Ceiling beams at the top of tunnels are more common in actual projects. Under the influence of thermal buoyancy. the ceiling structure significantly affects the diffusion characteristics of fire smoke within the tunnel. This study investigated the influence of ceiling structural characteristics (beam height (hB) and beam spacing (dB)) on tunnel longitudinal ventilation through numeric... https://www.bekindtopets.com/mega-price-Fit-Flight-Air-Dart-Flights-Pear-Green-flash-find/