This is done by means of "a priori" tests, in which the input data for the model is taken from a DNS simulation, or by "a posteriori" tests, in which the results produced by the model are compared with those obtained by DNS.
Detta kan göras med "a priori"-tester, där indata till modellen tas från en DNS-simulering, eller med "a posteriori"-tester, där resultat från modellen jämförs med de som fås med DNS.