Problem statement: The area under Phayathai station platform of sky train in Bangkok, Thailand, has a problem of air pollution control. Approach:The Bangkok Mass Transit System Company tries to set up the electric fans inside the area for air flow improvement. Results: The flow of the air is still not smooth and the air quality is still lower than standard. The assumption of the research that is the flow obstructs by the platform structures. Conclusion: In this research, a mathematical model

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... be simulating the causes of the flow obstacle. The numerical solution of the model is obtained by using a finite element technique.