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 . .

TY  - JOUR
AU  - Šarkić-Glumac, Anina
AU  - Hemida, Hassan
AU  - Höffer, Rüdiger
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2146
AB  - It is believed that the local topology has a significant effect on the wind flow pattern, wind velocity and turbulence intensity of the flow above the roof of buildings and thus is significantly influencing wind harvesting potential. This paper presents an experimental investigation, in which velocity field was measured above the roof of a high-rise building with a square cross section and height to width ratio of 1:3 surrounded by four buildings of the same geometry. In addition, the surface pressure was also measured. The flow above the roof was measured for different wind angles: 0 , 15 , 30 , and 45 . Results showed that there is a significant influence of the upstream building on the wind characteristics above the principal one. In general the wind angle of 45  is shown to be the most desirable angle for wind energy harvesting. The results of this work provide for the first time a database for the validation of computational fluid dynamic simulations for flat roof that will hopefully be used for more detailed investigations for urban wind energy harvesting.
PB  - Elsevier
T2  - Journal of Wind Engineering and Industrial Aerodynamics
T1  - Wind energy potential above a high-rise building influenced by neighboring buildings: An experimental investigation
VL  - 175
DO  - 10.1016/j.jweia.2018.01.022
ER  - 

@article{
author = "Šarkić-Glumac, Anina and Hemida, Hassan and Höffer, Rüdiger",
year = "2018",
abstract = "It is believed that the local topology has a significant effect on the wind flow pattern, wind velocity and turbulence intensity of the flow above the roof of buildings and thus is significantly influencing wind harvesting potential. This paper presents an experimental investigation, in which velocity field was measured above the roof of a high-rise building with a square cross section and height to width ratio of 1:3 surrounded by four buildings of the same geometry. In addition, the surface pressure was also measured. The flow above the roof was measured for different wind angles: 0 , 15 , 30 , and 45 . Results showed that there is a significant influence of the upstream building on the wind characteristics above the principal one. In general the wind angle of 45  is shown to be the most desirable angle for wind energy harvesting. The results of this work provide for the first time a database for the validation of computational fluid dynamic simulations for flat roof that will hopefully be used for more detailed investigations for urban wind energy harvesting.",
publisher = "Elsevier",
journal = "Journal of Wind Engineering and Industrial Aerodynamics",
title = "Wind energy potential above a high-rise building influenced by neighboring buildings: An experimental investigation",
volume = "175",
doi = "10.1016/j.jweia.2018.01.022"
}

Šarkić-Glumac, A., Hemida, H.,& Höffer, R.. (2018). Wind energy potential above a high-rise building influenced by neighboring buildings: An experimental investigation. in Journal of Wind Engineering and Industrial Aerodynamics
Elsevier., 175.
https://doi.org/10.1016/j.jweia.2018.01.022

Šarkić-Glumac A, Hemida H, Höffer R. Wind energy potential above a high-rise building influenced by neighboring buildings: An experimental investigation. in Journal of Wind Engineering and Industrial Aerodynamics. 2018;175.
doi:10.1016/j.jweia.2018.01.022 .

Šarkić-Glumac, Anina, Hemida, Hassan, Höffer, Rüdiger, "Wind energy potential above a high-rise building influenced by neighboring buildings: An experimental investigation" in Journal of Wind Engineering and Industrial Aerodynamics, 175 (2018),
https://doi.org/10.1016/j.jweia.2018.01.022 . .

TY  - CONF
AU  - Šarkić-Glumac, Anina
AU  - Hemida, Hassan
AU  - Kostadinović Vranešević, Kristina
AU  - Höffer, Rüdiger
PY  - 2015
UR  - http://www.winercost.com/cost_files/WINERCOST_Workshop_Coimbra_FINAL_PROCEEDINGS.PDF
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2108
AB  - In order to increase wind energy harvesting from urban environment, the wind be- havior and the effect of the surrounding buildings needs to be fully understood. In this paper, wind tunnel experiments of the flow around a high-rise building with a height to width ratio of 3:1 surrounded by four high-rise buildings of the same geometry were performed to investigate the interference effect on the above roof flow. The buildings were mounted in an environmental boundary layer resembling that of a built environment and velocity measurements over the top of the principal building were performed. Four different wind angles, with respect to the side of the high-rise building, were investigated experimentally; 0°, 15°, 30°, and 45°.
C3  - Workshop: Tends and Challenges for Wind Energy Harvesting
T1  - Experimental investigation of interference effect of high-rise buildings for wind energy extraction
EP  - 66
SP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2108
ER  - 

@conference{
author = "Šarkić-Glumac, Anina and Hemida, Hassan and Kostadinović Vranešević, Kristina and Höffer, Rüdiger",
year = "2015",
abstract = "In order to increase wind energy harvesting from urban environment, the wind be- havior and the effect of the surrounding buildings needs to be fully understood. In this paper, wind tunnel experiments of the flow around a high-rise building with a height to width ratio of 3:1 surrounded by four high-rise buildings of the same geometry were performed to investigate the interference effect on the above roof flow. The buildings were mounted in an environmental boundary layer resembling that of a built environment and velocity measurements over the top of the principal building were performed. Four different wind angles, with respect to the side of the high-rise building, were investigated experimentally; 0°, 15°, 30°, and 45°.",
journal = "Workshop: Tends and Challenges for Wind Energy Harvesting",
title = "Experimental investigation of interference effect of high-rise buildings for wind energy extraction",
pages = "66-57",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2108"
}

