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Volumetric Flow Rate Equation:
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Volumetric flow rate (Q) is the volume of fluid that passes through a given cross-sectional area per unit time. For air flow, it represents the amount of air moving through a duct, pipe, or opening in cubic meters per second.
The calculator uses the volumetric flow rate equation:
Where:
Explanation: The equation calculates how much volume of air passes through a given area when moving at a specific velocity over one second.
Details: Accurate air flow rate calculation is essential for HVAC system design, ventilation requirements, industrial processes, aerodynamics, and environmental engineering applications.
Tips: Enter cross-sectional area in square meters and velocity in meters per second. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between volumetric and mass flow rate?
A: Volumetric flow rate measures volume per time (m³/s), while mass flow rate measures mass per time (kg/s). They are related by density: mass flow = volumetric flow × density.
Q2: How do I measure air velocity accurately?
A: Use anemometers for direct measurement, or calculate from pressure differentials using Bernoulli's principle in duct systems.
Q3: What are typical air flow rates in ventilation systems?
A: Residential systems typically range from 0.1-0.5 m³/s, while commercial systems can handle 1-10 m³/s depending on building size and occupancy.
Q4: Does temperature affect air flow rate calculations?
A: Temperature affects air density, which impacts mass flow rate but not volumetric flow rate in this basic calculation. For precise engineering, temperature corrections may be needed.
Q5: Can this formula be used for liquids as well?
A: Yes, the Q = A × v formula applies to all incompressible fluids, including water and other liquids, assuming constant density.