This paper analyzes the influence of the piston effect in the longitudinal ventilation system of
subway tunnels using numerical methodologies. This aerodynamic effect, highly complex …

In order to ensure the safety and comfort of passengers and staff, an underground railway
requires an extensive ventilation and cooling system. One mechanism for underground …

The air flows induced by train movement in tunnels can be used for the purposes of
underground railway ventilation. The magnitude of such air flows depends strongly upon the …

Big cities attract thousands of persons every day. Persons may meet at the same place and
time with high density. This situation is likely to initiate series fires that may begin to lead …

در مطالعه حاضر، با شبیه‌سازی بر پایه ی روش های دینامیک سیالات محاسباتی و داده های تجربی
پژوهش‌های پیشین، مدل عددی سه بعدی تونل‌های متروی مجهز به کانال‌های تهویه‌ی طبیعی مورد بررسی …‎

The purpose of this study was to investigate methods of enhancing the piston effect in
underground railways for the improvement of thermal conditions on platforms. In many …