Steady-state CFD modelling and experimental analysis of the local microclimate in Dubai (UAE)

Fatima, Syeda Firdaus; Chaudhry, Hassam Nasarullah

doi:10.1051/sbuild/2017001

Cited by 8 publications

(10 citation statements)

References 15 publications

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“…Fatima et al (2017) simulated the temperature and wind field with a CFD approach and performed a comparative analysis based on a field measurement dataset. The average temperature deviation was 11%, and the average wind speed deviation was 19% [ 46 ]. These results indicated that the distribution of and changes in the urban space thermal and wind environment were predicted with high accuracy based on the CFD model.…”

Section: Cfd-based Simulation Methods For the Ustementioning

confidence: 99%

“…Dimoudi et al (2014) changed the roads and streets in a model from cement mixed with clay to cold materials, used CFD to simulate the temperature field distribution, and found that the surface temperature dropped by 6.5 °C [ 92 ]. According to the results of CFD simulations of wind and heat environments, Fatima et al (2017) found that hot spots in high-temperature areas in cities have a certain correlation with low wind speeds [ 46 ]. Undeveloped areas, such as natural soil, grassland, woodland, and cultivated land areas that have been artificially developed, are characterized by good water permeability and can convert absorbed solar radiation energy into latent heat energy, which can effectively mitigate the rate of increase in surface temperature.…”

Section: Quantitative Simulations Of the Uste Based On Cfd Considering The Underlying Surface Dynamicsmentioning

confidence: 99%

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Simulation of the Urban Space Thermal Environment Based on Computational Fluid Dynamics: A Comprehensive Review

Huo

Chen

Geng

et al. 2021

Sensors

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Rapid urbanization has made urban space thermal environment (USTE) problems increasingly prominent. USTE research is important for improving urban ecological environment and building energy consumption. Most studies on USTE research progress have focused on meteorological observations and remote sensing methods, and few studies on USTE are based on computational fluid dynamics (CFD). During the past two decades, with the increasing applications of CFD in USTE research, comprehensively summarizing the phased results have become necessary tasks. This paper analyzes the current research status of CFD-based USTE simulation from six perspectives. First, we summarize the current research status of USTE simulation with CFD models that integrate ground observations and remote sensing technology. Second, we define and classify the spatial scope of CFD-based USTE simulations at different scales. Third, we systematically analyze the quantitative relationships among urban land type, the underlying surface structure, water bodies, green space and the corresponding changes in CFD-based USTE simulations. Fourth, we quantitatively analyze the impact of anthropogenic heat in CFD-based USTE simulations. Fifth, we summarize the corresponding USTE mitigation measures and methods based on the CFD simulation results. Finally, the outlooks and the existing problems in current research on CFD simulations of the USTE are analyzed.

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Section: Cfd-based Simulation Methods For the Ustementioning

confidence: 99%

Section: Quantitative Simulations Of the Uste Based On Cfd Considering The Underlying Surface Dynamicsmentioning

confidence: 99%

Simulation of the Urban Space Thermal Environment Based on Computational Fluid Dynamics: A Comprehensive Review

Huo

Chen

Geng

et al. 2021

Sensors

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“…Considering the simplifications assumed by the VOF method, which are related to its computational efficiency, the 20% error for the liquid holdup and 12% for the pressure drop was considered acceptable. This was also based on the fact that in CFD studies, especially of multiphase flow or gas modeling, an error of up to 20% or even 30% is not unusual (Guerrero et al, 2017;Fatima and Chaudhry, 2017;Rivas et al, 2019).…”

Section: Experimental Comparisonmentioning

confidence: 99%

CFD study and experimental validation of low liquid-loading flow assurance in oil and gas transport: studying the effect of fluid properties and operating conditions on flow variables

Martínez

Pereyra

Ratkovich

2020

Heliyon

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Low liquid-loading flow frequently occurs during the transport of gas products in various industries, such as in the Oil & Gas, the Food, and the Pharmaceutical Industries. Even small amounts of liquid can have a significant effect on the flow conditions inside the pipeline, such as increased pressure loss, pipe wall stresses and corrosion, and liquid holdup along the pipeline. However, most studies that analyze this type of flow only use atmospheric pressures and horizontal 1-in or 2-in pipes, which do not accurately represent the range of operating conditions present in industrial applications. Therefore, this study focused on modeling low liquid-loading flow in mediumsized (6-10 in) pipes, using CFD simulations and experimental data from the University of Tulsa, and then applying it to real operating conditions from a Colombian gas pipeline. An acceptable difference was observed between experimental and CFD data, both for the liquid holdup (18%) and for the pressure drop (12%). Variables like pressure drop and wall shear stress increase with phase velocity, operating pressure, and pipe inclination. Liquid holdup increases with liquid velocity but decreases with all other factors. The relation of flow variables with phase velocities is of particular interest: Doubling the gas velocity decreased holdup 70% and increased pressure drop tenfold. On the other hand, the presence of the liquid phase seems to be more influential on process variables than its exact flowrate; the introduction of the liquid phase to a single-phase gas causes an increase in pressure loss by a factor of three, but doubling the liquid velocity only increases the pressure loss by a further 30%.

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“…The interactions between the urban environment and the stadium structures as well as the wind comfort conditions on pedestrian level have also attracted great interest [10][11][12]. Finally, thermal comfort studies, employing dynamic thermal modelling and CFD techniques, were also conducted to assess thermal discomfort and temperature distribution on stadia [2,[13][14][15]41] and energy consumption requirements [16,17,42].…”

Section: Previous Related Workmentioning

confidence: 99%

“…The algorithm performs an elitist non-dominated sorting according to the set objectives. The theoretical background can be found in [39,41].…”

Section: Output Parametermentioning

confidence: 99%

CFD optimisation of a stadium roof geometry: a qualitative study to improve the wind microenvironment

2017

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Abstract. The complexity of the built environment requires the adoption of coupled techniques to predict the flow phenomena and provide optimum design solutions. In this study, coupled computational fluid dynamics (CFD) and response surface methodology (RSM) optimisation tools are employed to investigate the parameters that determine the wind comfort in a two-dimensional stadium model, by optimising the roof geometry. The roof height, width and length are evaluated against the flow homogeneity at the spectator terraces and the playing field area, the roof flow rate and the average interior pressure. Based on non-parametric regression analysis, both symmetric and asymmetric configurations are considered for optimisation. The optimum design solutions revealed that it is achievable to provide an improved wind environment in both playing field area and spectator terraces, giving a further insight on the interrelations of the parameters involved. Considering the limitations of conducting a twodimensional study, the obtained results may beneficially be used as a basis for the optimisation of a complex threedimensional stadium structure and thus become an important design guide for stadium structures.

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Steady-state CFD modelling and experimental analysis of the local microclimate in Dubai (UAE)

Cited by 8 publications

References 15 publications

Simulation of the Urban Space Thermal Environment Based on Computational Fluid Dynamics: A Comprehensive Review

Simulation of the Urban Space Thermal Environment Based on Computational Fluid Dynamics: A Comprehensive Review

CFD study and experimental validation of low liquid-loading flow assurance in oil and gas transport: studying the effect of fluid properties and operating conditions on flow variables

CFD optimisation of a stadium roof geometry: a qualitative study to improve the wind microenvironment

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