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Wind Chill Factor

Wind Chill Factor. Regie Hyppolite and Justin Hyatt. Wind Chill. Introduction.

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Wind Chill Factor

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  1. Wind Chill Factor Regie Hyppolite and Justin Hyatt

  2. Wind Chill

  3. Introduction • We would like to show scientific support for the wind chill factor used by meteorologists. We will do this by conducting an experiment with forced convection and creating a derivation of the wind chill factor relationship.

  4. Heat Transfer Experiment • We heated a flat plate with a specified wattage and passed air over it in a wind tunnel until the surface temperature of the plate became constant. We recorded the steady-state surface temperature at multiple wind speeds. • We compared these measured values to calculated theoretical values.

  5. Equations Used for Calculations • 1st Step – Determine Nature of Flow. Is it Laminar or Turbulent? • 2. • 3. • 4. • All Fluid Properties were taken at film temperature.

  6. Experiment Results

  7. Results Discussion • The calculated results follow a similar trend as the measured data. The difference is within experimental error. • How does this model relate to Wind Chill Factor? • Scientists disagree on how to calculate the effect of wind on a human’s perception of temperature. • Some assume a constant flux and calculate the changed surface temperature, others find the equivalent air temperature that would create the same flux in free convection, Some use empirical data. • It is difficult to create a universal model as many factors affect perceived temperature including air and surface moisture and the shape and area of the surface.

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