A new study from the Health and Safety Laboratory (HSL) provides guidelines, recommendations and best practices for the practical application of computational fluid dynamics to the modeling of smoke movement in enclosed spaces. HSL modeled three realistic fire safety engineering cases: a subway station, an accommodation module on an offshore platform, and a high-rise building under construction. Aspects of the modeling process — including the computational grid, the discretization scheme and the turbulence model — were varied for each scenario, and the resulting predictions of smoke transport were compared.