Fluid mechanics is a branch of mechanics, is to study the fluid (including gas, liquid and plasma) phenomenon and related mechanical behavior of science. Hydrodynamics can be divided into hydrodynamics and hydrodynamics according to the movement of the subject. The former studies the fluid in a quiescent state, and the latter studies the effect on fluid motion. Fluid mechanics in accordance with the scope of application, divided into: air mechanics and hydraulics and so on.
Tornado in Water
Press the button on the right and observe the change of the water above when the shell below starts to spin in high speed. When a vortex appears, does it grow from the top down or does it develop from the bottom up? Press the button on the left, when the short-paddle propeller starts to push the water in high speed, observe the change on the water surface above. What will happen when you press the button for a second time? Why is there a large amount of air bubbles? In the two cylinders, what physical phenomenon is it when the vortex forms from the top down?
Secrets of Green Building
In Taiwan, there are more than six months a year when the weather is warm to people. Consequently, the demand of air-conditioning has used up a massive amount of energy. Let's think about how a building can conserve energy and reduce carbon emission in terms of air-conditioning. The Magic School of Green Technologies at National Cheng Kung University is the first "green building of zero carbon emission" in Taiwan. Let's explore the secrets of green architecture now! Adopting hydromechanics to simulate the convection of cool and hot air, in which hot air ascends while cool air descends, the design contains a low air inlet and a high air outlet. Hot air will go up and be let out due to the chimney effect, and consequently let in cool air from the openings of the building. Buoyancy-driven ventilation tower adopts the principle of buoyancy-driven ventilation to create an energy-conserving and airy environment.