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Methane - Prandtl number vs. Temperature

Figures and table showing changes in Prandtl number for methane with changes in temperature and pressure.

The Prandtl Number - Pr - is a dimensionless number approximating the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity - and is often used in heat transfer and free and forced convection calculations.

The Prandtl number can for calculations be expressed as

Pr =  μ Cp / k                           (1)

where
μ = absolute or dynamic viscosity (kg/m s, lbm/(ft h))
Cp = specific heat (J/kg K, Btu/(lbmoF))
k = thermal conductivity (W/m K, Btu/(h ft2oF/ft))

Below, Prandtl numbers for methane at varying temperatures and pressures are given in figures and table.

See also other properties of Methane at varying temperature and pressure: Density and specific weight, Dynamic and kinematic viscosity, Specific heat (Heat capacity) and Thermal conductivity, and  as well as Prandtl number of Air, Ammonia, Nitrogen, Propane and Water.

Methane Prandtl number at atmospheric pressure, temperature given as °C or °F:

Methane Prandtl number at varying temperatures and constant pressures, SI and Imperial units:

Methane Prandtl number at given temperatures and 1, 10 and 100 bara presure:

 Temperature Prandtl number at given pressures [K] [°C] [°F] 1 bara,14.5 psia 10 bara,145 psia 100 bara,1450 psia 160 -113 -172 0.7721 0.8659 1.629 180 -93.2 -136 0.7583 0.8170 1.640 200 -73.2 -99.7 0.7487 0.7892 1.867 220 -53.2 -63.7 0.7420 0.7726 2.055 240 -33.2 -27.7 0.7369 0.7607 1.453 260 -13.2 8.3 0.7328 0.7515 1.148 280 6.9 44.3 0.7299 0.7452 1.007 300 26.9 80.3 0.7279 0.7402 0.9304 320 46.9 116 0.7261 0.7370 0.8824 340 66.9 152 0.7243 0.7341 0.8501 360 86.9 188 0.7234 0.7312 0.8269 400 127 260 0.7216 0.7276 0.7968 500 227 440 0.7182 0.7233 0.7560 600 327 620 0.7155 0.7179 0.7385 700 427 800 0.7127 800 527 980 0.7099 900 627 1160 0.7082 1000 727 1340 0.7060

Related Topics

• Fluid Mechanics - The study of fluids - liquids and gases. Involves velocity, pressure, density and temperature as functions of space and time
• Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more
• Thermodynamics - Effects of work, heat and energy on systems

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