TY - JOUR A1 - Gutiérrez Montes, Cándido AU - Sanmiguel Rojas, Enrique AU - Burgos Olmos, Manuel Antonio AU - Viedma Robles, Antonio T1 - On the Fluid Dynamics of the Make-Up Inlet Air and the Prediction of Anomalous Fire Dynamics in a Large-Scale Facility Y1 - 2012 SN - 0379-7112 UR - http://hdl.handle.net/10317/4552 AB - The present paper is focused on the fluid dynamics of the make-up air at the vents in case of an atrium fire, its influence on the fire-induced conditions and the necessity of properly model it to obtain an accurate numerical prediction. For this aim, experimental data from two full-scale atrium fire tests conducted in a 20 m cubic facility, with venting conditions involving mechanical smoke exhaust and make-up air velocities larger than 1 m/s, and with different fire powers, are presented. Subsequent numerical simulations of these tests have been performed with the code Fire Dynamics Simulator v5.5.3. Two different approaches have been followed to simulate the make-up air inlet fluid dynamics, involving one domain which only considers the inside of the building and another which includes part of the outside. In the former simulations, anomalous phenomena around the fire appear, while the inclusion of the exterior domain provides with a completely different fluid dynamics inside the facility which agrees better with the experimental data. A detailed analysis of the fluid mechanics at the air inlet vents is conducted to explain these discrepancies. Finally, further simulations are performed varying the make-up area to assess the appearance of the aforementioned phenomenon. KW - Mecánica de Fluidos KW - Make-up air KW - Mechanical exhaust KW - CFD simulations KW - Atrium KW - Full-scale firetests LA - eng PB - Elsevier ER -