CPD PROGRAMME | COMPUTATIONAL FLUID DYNAMICS k kinetic energy often referred to as the turbulent frequency, the rate at which turbulence kinetic energy is converted into thermal internal energy per unit volume and time6 2 7 4 5 3 8 4 Figure 1: Upward and downward outlet motorised blade positions (Source: Monodraught) 82 November 2021 www.cibsejournal.com CIBSE Nov21 pp81-84 CPD 188 Supp.indd 82 22/10/2021 15:20