20.500.12556/DiRROS-21074 Predicting the total wall time of CFD simulations of single-compartment fires The total wall time is often difficult to predict a priori in compartment fire simulations due to dynamic phenomena that can occur, e.g., flame extinction. The wall time is dependent on multiple physical factors in the simulation, along with simulation factors and the system used to compute the model. Specifically, the CFL number of a simulation is highly influential to the wall time, as this restricts the time step size. In this paper, the prediction of the total wall time for a single-compartment fire is investigated considering varying fire heat release rates and compartment ventilation factors. It is shown that an increasing heat release rate increases the total wall time due to higher velocities inside the compartment. Furthermore, when the compartment becomes under-ventilated, the wall time becomes more difficult to predict early on in the simulation, as steady state conditions are reached later, compared to well-ventilated cases. The time at which the wall time can be accurately predicted changed from a few physical seconds in the well-ventilated case, to up to 60 physical seconds for the under-ventilated case. simulations computational fluid dynamics fire dynamics simulator wall time simulacije računalniška dinamika tekočin simulator požarne dinamike stenski čas true false true Institute of Physics Publishing Angleški jezik Slovenski jezik © authors, 2024 Neznano 2024-12-19 07:43:40 2024-12-19 07:49:33 2024-12-20 03:39:02 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 13. 12. 2024; Št. prispevka: 012100; Str. 1-6 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-11-01 53 1742-6596 10.1088/1742-6596/2885/1/012100 219028227 219018755 https://iopscience.iop.org/article/10.1088/1742-6596/2885/1/012100/pdf 1 96c317f4-bdd4-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29858 RAZ_Veit_Martin_2024.pdf RAZ_Veit_Martin_2024.pdf 1 3ED3CCD6506D89A52FD0DC8C162843A2 8185670ed55a562aa0d32dc7c7c64c9864508f58384adf87a04f1b3999e29e2d 62db0789-bdd5-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29859 Zavod za gradbeništvo Slovenije 0 0 0