ɹˈɛnəldzstɹˈɛs mˈɑːdəlz ˌɑːɹɹˌɛsˈɛm jˈuːs ɐ dˈɪfɹənt mˈɛθəd tə klˈoʊz ðə ɹˈɛnəldz stɹˈɛsᵻz, wˈɛɹbaɪ ðə nˈoːɹməl stɹˈɛsᵻz ɑːɹ nˌɑːt ɐsˈuːmd ˌaɪsətɹˈɑːpɪk, sˌoʊ ðɪ ˈɪʃuː wɪð tˌiːkˌeɪˈiː pɹədˈʌkʃən ɪz ɐvˈɔɪdᵻd.
Reynolds-stress models (RSM) use a different method to close the Reynolds stresses, whereby the normal stresses are not assumed isotropic, so the issue with TKE production is avoided.