Involving velocity, pressure, density and temperature as functions of space and time. Fluid Mechanics - The study of fluids - liquids and gases.Air Psychrometrics - Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content.Ρ ref = density reference at elevation 0 ft and temperature 70 oF - (0.075 lb m/ft 3)į = correction factor from the chart above Example - Density at Elevation 4000 ft and Temperature 300 oFįrom the chart above - at elevation 4000 ft and temperature 300 oF the correction factor is approximate 1.7.
Ρ = density at the given temperature and elevation (lb m/ft 3) The density at a given temperature and elevation can then be calculated as The chart above can be used to estimate " temperature vs. The specific volume of standard air at a certain altitude can be calculated by multiplying with the volume correction factor below Note! - other definitions of STP and NTP are widely used.
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