ðiːz spˌɛsɪfɪkˈeɪʃənz ɑːɹ ɹᵻflˈɛktᵻd ɪn kˌɑːmpjuːtˈeɪʃənəl flˈuːɪd daɪnˈæmɪks, wˈɛɹ "juːlˈɪɹiən" sˌɪmjʊlˈeɪʃənz ɛmplˈɔɪ ɐ fˈɪkst mˈɛʃ wˈaɪl "læɡɹˈæŋɡiən" wˈʌnz sˈʌtʃ ɐz mˈɛʃfɹiː sˌɪmjʊlˈeɪʃənz fˈiːtʃɚ sˌɪmjʊlˈeɪʃən nˈoʊdz ðæt mˈeɪ mˈuːv fˈɑːloʊɪŋ ðə vəlˈɑːsᵻɾi fˈiːld.
These specifications are reflected in computational fluid dynamics, where "Eulerian" simulations employ a fixed mesh while "Lagrangian" ones (such as meshfree simulations) feature simulation nodes that may move following the velocity field.