ɪn kˌɑːmpjuːtˈeɪʃənəl flˈuːɪd daɪnˈæmɪks sˌiːˌɛfdˈiː, ɪɾ ɪz ɪmpˈɑːsᵻbəl tə nuːmˈɛɹɪkli sˈɪmjʊlˌeɪt tˈɜːbjʊləns wɪðˌaʊt dɪskɹˈɛɾaɪzɪŋ ðə flˈoʊfˈiːld æz fˈɑːɹ æz ðə kˈɑːlməɡˌoːɹɑːv mˈaɪkɹoʊskˌeɪlz, wˌɪtʃ ɪz kˈɔːld dᵻɹˈɛkt nuːmˈɛɹɪkəl sˌɪmjʊlˈeɪʃən dˌiːˌɛnˈɛs.
In computational fluid dynamics (CFD), it is impossible to numerically simulate turbulence without discretizing the flow-field as far as the Kolmogorov microscales, which is called direct numerical simulation (DNS).