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Carbon dioxide - Prandtl Number

Figures and table showing changes in Prandtl number for carbon dioxide with changes in temperature and pressure

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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 carbon dioxide at varying temperatures and pressures are given in figures and table.

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

Carbon dioxide Prandtl number at gas-liquid equilibrium pressure, temperature given as °C or °F:





Carbon dioxide Prandtl number at atmospheric pressure, temperature given as °C and °F:




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Carbon dioxide Prandtl number at varying temperatures at given constant pressures, SI and Imperial units:




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Carbon dioxide Prandtl number at given temperatures and 1, 10, 50 and 100 bara presure:

Temperature Prandtl number at given pressures
[K] [°C] [°F] 1 bara 10 bara 50 bara 100 bara
220 -53.2 2.5 0.792 2.70
233.03 -40.1 9.7 0.977
240 -33.2 13.6 0.785 0.942 2.32
250 -23.2 19.1 0.781 0.902 2.23 2.16
260 -13.2 24.7 0.777 0.873 2.10
280 6.9 35.8 0.770 0.833 2.06
287.43 14.3 39.9 2.74 (liq)
287.43 14.3 39.9 1.92 (g)
300 26.9 46.9 0.763 0.807 2.39
320 46.9 58.0 0.756 0.788 4.08
340 66.9 69.1 0.750 0.774 1.53
360 86.9 80.3 0.745 0.764 1.17
400 127 102 0.738 0.749 0.938
450 177 130 0.732 0.739 0.776 0.840
500 227 158 0.728 0.732 0.792
600 327 214 0.725 0.727 0.754
650 377 241 0.725 0.726 0.734 0.745
850 577 352 0.723 0.724 0.726 0.730
1050 777 464 0.721 0.721 0.723 0.724

Carbon dioxide phase diagram

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