Gradiente de velocidade em medidor Parshall
Default

Input data

Flow (Q)

Temperature

Flume width (W)

Downstream height (Yj)

Output data

Velocity gradient

Head loss

Critical yj

Detention time

Description

Given the water temperature, the Parshall flume width, the flow through it, and the tailwater height, this calculation determines the velocity gradient in the stretch downstream from the throat.

Parshall

Inputs

ParameterDefault unitsDescription
Flow (Q)L/sVolumetric flow through the Parshall flume
Temperature°CWater temperature
Flume width (W)inWidth of the Parshall flume throat
Downstream height (Yj)mTailwater height at the downstream section of the Parshall flume

Outputs

ParameterDefault unitsDescription
Flow (Q)m³/sVolumetric flow through the Parshall flume
Velocity gradients⁻¹Velocity gradient in the downstream section
Head loss (hf)mHead loss along the analyzed section
Critical yjmCritical height of the liquid layer
Detention time (tdet)sWater detention time within the Parshall flume

References

  • VIANNA, Marcos Rocha. Produção, Reservação e Distribuição de Água. e-book. Belo Horizonte: Bloom, 2021.