How much of an impact does a change in the shape of the throttling element used with a differential pressure flow meter have?
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I would like to ask regarding the throttling elements of differential pressure flow transmitters, such as orifice plates, V-cones, venturi tubes, Anemometers, wedge-shaped elements, target elements, etc. If viscous substances in the fluid adhere to these throttling elements, does that mean the shape of the throttling element changes? And what extent of impact would this have? Which throttle element is least affected?
The ratio of the material thickness to the orifice diameter; the smaller this value, the less affected it will be. In a Venturi tube, this value is likely to be the smallest. It can measure pipes with a diameter of 1 mm, as well as those with a diameter of 1 meter or 10 meters; even rivers 500 meters wide can be measured — there’s no more useful throttling element than the venturi. It’s a shame, though, that some foolish people don’t know what’s good and what’s not. .
Viscous substances have a significant impact on differential pressure flow meters.
Check your design manual for this; some errors (uncertainties) can be estimated, while others cannot.