johnt@hammer.TEK.COM (John Theus) (12/19/86)
I am looking for either a formula or table that will give me a wind chill temperature from wind velocity, actual temperature, and possibly humidity. If you have either, emailing it my way would be appreciated. John Theus Tektronix, Inc. johnt@hammer.TEK.COM
dko@calmasd.CALMA.UUCP (Dan O'Neill) (12/21/86)
In article <2712@hammer.TEK.COM> johnt@hammer.TEK.COM (John Theus) writes: >I am looking for either a formula or table that will give me a wind chill >temperature from wind velocity, actual temperature, and possibly humidity. >John Theus >Tektronix, Inc. >johnt@hammer.TEK.COM Here's the explaination and formulas from Mark's Standard Handbook for Mechanical Engineers (Yea!): -------------------- cut here -------------------- Wind-Chill Index The wind-chill index attempts to describe how much heat the body will lose under certain conditions of wind and temperature. It is determined empirically by an equation which is used to describe the rate of heat loss from a litre cylinder of water at 33C (91.4F) as a function of ambient temperature and wind velocity. However, it is more useful and has become common practice to use the "equivalent wind-chill temperature." The formulas for the wind-chill index (WCI) are WCI = (10.45-V+10*sqrt(V)) * (33C -ta) kcal/m^2/h where V = meters per second, ta = degrees C The more useful equivalent wind-chill temperature is expressed as teq = -0.144 * (WCI) + 33C teq = -0.88 * (WCI) + 91.4F teq = equivalent temperature -------------------- cut here -------------------- The Mark's handbook also has the tables if you care to look at them. -- Dan O'Neill uucp: {ihnp4|seismo|ucbvax}!sdcsvax!calmasd!dko (619) 587-3112 arpa: "calmasd!dko"@ucsd.arpa "Say, isn't that one of those new two-way diodes?" - db