Models and prediction of turbulent flow with suspended particles. Report on the work done by Rouen University in 1984-85

The validity of the Stokes term contained in the Tchen equation and the overall validity of the Tchen equation are examined. Criteria are found to decide whether the Stokes contribution is sufficient to describe the main term of the movement of a particle in a turbulent flow. For the overall analysis it is noticed that some forces are not included in the Tchen equation and that the Arnason experimental results indicating the easier dispersion of larger particles should be explained. A Lagrangian approach is adopted and the Scope computer program was developed. Results show that an exponential Lagrangian correlation is not good enough. A correlation using Frenkiel functions is being explored.