3-D simulations of sneezing, coughing help motivate social distancing
Not convinced yet that keeping your distance and wearing a mask is worth the trouble? Perhaps scientific evidence to the contrary will help.
May 14, 2020
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6
Computer Sciences
Not convinced yet that keeping your distance and wearing a mask is worth the trouble? Perhaps scientific evidence to the contrary will help.
May 14, 2020
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6
Engineering
Anyone who looks to the stars also dreams of going to space. Turning this dream into reality depends on countless technological advances. One of these is new rocket and aircraft engines, which are becoming easier and cheaper ...
Feb 7, 2020
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Energy & Green Tech
Offshore wind power generation has become an increasingly promising source of renewable energy. Much about the aerodynamic effects of larger wind farms, however, remains poorly understood. New work in this week's Journal ...
Dec 12, 2019
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Hi Tech & Innovation
The Bloodhound, the darling of The Bloodhound LSR jet car project, has good reason to be praised as a speed rockstar, with speed now at 461mph (741km/h).
Energy & Green Tech
Diesel engines are widely used in transport the world over. Regulatory and legal efforts are afoot to reduce their use in some countries because of concerns about pollution. However, they are likely to remain a mainstay of ...
Jul 30, 2019
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3
Engineering
UC Santa Barbara mechanical engineer Paolo Luzzatto-Fegiz was frustrated. Once again, the delicate tip of the instrument he was using to measure water density—a conductivity probe—had broken, rendering the setup useless ...
Aug 8, 2017
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49
Energy & Green Tech
A new study has revealed how inspiration from owls' wings could allow aircraft and wind turbines to become quieter.
Jul 4, 2017
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80
In physics, fluid dynamics is a sub-discipline of fluid mechanics that deals with fluid flow—the natural science of fluids (liquids and gases) in motion. It has several subdisciplines itself, including aerodynamics (the study of air and other gases in motion) and hydrodynamics (the study of liquids in motion). Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns, understanding nebulae in interstellar space and reportedly modeling fission weapon detonation. Some of its principles are even used in traffic engineering, where traffic is treated as a continuous fluid.
Fluid dynamics offers a systematic structure that underlies these practical disciplines, that embraces empirical and semi-empirical laws derived from flow measurement and used to solve practical problems. The solution to a fluid dynamics problem typically involves calculating various properties of the fluid, such as velocity, pressure, density, and temperature, as functions of space and time.
Historically, hydrodynamics meant something different than it does today. Before the twentieth century, hydrodynamics was synonymous with fluid dynamics. This is still reflected in names of some fluid dynamics topics, like magnetohydrodynamics and hydrodynamic stability—both also applicable in, as well as being applied to, gases.
This text uses material from Wikipedia, licensed under CC BY-SA