Direct Numerical Simulation and Large Eddy Simulation on a Turbulent Wall-Bounded Flow Using Lattice Boltzmann Method and Multiple GPUs

Figure 11

The profile of Reynolds stress in the normal 𝑦-direction using LBM-LES at 𝐶_𝑠=0.13 for a local grid refinement system: 𝛿/4 top and bottom parts adjacent to walls were refined to 512×15×127 (Δ⁺=2.82) and the middle parts are kept at 256×48×64 (Δ⁺=5.64).