Efficient Simulation of Viscous Flow by Means of Turbulence Regularization Modeling and Local Grid Refinement

In this paper, a number of methods are described that allow for more accurate and more efficient computation of viscous flow effects with the CFD tool COMFLOW. The intended application area is the offshore environment, where flows are characterized by Reynolds numbers of at least O(106). A symmetry-preserving regularization model will be used to model turbulence. In the near-wall region, an extension of the 2-D LSSTAG immersed boundary method is described and tested for Hagen-Poiseuille flow. To account for a turbulent boundary layer near solid boundaries, the effective wall-shear stress near boundaries is adjusted according to the Werner-Wengle model. In order to increase computational efficiency, a semi-structured local grid refinement method is implemented, which is tested for a number of flow cases. H.J.L. van der Heiden, P. van der Plas, A.E.P. Veldman, R. Luppes, R.W.C.P Verstappen