Soyuz was part of a space program.
Turbulence modeling is the construction and use of a model to predict the effects of turbulence .. model. mathematical model. turbulence. turbulence. A turbulent fluid flow has features on many different length scales , which all interact with each other .. A common approach is to average the governing equations of the flow , in order to focus on large-scale and non-fluctuating features of the flow .. However , the effects of the small scales and fluctuating parts must be modelled .