The arm through which fluid is pushed back towards the axis of movement must exert a force on the fluid to decrease the fluid's absolute angular speed (angular momentum) again, hence that arm leads the overall vibration.
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The arm carrying the flow away from the axis of rotation must exert a force on the fluid to accelerate the flowing mass to the vibrating speed of the tubes at the outside (increase of absolute angular momentum), so it is lagging behind the overall vibration. The animation on the right illustrates what happens during mass flow: some twisting of the tubes. When no fluid is flowing, the motion of the two tubes is symmetrical, as shown in the left animation. The amplitude of the vibration is too small to be seen, but it can be felt by touch. The actual frequency of the vibration depends on the size of the mass flow meter, and ranges from 80 to 1000 Hz. An actuator (not shown) induces equal counter vibrations on the sections parallel to the axis, to make the measuring device less sensitive to outside vibrations. The fluid is led through two parallel tubes.
![flow meter water cad flow meter water cad](https://www.icenta.co.uk/uploads/1/1/4/7/114709647/flowmax-54i_orig.png)
The animation on the right represents how curved tube mass flow meters are designed. The principle design of a curved tube mass flow meter. The fluid may also be a combination of phases such as a fluid with entrained bubbles.Īctual density can be determined due to dependency of sound velocity on the controlled liquid concentration. The density of the fluid may change with temperature, pressure, or composition, for example. If the fluid has varying density, then the relationship is not simple. If the density is constant, then the relationship is simple. Volumetric flow rate is the mass flow rate divided by the fluid density. The mass flow meter does not measure the volume per unit time (e.g., cubic meters per second) passing through the device it measures the mass per unit time (e.g., kilograms per second) flowing through the device. The mass flow rate is the mass of the fluid traveling past a fixed point per unit time.
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(July 2017) ( Learn how and when to remove this template message)Ī mass flow meter, also known as an inertial flow meter is a device that measures mass flow rate of a fluid traveling through a tube. Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. Your local Seametrics distributor can also help put together a custom measurement solution for you.This article needs additional citations for verification. Have questions about a particular product or application? We provide sales and technical support. Simply select your market and location to find a Seametrics distributor near you. In order to provide customers with speed and local support for our flow, level and water quality instrumentation, we’ve partnered with a trusted network of domestic and international distributors. Our focus on innovation, product value and customer accessibility has resulted in over two decades of continuous growth.
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