This is the amount of volume that will flow pass per unit of time. Cross-Sectional AreaĮnter the size of the area perpendicular to the direction of flow. Flow Velocity MeasuredĮnter the speed at which the substance is moving. This formula assumes uniform flow conditions within the entire cross-sectional area, without any friction losses near to surfaces. The volumetric flow rate formula used by this calculator is: For each new calculation a unique conversion scale will be generated for the range of flow velocities and volumetric flow rates with the cross sectional area specified. Air Flow formulas CFM Duct area sq ft x Velocity Standard Air 70F 29.92 HG (Mercury) 1 cubic foot of standard air 0.075 pounds 13. Mass flow rate, denoted as, is the mass of a substance flowing through a given cross-sectional area per unit of time.It is typically measured in kilograms per second (kg/s) or other mass units per time unit. It is popularly used for water flow, especially in rivers and streams, and fractions for HVAC. Before diving into the calculation of mass flow rate, let’s define some key terms and notation. This tool will calculate the volumetric flow rate in any units from the specified velocity of a substance flowing through a defined cross-sectional area. A cubic metre per second (m 3 ·s -1, m 3 /s or cubic meter per second in American English) is a derived SI unit of flow rate equal to that of a cube with sides one metre (100 centimetres or 39.37 inches) in length exchanged or moving each second. Calculate cross-sectional area of rectangular shaped duct.Calculate cross-sectional area of circular pipe or duct.Calculate flow velocity from a given volume flow rate and area. ![]() Calculate flow area from volume flow and flow speed.Related Toolsįind another flow measurement calculator by clicking on the required answer which coincides with the input parameters you already know. Sorry, a graphic could not be displayed here, because your browser does not support HTML5 Canvas.
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