scholarly journals Response of Outdoor Thermal Environment to Small Changes in Three-Dimensional Urban Morphology – a Case Study of Adding Elevators to a Residential Quarter in Xuzhou City, China

2021 ◽  
Author(s):  
Hongxuan Zhou ◽  
Guixin Tao ◽  
Biao Ge ◽  
Xinye Yan ◽  
Jing Sun
Keyword(s):  
Thermal Environment ◽  
Three Dimensional ◽  
Urban Morphology ◽  
Outdoor Thermal Environment ◽  
Xuzhou City ◽  
Residential Quarter

scholarly journals Tourists’ Thermal Experience and Health in a Commercial Pedestrianized Block: A Case Study in a Hot and Humid Region of Southern China

2019 ◽  
Vol 16 (24) ◽  
pp. 5072 ◽  
Author(s):  
Lei Zhang ◽  
Xuan Ma ◽  
Jingyuan Zhao ◽  
Mengying Wang
Keyword(s):  
Numerical Simulation ◽  
Public Space ◽  
Field Measurement ◽  
Thermal Environment ◽  
Southern China ◽  
Tourism Industry ◽  
Outdoor Thermal Environment ◽  
Humid Region

With the development of the economy in China, the tourism industry has become a form of daily entertainment for citizens. Commercial pedestrianized blocks have been designed as recreational centers for tourists, serving as outdoor public space and scenic spots. The use of these regions is directly determined by the outdoor thermal environment. So far, few studies have been conducted on tourists’ thermal experience in commercial pedestrianized blocks, especially in the hot and humid region of southern China. Using field measurement and numerical simulation of a commercial pedestrianized block in Fo Shan, China, to research tourists’ thermal experience under different conditions, the final results of this study could help to select the most suitable time for tourist travel and help local managers to improve the thermal environment.

scholarly journals Extending the concept of the morphological frame: a case study of Tangshan old military airport

2017 ◽  
Author(s):  
Feng Song ◽  
Rongxi Peng ◽  
Zijiao Zhang ◽  
Yixi Li
Keyword(s):  
Urban Form ◽  
Three Dimensional ◽  
Urban Morphology ◽  
Morphological Transformation ◽  
Ground Plan ◽  
Plan Analysis ◽  
Peking University ◽  
Social Use ◽  
The Impact

Extending the concept of the morphological frame: a case study of Tangshan old military airport Rongxi Peng, Zijiao Zhang, Yixi Li, Feng Song* College of Urban and Environmental Sciences, Peking University. 100871 Beijing E-mail: [email protected], [email protected], [email protected], [email protected]*(corresponding author)Telephone Number: +86 132-6990-0350, +86 139-1013-6101* Keywords: China, morphological frame, three-dimensional view, airport Conference topics and scale: Urban form and social use of space/ City transformations/ Stages in territorial configuration   The concept of the morphological frame is important in urban morphology, but it has been discussed much less than other critical concepts, such as the fringe belt and the fixation line.  Passing its features on as inherited outlines, the morphological frame contains not only the linear fixation line, but also ground plan and three-dimensional aspects.  In this research, the linear, ground plan, and three-dimensional morphological frame of Tangshan old military airport during the expansion of the city after the removal of the airport is identified.  The former boundary roads of the airport exert obvious influences on the division of plots.  The former arterial roads also function as a linear morphological frame.  In relation to the ground plan, property rights and plots containing important buildings have an impact on the consequent town plan.  The distinct feature of the morphological frame of the airport is its three-dimensional constraint, i.e. the vertical clearance requirement, which restricted the height of surrounding buildings.  The impact of this institutional limit can last a very long time owing to the high cost of demolishing the old surrounding buildings or adding extra storeys even if the limit ceased to exist with the removal of the airport.  Based on this case study, this paper refines and extends the connotation of the concept of the morphological frame and further discusses the relationship between function and form.   References Conzen, M. P. (2009) ‘How cities internalize their former urban fringes: a cross-cultural comparison’, Urban Morphology 13(1), 29. Conzen, M. R. G. (1969) Alnwick, Northumberland: a study in town-plan analysis (Institute of British Geographers, London). Lin, Y., De Meulder, B. and Wang, S. (2011) ‘From village to metropolis: a case of morphological transformation in Guangzhou, China’, Urban Morphology 15(1), 5-20. Whitehand, J. W. R. (2001) ‘British urban morphology: the Conzenion tradition’, Urban Morphology 5(2), 103-109. Whitehand, J. W. R., Conzen, M. P. and Gu, K. (2016) ‘Plan analysis of historical cities: a Sino-European comparison’, Urban Morphology 20(2), 139-158.