Šarkić-Glumac, A., Hemida, H., Kostadinović Vranešević, K.,& Höffer, R.. (2015). Experimental investigation of interference effect of high-rise buildings for wind energy extraction. in Workshop: Tends and Challenges for Wind Energy Harvesting, 57-66.
https://hdl.handle.net/21.15107/rcub_grafar_2108

Šarkić-Glumac A, Hemida H, Kostadinović Vranešević K, Höffer R. Experimental investigation of interference effect of high-rise buildings for wind energy extraction. in Workshop: Tends and Challenges for Wind Energy Harvesting. 2015;:57-66.
https://hdl.handle.net/21.15107/rcub_grafar_2108 .

Šarkić-Glumac, Anina, Hemida, Hassan, Kostadinović Vranešević, Kristina, Höffer, Rüdiger, "Experimental investigation of interference effect of high-rise buildings for wind energy extraction" in Workshop: Tends and Challenges for Wind Energy Harvesting (2015):57-66,
https://hdl.handle.net/21.15107/rcub_grafar_2108 .

TY  - JOUR
AU  - Šarkić-Glumac, Anina
AU  - Fisch, Rupert
AU  - Höffer, Rüdiger
AU  - Bletzinger, Kai-Uwe
PY  - 2012
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2147
AB  - This paper presents the results of numerical investigations of bridge aeroelasticity. In particular static
coefficients and instationary flutter derivatives for a symmetric bridge deck section using the Unsteady
Reynolds-Averaged Navier–Stokes (URANS) method are obtained. The numerical model uses the Finite
Volume discretization. The performed simulations are two-dimensional, and the turbulence is simulated by
the k–o-SST model. The numerical model is validated by force and pressure measurements from wind
tunnel experiments. The main goal of this work is to assess the capability of the numerically affordable
URANS method for estimating bridge flutter derivatives. In general the simulated aeroelastic surface
pressures and integrated forces are in good accordance with the aeroelastic pressure fields and forces
identified from comparative wind tunnel tests. This is particularly the case in the range of moderate
reduced velocities and for flow effects without dominant vortex shedding. The results demonstrate the
capability of the URANS method to derive bridge flutter derivatives and static coefficients in a numerically
effective and efficient way.
PB  - Elsevier
T2  - Journal of Wind Engineering and Industrial Aerodynamics
T1  - Bridge flutter derivatives based on computed, validated pressure fields
VL  - 104-106
VL  - 0167-6105
DO  - 10.1016/j.jweia.2012.02.033
ER  - 

@article{
author = "Šarkić-Glumac, Anina and Fisch, Rupert and Höffer, Rüdiger and Bletzinger, Kai-Uwe",
year = "2012",
abstract = "This paper presents the results of numerical investigations of bridge aeroelasticity. In particular static
coefficients and instationary flutter derivatives for a symmetric bridge deck section using the Unsteady
Reynolds-Averaged Navier–Stokes (URANS) method are obtained. The numerical model uses the Finite
Volume discretization. The performed simulations are two-dimensional, and the turbulence is simulated by
the k–o-SST model. The numerical model is validated by force and pressure measurements from wind
tunnel experiments. The main goal of this work is to assess the capability of the numerically affordable
URANS method for estimating bridge flutter derivatives. In general the simulated aeroelastic surface
pressures and integrated forces are in good accordance with the aeroelastic pressure fields and forces
identified from comparative wind tunnel tests. This is particularly the case in the range of moderate
reduced velocities and for flow effects without dominant vortex shedding. The results demonstrate the
capability of the URANS method to derive bridge flutter derivatives and static coefficients in a numerically
effective and efficient way.",
publisher = "Elsevier",
journal = "Journal of Wind Engineering and Industrial Aerodynamics",
title = "Bridge flutter derivatives based on computed, validated pressure fields",
volume = "104-106, 0167-6105",
doi = "10.1016/j.jweia.2012.02.033"
}

Šarkić-Glumac, A., Fisch, R., Höffer, R.,& Bletzinger, K.. (2012). Bridge flutter derivatives based on computed, validated pressure fields. in Journal of Wind Engineering and Industrial Aerodynamics
Elsevier., 104-106.
https://doi.org/10.1016/j.jweia.2012.02.033

Šarkić-Glumac A, Fisch R, Höffer R, Bletzinger K. Bridge flutter derivatives based on computed, validated pressure fields. in Journal of Wind Engineering and Industrial Aerodynamics. 2012;104-106.
doi:10.1016/j.jweia.2012.02.033 .

Šarkić-Glumac, Anina, Fisch, Rupert, Höffer, Rüdiger, Bletzinger, Kai-Uwe, "Bridge flutter derivatives based on computed, validated pressure fields" in Journal of Wind Engineering and Industrial Aerodynamics, 104-106 (2012),
https://doi.org/10.1016/j.jweia.2012.02.033 . .