'Airflow around Singapore' simulation project by Milad_Mafi


I created a new simulation project called 'Airflow around Singapore':

This project demonstrates how to simulate the airflow around a simplified model of a large city.

More of my public projects can be found here.




While simulation technology is already widely used in automotive, aerospace, and multiple other industries, its adoption in architecture and construction has been limited by a number of factors. The primary obstacles are the lack of affordable tools, as well as the specialized knowledge required to successfully use them.
Nonetheless, fluid flow simulation holds great promise for the AEC industry, giving architects and engineers the ability to predict and optimize the performance of buildings in the early stage of the design process. And with the recent efforts to democratize CFD technology, including the emergence of easy-to-use cloud-based platforms with flexible pricing systems, tapping into its full potential is no longer an impossible task.
To demonstrate this, engineers at SimScale have performed a Computational Fluid Dynamics (CFD) analysis to simulate the airflow around Singapore. With its high rise buildings and modern architecture, Singapore is suited to be an exemplary for other cities in the future. Therefore, this project would help us achieve a good apprehension of the factors to be considered and the parameters that could be controlled.

Project Goals

The project at hand strives to perform a CFD analysis of the airflow around the city of Singapore. The simulation results will help us determine the wind velocities around every building as well as the pressure difference created across their architecture.


A CAD model of an extract of Singapore is uploaded to SimScale in STEP format.


The mesh is generated using the Automatic, Hex-dominant mesh operation for external flow. The flow domain around the buildings is set to 8000x8000x1200m in order to minimize effects of the bounding walls. The resulting mesh consists of a little more than 3,000,000 cells.


The simulation is set up using the steady-state incompressible flow analysis type with a k-Omega-SST turbulence model. The airflow is simulated at 5m/s incoming wind velocity. The effect of the ground is neglected in this simple simulation setup.

Results and Conclusions

The results allow visualizing the wind velocities as well as the pressure field around every single building. Thereby the acting force onto the building can be computed.