A famous example is the blinking vortex flow introduced by Aref, where two fixed rod-like agitators are alternately rotated inside the fluid.
12.
A numerical model study have shown that, when a surface in a street canyons heats up, it changes the characteristics of the vortex flow.
13.
Whittle had assumed the use of vortex flow in the turbine blades however BTH engineers had not incorporated this and had manufactured the blades with insufficient twist.
14.
In a rigid-body vortex flow of a fluid with constant density, the dynamic pressure is proportional to the square of the distance from the axis.
15.
However, due to the complexity of the vortex flow this empirical approach was able to show only aspects of the effect but was unable to explain its operating principle.
16.
However, a positive displacement meter can be considerably heavier and more costly than non-positive-displacement types such as orifice plates, magnetic or vortex flow meters.
17.
Phase conjugate velocimeters have proved to correctly measure the flow velocity in the case of laminar flows in tubes, vortex flows under rotating disks and immersed jets in water.
18.
In an irrotational vortex flow with constant fluid density and cylindrical symmetry, the dynamic pressure varies as } }, where is the limiting pressure infinitely far from the axis.
19.
Vortex flow occurs at the trailing edge and, because the radius of the sharp trailing edge is zero, the speed of the air around the trailing edge should be infinitely fast.
20.
Pollution from local source inside the canyon and also pollution entrained in to the canyon from the mean wind flow, is carried by the vortex flow and is re-circulated within the canyon.
