Immersed boundary conditions for moving objects in turbulent flows with the lattice-Boltzmann method

Abstract

An immersed boundary method is coupled to a turbulent wall model and Large Eddy Simulation, within the Lattice-Boltzmann framework. The method is able to handle arbitrarily moving objects immersed in a high Reynolds number flow and to accurately capture the shear layer and near wall effects. We perform a thorough numerical study which validates the numerical method on a set of test-cases of increasing complexity, in order to demonstrate the application of this method to industrial conditions. The robustness and accuracy of the method are assessed first in a static laminar configuration, then in a mobile laminar case, and finally in a static and oscillating turbulent simulation. In all cases, the proposed method shows good results compared to the available data in the literature.

An Effective Arbitrary Lagrangian-Eulerian-Lattice Boltzmann Flux Solver Integrated with the Mode Superposition Method for Flutter Prediction

“…The density distribution of discrete particles evolves on simple rules of the collision and the subsequent streaming. Its simplicity and efficiency make it an attractive alternative to traditional CFD methods [28][29][30][31]. Cheylan et al [29] couple the LBM with the immersed boundary method for moving objects.…”

“…Its simplicity and efficiency make it an attractive alternative to traditional CFD methods [28][29][30][31]. Cheylan et al [29] couple the LBM with the immersed boundary method for moving objects. The shear layer and near-wall effects are both predicted in the high Reynolds number flow.…”