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Garden Hose Flow Equation:
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The Garden Hose Flow Equation (Q = A × v) calculates the volumetric flow rate of water through a hose by multiplying the cross-sectional area of the hose by the velocity of the water flow. This fundamental fluid dynamics equation provides an estimate of how much water is delivered per unit time.
The calculator uses the flow equation:
Where:
Explanation: The equation demonstrates that flow rate is directly proportional to both the cross-sectional area of the hose and the velocity of the water flowing through it.
Details: Calculating flow rate is essential for proper irrigation planning, water usage management, selecting appropriate hose sizes, and ensuring efficient water delivery for gardening and landscaping needs.
Tips: Enter the cross-sectional area in square meters and flow velocity in meters per second. Both values must be positive numbers. For circular hoses, area can be calculated using π × (diameter/2)².
Q1: How do I measure hose diameter accurately?
A: Use calipers or a measuring tape to measure the internal diameter of the hose. For most garden hoses, standard sizes are 1/2 inch, 5/8 inch, or 3/4 inch.
Q2: What is a typical flow velocity for garden hoses?
A: Typical flow velocities range from 0.5-2.5 m/s depending on water pressure, hose length, and diameter. Higher pressures result in higher velocities.
Q3: How does hose length affect flow rate?
A: Longer hoses create more friction, reducing flow velocity and consequently decreasing the overall flow rate for the same water pressure.
Q4: Can I use this for other fluids besides water?
A: The equation works for any Newtonian fluid, but viscosity differences may affect actual flow rates compared to water.
Q5: How accurate is this calculation for real-world applications?
A: This provides a theoretical maximum. Actual flow rates may be lower due to friction losses, bends in the hose, and pressure variations.