Principal Investigator

Dr. Sheikh Ahmad Zaki Bin Shaikh Salim
Universiti Teknologi Malaysia (UTM), Malaysia

ASEAN Co-Investigator

Gadjah Mada University (UGM)

Japanese Co-Investigator

Assoc. Prof. Dr. Aya HAGISHIMA Asst. Prof. Dr. Ikegaya NAOKI
Kyushu University

Awarded year



Collaborative Research Program for Common Regional Issues (CRC)


Energy Engineering


“The main purposes (objectives) of this project are :- i. To study wind flow structures within street canyons of the idealized residential areas with gable-roofed buildings; ii. To obtain the distribution of wall pressure coefficients on the windward and leeward building sides; iii. To analyze the relationship between the wall pressure coefficient and the aspect ratio of street canyon. The roughness of an urban surface, featured predominantly by buildings, has a major impact of wind flow, particularly in the canopy layer. Wind speed is reduced as it penetrates through the obstacles, thereby minimizing the mean kinetic energy [6]. This also influences the effectiveness of pressure-induced ventilation, which depends on the difference of wall pressure coefficients between windward and leeward sides. To understand factors related to the distribution of wall pressure coefficients, morphological parameters i.e. packing density and aspect ratio of street canyon are used. The former one is crucial for thorough analysis of pressure-induced ventilation while the latter one is most useful for detailed analysis of the generated contour of wall pressure coefficients, both on the windward and leeward building sides. Altogether, the understanding of pressure-induced ventilation in the urban canopy layer will be enhanced since other numerical studies have yet to attempt such a morphological approach. The scope of this project is the impact of residential urban morphology on wind flow structures and wall pressure coefficient. Buoyancy factor, which is more relevant in studying indoor ventilation, is excluded. However, there are limitations in terms of packing density since only three values are tested. Pertaining to the current condition of a real urban residential area (Kampung Baru), packing densities of less than 0.082 (sparse building coverage) and greater than 0.25 seem implausible. Therefore, the current limitation is necessary. “

Project at glance