Abstract
AbstractWhile various researchers have explored the effects of turbulence profile development on orifice plates, the literature is not clear on how magnetic flowmeters respond to increased levels of local turbulence. Accordingly, this study investigated the effects of local turbulence and velocity profiles on magnetic flowmeter accuracy. Using five magnetic flowmeters from five different manufacturers, laboratory tests were conducted with a flow conditioner located at different distances upstream of the meter. Numerical modeling using commercially available computational fluid dynamics (CFD) software showed local turbulence levels in the pipe to be four times greater at one diameter downstream of a flow conditioner than the local turbulence levels without a flow conditioner installed. Furthermore, the CFD showed that the deviations in flowmeter accuracy were not proportional to the levels of local turbulence.
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