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Volumetric Flow Equation:
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The volumetric flow equation Q = A × v calculates the volume of air passing through a cross-sectional area per unit time. This fundamental principle is widely used in HVAC systems, ventilation design, and anemometer measurements to determine air flow rates in various applications.
The calculator uses the volumetric flow equation:
Where:
Explanation: The equation multiplies the cross-sectional area through which air flows by the average velocity of the air to determine the volume of air moving per second.
Details: Accurate air flow measurement is essential for proper ventilation system design, energy efficiency calculations, indoor air quality assessment, and industrial process control. It ensures adequate air exchange rates and optimal system performance.
Tips: Enter cross-sectional area in square meters (m²) and air velocity in meters per second (m/s). Ensure both values are positive numbers for accurate calculation. Common applications include duct sizing, fan selection, and ventilation rate determination.
Q1: What units should I use for area and velocity?
A: Use square meters (m²) for area and meters per second (m/s) for velocity to get flow rate in cubic meters per second (m³/s).
Q2: How do I measure air velocity accurately?
A: Use an anemometer at multiple points across the cross-section and calculate the average velocity for most accurate results.
Q3: Can this formula be used for liquids?
A: Yes, the Q = A × v formula applies to both gases and liquids for incompressible flow conditions.
Q4: What if the cross-section is not circular?
A: The formula works for any shape - simply calculate the actual cross-sectional area perpendicular to the flow direction.
Q5: How does temperature affect air flow calculations?
A: Temperature affects air density, which influences mass flow rate but not volumetric flow rate in this basic calculation.