An Improved Direct Forcing Immersed Boundary Method for Simulating Floating Objects
Please login to view abstract download link
In this paper, an enhancement for a direct forcing immersed boundary method is proposed. The open-source CFD code REEF3D::CFD (Bihs et al. 2016) is used for numerical calculations. To calculate rigid-body motion, a continuous direct forcing method is available in REEF3D (Martin et al. 2021). The main intention of the proposed method is to decrease the blurriness of the fluid-solid interface and increase the accuracy of the tangential velocity calculations in the vicinity of the solid body. On this premise, the paper starts with demonstrating the weakness of the original formulations of Direct-Forcing IBM in REEF3D::CFD by simulating a benchmark problem. The proposed method is then tested with the same problem and is validated for different benchmark problems. The numerical results are compared with experimental results, and the performance of the new method is presented.
