings. This study investigates the flow pattern above the roof of a high-rise building by analysing velocity and pressure measurements performed in an atmospheric boundary layer wind tunnel, including four wind directions and two different roof shapes. Comparison of the surface pressure patterns on the flat roof with available low-rise building studies shows that the surface pressure contours are consistent for a given wind direction. At 0◦ wind direction, a separation bubble is detected, while cone vortices dominate at 30◦ and 45◦. The determining factor for the installation of small wind turbines is the vicinity to the roof. Thus, 45◦ wind direction shows to be the most desirable angle by bringing the substantial amplification of wind and keeping the turbulence intensity low. Decking the roof creates favourable characteristics by overcoming the sensitivity to the wind direction while preserving the speed-up effect.",
publisher = "MDPI",
journal = "Applied Sciences",
title = "On the Flow over High-rise Building for Wind Energy Harvesting: An Experimental Investigation of Wind Speed and Surface Pressure",
volume = "10",
doi = "10.3390/app10155283"
}

Hemida, H., Šarkić-Glumac, A., Vita, G., Kostadinović Vranešević, K.,& Höffer, R.. (2020). On the Flow over High-rise Building for Wind Energy Harvesting: An Experimental Investigation of Wind Speed and Surface Pressure. in Applied Sciences
MDPI., 10.
https://doi.org/10.3390/app10155283

Hemida H, Šarkić-Glumac A, Vita G, Kostadinović Vranešević K, Höffer R. On the Flow over High-rise Building for Wind Energy Harvesting: An Experimental Investigation of Wind Speed and Surface Pressure. in Applied Sciences. 2020;10.
doi:10.3390/app10155283 .

Hemida, Hassan, Šarkić-Glumac, Anina, Vita, Giulio, Kostadinović Vranešević, Kristina, Höffer, Rüdiger, "On the Flow over High-rise Building for Wind Energy Harvesting: An Experimental Investigation of Wind Speed and Surface Pressure" in Applied Sciences, 10 (2020),
https://doi.org/10.3390/app10155283 . .