Hydrodynamics is the branch of continuum mechanics that studies the motion of incompressible or weakly compressible fluids and the forces associated with that motion. It is governed fundamentally by the Navier–Stokes equations, which express conservation of mass and momentum, often complemented by constitutive relations for viscosity and turbulence models. Hydrodynamics analyzes laminar and turbulent flow regimes, boundary layers, instabilities, and transport phenomena such as momentum and energy dissipation. It underpins quantitative descriptions of flow in pipes, channels, around immersed bodies, and in geophysical and astrophysical contexts, providing predictive frameworks for engineering design, environmental modeling, and many areas of physical sciences.
When an object hits a body of water vertically, it is accompanied by a strong hydrodynamic force fueled by the flow of water around it, which propels it forward. The magnitude of this force is known to vary depending on the ...
Researchers from University of Tsukuba investigated the propulsion mechanism by visualizing water flow around a swimmer during underwater dolphin-kick swimming in a water channel via particle image velocimetry. Their findings ...
General Physics
Mar 12, 2024
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For decades scientists have been trying to solve Feynman's Sprinkler Problem: How does a sprinkler running in reverse—in which the water flows into the device rather than out of it—work? Through a series of experiments, ...
General Physics
Jan 29, 2024
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Today, water pressure technology is ubiquitous, and any person who showers, waters a garden, or fights fires is benefiting from the technology devised to harness it. In the 17th and 18th centuries, though, a steady stream ...
General Physics
Jan 23, 2024
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