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Velocity At Desired Elevation Formula:
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The Velocity at Desired Elevation formula calculates wind speed at a specified height above ground level based on the known wind speed at 10 meters height. This is particularly useful in meteorology, wind energy, and structural engineering applications.
The calculator uses the velocity at desired elevation formula:
Where:
Explanation: The formula accounts for the wind speed profile variation with height, where wind speed typically increases with elevation due to reduced surface friction.
Details: Accurate wind speed estimation at different elevations is crucial for wind turbine placement, building design, air pollution dispersion studies, and various meteorological applications.
Tips: Enter wind speed at 10m height in m/s and desired elevation in meters. Both values must be positive numbers greater than zero.
Q1: Why does wind speed increase with height?
A: Wind speed increases with height due to reduced surface friction and turbulence effects. The ground surface creates drag that slows wind near the surface.
Q2: What is the exponent 0.11 based on?
A: The exponent 0.11 represents the wind profile power law coefficient, which varies depending on terrain roughness and atmospheric stability conditions.
Q3: How accurate is this formula?
A: The formula provides a reasonable estimate for neutral atmospheric conditions over relatively flat terrain. Accuracy may vary in complex terrain or under different stability conditions.
Q4: Can this formula be used for very high elevations?
A: The formula is generally applicable for elevations up to a few hundred meters. For higher elevations, more complex atmospheric models may be needed.
Q5: What are typical wind speed values at 10m height?
A: Typical wind speeds at 10m range from 2-10 m/s for most locations, though extreme conditions can produce much higher values during storms.