The unsteady flow around a ship advancing at a constant speed was studied in time domain by using a higher-order boundary element method. The Rankine source was employed. The ship hull and free surface were discretize...The unsteady flow around a ship advancing at a constant speed was studied in time domain by using a higher-order boundary element method. The Rankine source was employed. The ship hull and free surface were discretized into 8-node isoparametric elements. A modified Green formula was used to overcome the numerical difficulty arising from singular or quasi-singular integral equation. In the case of τ>0.25, a rigid wall condition was applied to the upstream and a numerical beach was applied to the downstream to absorb the outgoing waves. The numerical results are satisfactory compared with the experimental results.展开更多
基金the National Natural Science Foundation of China and the Chinese State Edu-cation Commission Grant.
文摘The unsteady flow around a ship advancing at a constant speed was studied in time domain by using a higher-order boundary element method. The Rankine source was employed. The ship hull and free surface were discretized into 8-node isoparametric elements. A modified Green formula was used to overcome the numerical difficulty arising from singular or quasi-singular integral equation. In the case of τ>0.25, a rigid wall condition was applied to the upstream and a numerical beach was applied to the downstream to absorb the outgoing waves. The numerical results are satisfactory compared with the experimental results.
