Abstract The present study shows by a linear hydrodynamic stability analysis that an unstable mixed-layer deep circulation can be generated in the dry convective well-mixed layer entrainment from top. newly identified instability arises under two competing processes induced top entrainment: destabilization generating thermal perturbations and damping mechanical mixing. former latter, respective...

Abstract Hydrodynamic noise is one of the three major sources submarines, which has a great impact on concealment submarines. Using finite element method, submarine modeled, and sound pressure distribution at various monitoring points under different diving angles studied. The results show that each point small when angle about 10°, provides certain reference for submarine’s covert navigation.

The advent of detailed hydrodynamic model simulations urban flooding has not been matched by improved capabilities in flood exposure analysis which rely on validation against observed data. This work introduces a generic, building-level tool applying high resolution data and building geometries derived from performed with the 2D modelling software CityCAT. Validation were obtained survey affect...

In the procedure of designing an underwater vehicle or robot, its maneuverability and controllability must be simulated and tested, before the product is finalized for manufacturing. Since the hydrodynamic forces and moments highly affect the dynamic and maneuverability of the system, they must be estimated with a reasonable accuracy. In this study, hydrodynamic coefficients of an autonomous un...