Calculate Wind Speed at 88masl with Coefficient 0.3

Thread starter Alan_m_t
Start date Nov 18, 2007
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Speed Wind

In summary, wind speed at a specific height can be calculated using the power law formula, with a coefficient typically ranging from 0.1-0.3 for open terrain. A higher coefficient (closer to 0.3) indicates a rougher surface, resulting in a slower wind speed. Other factors such as topography, atmospheric stability, and land use can also affect wind speed and may require adjustments to the coefficient. The power law formula is a simplified method for estimating wind speed and may not account for all complexities, but it can provide a general approximation. Wind speed typically increases with height, but this increase is not linear and can vary depending on terrain and atmospheric conditions.

Nov 18, 2007

Alan_m_t

If the wind speed is 5m/s at 10masl. How can i calculate the wind speed at 88masl with a surface roughness coefficient of 0.3?

Cheers

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Nov 18, 2007

LURCH

Science Advisor

What is "masl"?

Nov 18, 2007

Alan_m_t

Meters above sea level.

Related to Calculate Wind Speed at 88masl with Coefficient 0.3

1. How is wind speed calculated at 88 meters above sea level with a coefficient of 0.3?

The wind speed at a specific height can be calculated using the power law formula: V2 = V1(H2/H1)^α, where V1 is the wind speed at a reference height (typically 10 meters), H1 is the reference height, H2 is the desired height, and α is the coefficient, typically ranging from 0.1-0.3 for open terrain.

2. What is the significance of using a coefficient of 0.3 in wind speed calculations?

The coefficient, α, represents the roughness of the terrain and is used to account for the effects of surface roughness on wind speed. A higher coefficient (closer to 0.3) indicates a rougher surface, which will result in a slower wind speed at a given height.

3. Are there other factors that can affect wind speed at a specific height?

Yes, in addition to surface roughness, other factors such as topography, atmospheric stability, and land use can also impact wind speed at a specific height. These factors may require adjustments to the coefficient used in the calculation.

4. Can wind speed be accurately predicted using this formula?

The power law formula is a simplified method for estimating wind speed and may not account for all the complexities of wind flow. It is best used as a general approximation and may require adjustments for more accurate predictions.

5. How does wind speed at 88 meters above sea level compare to wind speed at ground level?

Wind speed typically increases with height due to reduced surface roughness and decreased drag. However, this increase is not linear and can vary depending on terrain and atmospheric conditions. Using the power law formula can provide a rough estimate of wind speed at a specific height, but it is important to consider other factors as well.