LES and URANS Unsteady Boundary Layer Strategies for Pulsating and Oscillating Turbulent Channel Flows Applications

The use of wall functions has been investigated for LES and URANS numerical simulation in pulsating and oscillating channel flow applications. The results show that the wall function approach is accurate in the so-called quasi-steady regime but there are discrepancies with the experimental results in the intermediate frequency range. A special...

Numerical modeling of long-term oscillating flows in material processing operations

Long-term oscillating behaviour of turbulent recirculating flow fields are observed in many material processing operations even with steady-state boundary conditions. Such unsteady large scaled flow behaviour is of particular importance for process control and process performance. Hence, it is important to understand the underlying mechanisms in...