PARAMETRIC CFD-BASED ASSESSMENT OF URBAN GEOMETRY FOR BIOCLIMATIC DESIGN

Shanzae Naeem; Hafsa  Mir Jan; Mahrukh  Rehman Mirza; Shahira Nasir

doi:10.46662/jass.v13i1.593

Shanzae Naeem Lecturer, University of Lahore
Hafsa Mir Jan Lecturer, University of Lahore
Mahrukh Rehman Mirza Assistant Professor, University of Lahore
Shahira Nasir Lecturer, University of Lahore

DOI: https://doi.org/10.46662/jass.v13i1.593

Keywords: Bio-Climatic design, Geomatric structutes, Energy budget, Wind Forces, Parametric CFD simulation, Wind responsive

Abstract

The rapid growth of Pakistan's urban areas, especially large cities such as Lahore, poses many challenges for their infrastructure and natural resources. With the increased construction of buildings and the crowding of the urban areas, the urban environment becomes hotter and less pleasant, and air quality worsens. For cities located in hot semi-arid regions, their form plays a crucial role in wind and urban outdoor temperatures. That is why it is critical to apply bio-climatic principles when considering climate parameters in urban development.This research investigates the influence of urban geometry on wind flow and aims to develop simulation-supported guidelines for bio-climatic urban design in hot, semi-arid climates. The study critically reviews the existing research on bio-climatic urban design , categorized into geometric structures, vegetation and construction with different coating materials with computer modeling. First, it looks at relevant literature to understand how city structure, wind, and climate comfort are connected. According to the outcomes , it identifies main avenue in LDA-approved housing society of Lahore as case studies. These existing street layouts are modeled digitally and evaluated using Computational Fluid Dynamics (CFD) simulations in CFD software , Sim-scale. The simulations check air movement and the wind velocity distribution. Alternative urban geometric configurations are subsequently tested to examine their influence on wind movement and natural ventilation. The results are compared to find city layouts that allow for better airflow and natural ventilation in these urban areas. These findings are then combined with the literature review for wind-responsive bio-climatic urban design guidelines in hot, semi arid climates. The CFD simulations evaluate the spatial distribution of wind velocity and airflow patterns around the selected urban geometries. The simulation-supported guidelines could help create sustainable cities that are aligned with the environment and have better natural ventilation, and offer more thermal comfort to the people.