How does a Parshall flume measure flow?

Parshall flume creates critical flow in the throat section. Flow rate Q = C·H_a^n where H_a is upstream head, C and n are flume-size constants from standard tables. Free flow: H_b/H_a < 0.5-0.7.

What size Parshall flume should I select?

Choose based on maximum flow rate and minimum flow detection. Throat width ranges from 25mm to 15m. Free flow submergence limit 50-70% depending on size. Standard throat widths simplify operation.

What is the advantage of cutthroat flumes?

Cutthroat flumes have no throat section, making them self-cleaning for sediment-laden flows. They can measure both free and submerged flow from a single upstream gauge.

Flume Design Calculator

Design Parshall, cutthroat, and trapezoidal flumes for flow measurement. Parshall flume Q = C·H_a^n. Throat width selection, free flow vs submerged conditions, and installation requirements.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Design Parshall, cutthroat, and trapezoidal flumes for flow measurement. Parshall flume Q = C·H_a^n. Throat width selection, free flow vs submerged conditions, and installation requirements. Use the flume design result to inform your clinical assessment.

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Frequently Asked Questions

How does a Parshall flume measure flow?

What size Parshall flume should I select?

What is the advantage of cutthroat flumes?