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what is the working principle of vortex flowmeter
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Answer Posted / ramesh
The operating principle of the vortex meter is based on the
fact that when a flow hits an obstruction (bluff body), it
separates and moves around the object to continue on down
stream. Vortex swirls separate from the object on
alternating sides at the contacting point with the object.
This shedding causes low pressure swirls on one side and
high pressure on the other side. The process is reversed
from one side to another and keeps on alternating. The two
swirl frequencies are 180 degrees out of phase to each
other. And the frequency of this shedding process is
proportional to the velocity of the flow.
By measuring the frequency of formation of the vortex on any
side of the bluff body, the flow rate can be obtained. The
fluid velocity is proportional to the vortex frequency and
the width of the bluff body.
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