Investigation Of Air Flow Around Buildings Using Computational Fluid Dynamics Technique

Engineering projects are now demanding design solutions that are beyond standard practise. To meet this challenge the utilization of sophisticated numerical modeling techniques, such as CFD (Computational Fluid Dynamics) being able to provide innovative engineering design solutions.  CFD techniques have been applied in predicting wind flow conditions : around a single building, between two parallel  buildings ,  and around multiple building configuration. I would like show some results obtained in numerical solutions using CFD techniques. These results summarized from some literature.

A. Validation of the Computational Fluid Dynamics (CFD) Method for Predicting Wind  Flow Around a High-Rise Building (HRB) in an Urban Boundary Layer Condition Condition. (By Abdul Razak Sapian)

This study attempts to validate and justify the realibility of  Flovent by investigating the  wind flow around a high rise building.  The main goal of this paper is to determine if the  CFD method can be be used to study wind flow around a high-rise building. The data obtained from the simulation are compared with wind tunnel data.

The size of building was 78 m x 10 m x 50 m. The building was placed inside an overall   domain solution size of 318 m x 450m x 240 m high.The position of the building inside the overall   domain solution was 120 m from x-plane, 250 m from z-plane, and 0 m from y-plane.

Results of simulation :

 

Conclusion from this paper :

The results obtained from the simulation show a deviation of less than 15% compared   with   wind tunnel results.   

Shelvam (1992) allowed up to a 7% deviation for the average windward point between his CFD calculation and the  experimental data.

In a separate case study, another CFD expert, Shao (1992), accepts a 20% tolerance for a good agreement  between his CFD Codes’ Cp results and the experiment data.