An effective method for modeling the load of bubble jet in underwater explosion near the wall

Abstract

Due to the nonlinear effects such as strong impact and complex movement of gas-water interface in the process of water jet in underwater explosion, there is no suitable method to calculate the load of water. This work presents a novel and efficient method for modeling underwater-explosion-induced bubble jet near the wall. In this method, compressible multiphase five-equation model with interface compression and density correction is solved by a finite volume method, while a fifth-order accuracy Weighted Essentially Non-Oscillation (WENO) reconstruction and HLLC approximate Riemann solver are employed to discretize the convective terms, and 3rd order TVD Runge-Kutta scheme is used to discretize the temporal term. This method is validated by conducting one-dimensional benchmarking problems and two-dimensional cases. It is found that the results predicted by our method agree well with those from different sources. Finally, the proposed method is applied to simulate underwater explosion bubble jet near the wall. It shows that the generation, development and collapse of the water jet can be well captured, confirming that the five-equation model is effective for modeling bubble jet load near the wall.