This study evaluates the hydrodynamic and operability characteristics of a multipurpose high-speed craft derived from the CB90 through stern-region refinement. Calm-water performance was assessed using unsteady Reynolds-averaged Navier–Stokes simulations with volume-of-fluid free-surface capture in STAR-CCM+, while wave responses were analyzed with ANSYS AQWA for several speeds, wave headings, and sea states. The assessment co...

This study investigates the motion stability of a small unpowered catamaran subjected to ship waves in shallow waters. Ship waves generated by large vessels operating in coastal and confined waterways may pose safety risks to nearby small craft. Wave parameters derived from the free-surface results of 2000-ton and 6000-ton vessels simulated in STAR-CCM+ were used as inputs for time-domain motion analysis in ANSYS AQWA. The res...

This study examines the evolution characteristics of ship waves generated by large vessels in shallow waters. A CFD-based numerical wave tank, incorporating Torsvik’s ship wave theory, was developed using the VOF multiphase approach and the RNG k-ε turbulence model to capture free-surface evolution and turbulence effects. Results indicate that wave heights vary significantly near the critical depth-based Froude number (Fh). Co...

Background Major depressive disorder is a leading cause of disability worldwide, affecting up to 17 % of the general population. The neural mechanisms of depression, however, are yet to be uncovered. Recently, attention has been drawn to the effects of dysfunctional brain-gut axis on depression, and many substances have been suggested to be involved in the communication between the gut and brain, such as ghrelin. Methods We he...