For rivers flowing from the roof of the world, the flow of the water itself--not its warmth--determines which creatures can survive. A new study of the Yarlung Tsangpo Basin on the Qinghai-Xizang Plateau reveals that hydrodynamic intensity, measured as specific stream power, is the primary driver of macroinvertebrate biodiversity and community assembly in these high-altitude alpine rivers. The fi…
Given viscosity and density for the medium, volume and (subsonic) speed for the body and skin friction coefficient of the interface, is there a shape with provably lowest drag? The title says 'incompressible', because i am mostly interested in water - water is not incompressible, but sometimes usefully approximated as such. If my question is better answered for compressible media (i.e. all of the…
The effect of different types of projecting walls attached to a pile-restrained U-shaped Oscillating Water Column (U-OWC) integrated with Π-breakwater on its hydrodynamic performance is analysed using Boundary Element Method (BEM). Three different types of projecting walls, such as (i) straight, (ii) inclined, and (iii) curved projecting walls are investigated. The theoretical maximum efficiency,…
In its first year of operation, the Intelligent Towing Tank (ITT) conducted about 100,000 total experiments, essentially completing the equivalent of a PhD student’s five years’ worth of experiments in a matter of weeks. The automated experimental facility, developed in the MIT Sea Grant Hydrodynamics Laboratory, automatically and adaptively performs, analyzes, and designs experiments exploring […
