| Abstract |
The merging of Reynolds-averaged Navier-Stokes (RANS) equations and large eddy simulation (LES) is a requirement to properly deal with many predictions of high Reynolds number (Re) complex wall-bounded turbulent flows usually seen in reality: there is no other way to reduce the huge LES cost for such flow predictions and to improve the reliability of RANS predictions. However, the RANS-LES hybridization turned out to be extremely challenging. Classical methods such as wall-modeled LES (WMLES) and detached eddy simulation (DES) are known to suffer from a variety of shortcomings. The origin of these problems is of conceptual nature: the idea that the technical combination of RANS and LES elements can overcome these problems. The talk introduces an alternative approach, referred to as continuous eddy simulation (CES). In contrast to WMLES, DES, and other hybrid RANS-LES, the core idea of CES is the implementation of a resolving (LES-type) capability in RANS equations based on exact mathematics. Three CES applications to high Re complex wall-bounded turbulent flows will be presented: periodic hill flow simulations, the NASA wall-mounted hump flow simulation, and the Bachalo & Johnson axisymmetric transonic bump flow simulation. These simulations reveal significant advantages of CES compared to RANS, LES, and usually applied hybrid RANS-LES. In particular, functionality, computational cost, and performance advantage of CES will be pointed out. |
, Adeyemi Fagbade 
