Modelling indoor pollutant distribution via passive scalar and virtual box approachGeorge Pitchurov, Detelin Markov, Iskra Simova, Rositsa Velichkova, Peter Stankov and Radostina AngelovaE3S Web Conf., 327 (2021) 05001DOI: https://doi.org/10.1051/e3sconf/202132705001