Examples of WALE in a sentence
This last test illustrates how the dynamic procedure combined with the WALE fails to correctly model the mean velocity.
The dynamic WALE constant converges to 0.55 a value closed to the one proposed by Nicoud and Ducros5.
This situation is different from what is observed for the dynamic Smagorinsky4 model; in this case the dynamic constant (0.182) in the core region is close to the classical model constant as shown in figure 8.The dynamic version of the WALE model leads to very high value of the constant near the wall and to a bad prediction of the mean velocity.
The dynamic WALE, the dynamic Smagorinsky and the WALE models are first tested on the homogeneous isotropic turbulent (HIT) experiment of Comte- Bellot and Corsin (CBC).
A dynamic version of the WALE model5 with a Shear and Vortex Sensor has been proposed.
This indicates that the SVS dynamic WALE model has greater potential than the dynamic Smagorinsky model4 for complex/high Reynolds configurations while leading to equivalent results in simple/moderate Reynolds situations.
In contrary to what is often done for the dynamic Smagorinsky4 model and recently for the WALE model9, the stabilisation is not performed over homogeneous di- rections but locally; it is then well adapted to complex geometries.
The dynamic WALE model does not improve the WALE5 model and its velocity profile is not better than the dynamic Smagorinsky4 model.
Figure 1 shows the evolution of the spectra predicted by the static WALE model5 and the dynamic WALE described in section 2.2 compared with the experiment.2The first spectrum corresponds to the initialisation at time t∗ = 42.
Finally, a cure to this problem is proposed and used to built an appropriate dynamic WALE model which proves accurate in the channel flow and promising in an industrial like configuration.