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# Propane - Prandtl Number vs. 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 c p / k                           (1)

where
μ = absolute or dynamic viscosity [kg/(m s)], [lb m /(ft h)]
c p = specific heat [J/(kg K)], [Btu/(lb m o F)]
k = thermal conductivity [W/(m K)], [Btu/(h ft 2 o F/ft)]

Below, Prandtl numbers of propane at varying temperatures and saturation pressure, as well as 1, 10 and 100 bara (14.5, 145 and 1450 psia) are given in figures and tables .

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

Prandtl number of propane at atmospheric pressure, varying temperature given as °C or °F:

Prandtl number of propane at 1, 10 and 100 bara (14.5, 145 and 1450 psia), varying temperature given as °C or °F:

Prandtl number of propane at atmospheric pressure, temperature given as K, °C or °F:

 State Temperature Prandtl number Temperature Prandtl number [K] [°C] [-] [K] [°F] [-] Liquid 123 -150 13.7 116 -250 17.0 148 -125 7.59 144 -200 8.15 173 -100 5.32 172 -150 5.39 198 -75 4.20 200 -100 4.15 223 -50 3.57 228 -50 3.48 231 -42 3.43 231 -44 3.43 Gas 231 -42 0.784 231 -44 0.784 248 -25 0.770 244 -20 0.773 263 -10 0.761 255 0 0.766 268 -5 0.759 266 20 0.760 273 0 0.757 272 30 0.757 278 5 0.755 278 40 0.755 283 10 0.753 283 50 0.753 293 20 0.751 294 70 0.750 298 25 0.750 300 80 0.749 303 30 0.749 305 90 0.748 323 50 0.746 311 100 0.747 348 75 0.745 339 150 0.745 373 100 0.744 366 200 0.744 398 125 0.744 394 250 0.744 423 150 0.743 422 300 0.743 448 175 0.740 478 400 0.736 473 200 0.737 533 500 0.723 523 250 0.726 589 600 0.706 573 300 0.711 644 700 0.686 623 350 0.694 700 800 0.665 673 400 0.675 755 900 0.644 773 500 0.637 811 1000 0.622

Prandtl number of propane at given temperatures and saturation pressure as well as 1, 10 and 100 bara (14.5, 145 and 1450 psia):

 State Temperature Pressure Prandtl number [K] [°C] [°F] [bara] [psia] [-] Liquid at equilibrium 100 -173 -280 2.5E-07 3.7E-06 35.37 130 -143 -226 0.000176 0.00255 11.19 160 -113 -172 0.00850 0.1233 6.270 190 -83.2 -118 0.1055 1.530 4.495 220 -53.2 -63.7 0.6058 8.787 3.643 250 -23.2 -9.7 2.180 31.62 3.179 280 6.9 44.3 5.817 84.37 2.920 310 36.9 98.3 12.73 184.6 2.790 320 46.9 116 15.99 231.9 2.770 340 66.9 152 24.32 352.7 2.848 355 81.9 179 32.43 470.4 3.259 360 86.9 188 35.55 515.6 3.548 Gas at equilibrium 100 -173 -280 2.5E-07 3.7E-06 1.154 130 -143 -226 0.000176 0.00255 0.9481 160 -113 -172 0.00850 0.1233 0.8499 190 -83.2 -118 0.1055 1.530 0.8002 220 -53.2 -63.7 0.6058 8.787 0.7840 250 -23.2 -9.7 2.180 31.62 0.7956 280 6.9 44.3 5.817 84.37 0.8357 310 36.9 98.3 12.73 184.6 0.9249 320 46.9 116 15.99 231.9 0.9789 340 66.9 152 24.32 352.7 1.188 355 81.9 179 32.43 470.4 1.732 360 86.9 188 35.55 515.6 2.300 Liquid 85.53 -187.62 -305.72 1 14.5 99.44 100 -173.15 -279.67 1 14.5 35.88 120 -153.15 -243.67 1 14.5 15.11 140 -133.15 -207.67 1 14.5 8.891 160 -113.15 -171.67 1 14.5 6.290 180 -93.15 -135.67 1 14.5 4.942 200 -73.15 -99.67 1 14.5 4.145 220 -53.15 -63.67 1 14.5 3.633 230.74 -42.41 -44.34 1 14.5 3.433 Gas 230.74 -42.41 -44.34 1 14.5 0.7857 240 -33.2 -27.67 1 14.5 0.7760 260 -13.2 8.33 1 14.5 0.7621 280 6.9 44.33 1 14.5 0.7534 300 26.9 80.33 1 14.5 0.7492 320 46.9 116 1 14.5 0.7467 340 66.9 152 1 14.5 0.7458 360 86.9 188 1 14.5 0.7453 400 127 260 1 14.5 0.7437 500 227 440 1 14.5 0.7301 600 327 620 1 14.5 0.7024 700 427 800 1 14.5 0.6658 800 527 980 1 14.5 0.6252 900 627 1160 1 14.5 0.5840 1000 727 1340 1 14.5 0.5434 Liquid 85.62 -187.53 -305.55 10 145 99.81 100 -173 -280 10 145 36.19 120 -153 -244 10 145 15.21 140 -133 -208 10 145 8.941 160 -113 -172 10 145 6.318 180 -93.2 -136 10 145 4.958 200 -73.2 -99.7 10 145 4.156 220 -53.2 -63.7 10 145 3.641 240 -33.2 -27.7 10 145 3.300 260 -13.2 8.3 10 145 3.064 280 6.9 44.3 10 145 2.909 300.09 26.94 80.49 10 145 2.811 Gas 300.09 26.94 80.49 10 145 0.8851 320 46.9 116 10 145 0.8299 340 66.9 152 10 145 0.8001 360 86.9 188 10 145 0.7824 400 127 260 10 145 0.7619 500 227 440 10 145 0.7321 600 327 620 10 145 0.6999 700 427 800 10 145 0.6626 800 527 980 10 145 0.6218 900 627 1160 10 145 0.5810 1000 727 1340 10 145 0.5407 Liquid 100 -173 -280 50 725 37.10 200 -73.2 -99.7 50 725 4.216 300 26.9 80.3 50 725 2.802 Supercritical phase 400 127 260 50 725 1.305 500 227 440 50 725 0.8190 Liquid 86.45 -187 -304 100 1450 103.18 100 -173 -280 100 1450 39.46 120 -153 -244 100 1450 16.28 140 -133 -208 100 1450 9.433 160 -113 -172 100 1450 6.596 180 -93.2 -136 100 1450 5.139 200 -73.2 -99.7 100 1450 4.282 220 -53.2 -63.7 100 1450 3.735 240 -33.2 -27.7 100 1450 3.367 260 -13.2 8.3 100 1450 3.112 280 6.9 44.3 100 1450 2.934 300 26.9 80.3 100 1450 2.798 320 46.9 116 100 1450 2.691 340 66.9 152 100 1450 2.597 360 86.9 188 100 1450 2.504 Supercritical phase 400 127 260 100 1450 2.282 500 227 440 100 1450 1.085 600 327 620 100 1450 0.8466 700 427 800 100 1450 0.7417 800 527 980 100 1450 0.6694 900 627 1160 100 1450 0.6098 1000 727 1340 100 1450 0.5586

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