Influence of Flow Disturbances behind the 90° Bend on the Indications of the Ultrasonic Flow Meter with Clamp-On Sensors on Pipelines

. 2021 Jan 28;21(3):868. doi: 10.3390/s21030868

List of Symbols
$D$	nominal diameter of the pipeline
$R$	bending radius of 90° bend
$R e$	Reynolds number
$R e_{M A X}$	maximum Reynolds number $q_{v}$ —volume stream
$q_{v M A X}$	maximum volume stream
$v$	flow velocity
$v_{M A X}$	maximum flow velocity
$v_{a v g}$	average flow velocity