Detonation Shock Dynamics (DSD), involved in an underwater explosion scenario is numerically simulated by in-house computer code, ‘DSSDYN’. The simulation based on Chapman-Jouguet (CJ) theory, formulated Arbitrary Lagrangian Eulerian frame work. Specifically, the propagation of detonation front with‘Burn Fraction Model’. classical burn fraction model improved for achieving better computational ...

In naval warfare, underwater explosion (UNDEX) shock waves significantly influence the stability and safety of pressure hull structure equipment. This study investigated unique dynamic buckling a closed cylindrical shell subjected to far-field side-on UNDEX wave using three-dimensional numerical simulation based on acoustic–structural arithmetic. particular, flow-field response characteristics,...

Today, underwater acoustic communication is developing for its various applications. For signal transmission in underwater using ocean/ sea/lakes/rivers as a medium an appropriate underwater acoustic system is required. The significant characteristic of ocean makes the underwater communication difficult using electromagnetic waves. The characteristics of an acoustic signal make a good candidate...

ABSTRACT I analyse some properties of the luminous transient event SN 2019zrk and conclude that jets were main powering sources pre-explosion outburst (pre-cursor) ejection a massive circumstellar matter (CSM), very energetic explosion itself, post-explosion bump in light curve. The energy source is mainly companion (main sequence, Wolf–Rayet, neutron star, or black hole) star accreted mass lau...

The paper surveys recent advances in underwater vehicle navigation and identifies future research challenges. Improvements in underwater navigation sensor technology and underwater navigation algorithms are enabling novel underwater vehicles and novel underwater vehicle missions. This paper first reviews advances in underwater navigation sensor technology. Second, advances in deterministic and ...

In research studies, a student starts with writing a research proposal, followed up by intensive literature and industrial survey in his/her own research area. The student must perform his/her own research with validation under supervisor’s guidance. The student’s own research work must be differentiated from others work in order to demonstrate the unique originality and significance of the stu...