Simulation Study on Effect of Piloti on Outdoor Thermal Environment of Campus Cluster in Guangzhou

2013 ◽  
Vol 368-370 ◽  
pp. 1888-1893
Author(s):  
Guang Chen ◽  
Li Hua Zhao ◽  
Qiong Li
Keyword(s):  
Simulation Study ◽  
Climate Model ◽  
Thermal Environment ◽  
Design Method ◽  
Three Dimensional ◽  
Outdoor Thermal Environment ◽  
Teachers And Students ◽  
Important Design

The piloti is one of the important design method of LingNan architecture to adapt to the climate, piloti space is an important space meet the communication between teachers and students. The three-dimensional non-hydrostatic climate model ENVI-met were applied to simulate differents of heights of piloti and proportion of piloti. Study the effect of different cases of piloti on campus cluster thermal environment.

scholarly journals Quantitative Study of Using Piloti for Passive Climate Adaptability in a Hot-Summer and Cold-Winter City in China

2018 ◽  
Vol 15 (10) ◽  
pp. 2202 ◽  
Author(s):  
Zeng Zhou ◽  
Qinli Deng ◽  
Guang Yang ◽  
Yaolin Lin
Keyword(s):  
Wind Velocity ◽  
Climate Adaptation ◽  
Thermal Environment ◽  
Three Dimensional ◽  
Winter Season ◽  
Simulation Method ◽  
Cold Winter ◽  
Climate Adaptability ◽  
Outdoor Thermal Environment ◽  
Radiant Temperature

There has been an insufficient study of passive climate adaptability that considers both the summer and winter season for the outdoor thermal environment of hot-summer and cold-winter cities. In this study, we performed a quantitative simulation to research the passive climate adaptability of a residential area, considering piloti as the main method for climate adaptation in a hot-summer and cold-winter city in China. Numerical simulations were performed with a coupled simulation method of convection, radiation, and conduction. A cubic non-linear k–ε model proposed by Craft et al. was selected as the turbulence model and three-dimensional multi-reflections of shortwave and longwave radiations were considered in the radiation simulation. Through the simulation, we found that setting the piloti at the two ends of the building was the optimal piloti arrangement for climate adaptation. Then the relationship between the piloti ratio (0%, 20%, 40%, 60%, and 80%) and the outdoor thermal environment was studied. It could be concluded that with the increasing piloti ratio, the wind velocity increased, the mean radiant temperature (MRT) decreased slightly, and the average standard effective temperature (SET*) decreased to 3.6 °C in summer, while in winter, with the increasing piloti ratio, the wind velocity, MRT, and SET* changed slightly. The wind environment significantly affected the SET* value, and the piloti ratio should be between 12% and 38% to avoid wind-induced discomfort.

scholarly journals STUDY ON EFFECT OF GREENING ON OUTDOOR THERMAL ENVIRONMENT USING THREE DIMENSIONAL PLANT CANOPY MODEL

2000 ◽  
Vol 65 (536) ◽  
pp. 87-94 ◽  
Author(s):  
Shinji YOSHIDA ◽  
Ryozo OOKA ◽  
Akashi MOCHIDA ◽  
Yoshihide TOMINAGA ◽  
Shuzo MURAKAMI
Keyword(s):  
Thermal Environment ◽  
Three Dimensional ◽  
Plant Canopy ◽  
Outdoor Thermal Environment ◽  
Canopy Model

A Rapid and Reliable Numerical Method for Predictions of Outdoor Thermal Environment in Actual Urban Areas

2013 ◽  
Author(s):  
Jiying Liu ◽  
Jelena Srebric ◽  
Nanyang Yu
Keyword(s):  
Urban Area ◽  
Turbulence Model ◽  
Urban Areas ◽  
Thermal Environment ◽  
Urban Morphology ◽  
Outdoor Environment ◽  
Transfer Coefficients ◽  
Air Temperatures ◽  
Outdoor Thermal Environment ◽  
Wall Boundary Conditions

To analyze urban thermal environments more rapidly and accurately, a real urban morphology is simulated. Two models are proposed to support Reynolds Averaged Navier Stokes (RANS) simulations including: (1) a Zero-equation (ZEQ) turbulence model for outdoor airflows, and (2) convective heat transfer coefficients (CHTC) on external building surfaces. This study used commercial Computational Fluid Dynamics (CFD) software to implement the newly derived ZEQ turbulence model and CHTC wall boundary conditions. This modified version of CFD software was used to predict the thermal environment of an actual urban area including air temperatures and wind velocities. The simulated air velocities around the buildings are compared with the velocities obtained with the standard k-ε (SKE) turbulence model. The air temperatures around the buildings were compared with measured data in the actual outdoor environment. The comparisons show that this simulation method can rapidly and reliably predict a real outdoor thermal environment in an urban area.

Construction of plastic contact deformation maps on ceramics: a case study on aluminum nitride

1996 ◽  
Vol 54 ◽  
pp. 636-637
Author(s):  
D. L. Callahan
Keyword(s):  
Plastic Deformation ◽  
Aluminum Nitride ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Bright Field Image ◽  
Perfectly Plastic ◽  
Contrast Analysis ◽  
Deformation Patterns

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.

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