ɹˈɛnəldzˈævɹɪdʒd nˈeɪviɚ stˈoʊks ɹˈænz sˌɪmjʊlˈeɪʃənz jˈuːs ðə bˈaʊsaɪnəsk ˈɛdi vɪskˈɔsᵻɾi haɪpˈɑːθəsˌɪs tə kˈælkjʊlˌeɪt ðə ɹˈɛnəldz stɹˈɛs ðæt ɹɪzˈʌlts fɹʌmðɪ ˈævɹɪdʒɪŋ pɹəsˈiːdʒɚ:
Reynolds-averaged Navier–Stokes (RANS) simulations use the Boussinesq eddy viscosity hypothesis  to calculate the Reynolds stress that results from the averaging procedure: