Computational Analysis of Choices in the Design of Smoke Extraction Duct Systems (SEDS) for Compartment Fires

Large Eddy Simulations (LES) of smoke extraction duct system (SEDS) in single compartments different volumes (i.e., 128 m $$^3$$ , 512 and 2400 ) with FDS 6.5.3 are presented. The required grid resolution for accurate flow inside the systems is discussed influence SEDS design parameters shape position system, number openings) on efficiency analysed. rates applied to determined a-priori based simplified calculations these estimates compared against predicted CFD results terms free heights compartments). Overall, numerical predictions satisfactory within less than 5 $$\%$$ errors) most scenarios considered, apart from compartments, where 20 lower expected. analysis simulation reveals some important aspects, including that use multiple openings not efficient, extraction, same compartment local velocities, at level openings, can potentially exceed maximum allowed values. Among parameters, rectangular or flat) as well opening(s) do have a significant heights.