Nonlinear characteristics and corrections of near-field underwater explosion shock waves

The shock wave characteristics within the near-field are one of most challenging aspects understanding an underwater explosion. latest numerical and experimental techniques were utilized to investigate pressure distribution decay features after a disturbance. governing equations in simulation discretized with fifth-order weighted essentially non-oscillatory scheme space third-order Runge–Kutta time, multi-medium interactions defined resolved via modified ghost fluid method. test system consisted synchronized high-speed framing camera polyvinylidene fluoride (PVDF) sensors. Three identical spherical composition B charges examined under same conditions, raw data from processed edge detection circle fitting techniques. comparison showed that image data, PVDF signals, computation results highly consistent each other. Higher-order correction terms added peak model as nonlinear corrections based on further comprehensive insightful analysis verified results. corrected models not only fit but had better accuracy far-field condition well.