bɪkˈʌz dˌiːˌɛnˈɛs sˌɪmjʊlˈeɪʃənz ɑːɹ ɛɡzˈoːɹbɪtəntli ɛkspˈɛnsɪv dˈuː tə mˈɛmɚɹi, kˌɑːmpjuːtˈeɪʃənəl ænd stˈoːɹɪdʒ ˌoʊvɚhˈɛdz, tˈɜːbjʊləns mˈɑːdəlz ɑːɹ jˈuːzd tə sˈɪmjʊlˌeɪt ðɪ ɪfˈɛkts ʌv tˈɜːbjʊləns.
Because DNS simulations are exorbitantly expensive due to memory, computational and storage overheads, turbulence models are used to simulate the effects of turbulence.