Thermophysical Properties: Rubidium
From Thermal-FluidsPedia
Rubidium, Rb, Molecular Mass: 85.5, (Tsat = 959.2 K; Tm = 312.7 K) T Temp. K pv saturation pressure (105 Pa) hlv latent heat (kJ/kg) ρℓ liquid density (kg/m³) ρv vapor density ( kg/m³) μℓ liquid viscosity (10-4 N-s/m²) μv vapor viscosity (10-4 N-s/m²) kℓ liquid thermal conductivity (W/m-K) kv vapor thermal conductivity (W/m-K) σ liquid surface tension (10-3N/m) cp,ℓ liquid specific heat (kJ/kg-K) cp,v vapor specific heat (kJ/kg-K) 500 0.0001733 889.6 1386 0.0003585 3.23 29.8 81.6 0.369 0.3353 600 0.003664 870.9 1340 0.006386 2.58 0.112 27.8 0.0073 75.7 0.362 0.4100 700 0.03174 849.7 1294 0.04819 2.18 0.135 25.9 0.0089 69.8 0.357 0.4679 800 0.1584 827.3 1248 0.2145 1.89 0.158 24.1 0.0103 63.9 0.353 0.4979 900 0.5476 804.6 1202 0.6726 1.69 0.183 22.2 0.0115 58.0 0.353 0.5035 1000 1.467 782.2 1156 1.658 1.53 0.208 20.3 0.0125 51.3 0.360 0.4937 1100 3.295 759.6 1110 3.437 1.40 0.244 18.5 0.0133 44.5 0.373 0.4762 1200 6.466 737.0 1064 6.274 1.30 0.268 16.7 0.0141 37.7 0.385 0.4558 1300 11.43 714.5 1018 10.36 1.21 0.289 15.0 0.0149 30.9 0.399 0.4354 1400 18.6 694.0 972 12.35 1.14 0.314 13.6 0.0156 26.0 0.408 0.4130 1500 28.5 674.0 926 22.22 1.08 0.336 12.0 0.0160 19.0 0.418 0.3900
Propertya Temp. α0 α1 α2 α3 α4 α5 Error(%) pv (105Pa) 500–1500 K -55.657 1.8743-1b -2.7675-4 2.2191-7 -9.2037-11 1.5478-14 0.57 hlv (kJ/kg) 500–1500 K 6.7318 6.7485-4 -1.7798-6 1.7134-9 -8.4612-13 1.6787-16 0.02 ρℓ (kg/m³) 500–1500 K 7.3881 -2.8698-4 -3.4371-8 -1.5849-11 3.9560-15 -2.0966-18 0.01 ρv (kg/m³) 500–1500 K -66.172 2.5978-1 -4.5141-4 4.1965-7 -1.9911-10 3.7782-14 3.00 μℓ (10-4Ns/m²) 500–1500 K 4.0558 -1.0855-2 1.4889-5 -1.1567-8 4.6581-12 -7.5589-16 0.12 μv (10-4 Ns/m²) 600–1500 K -9.8418 3.6490-2 -7.1293-5 7.1688-8 -3.5422-11 6.8223-15 0.56 kℓ (W/m-K) 500–1500 K 4.7043 -6.4659-3 1.3165-5 -1.4204-8 7.2430-12 -1.4313-15 0.17 kv (W/m-K) 600–1500 K -6.6733 1.4823-3 8.4641-6 -1.5050-8 9.5117-12 -2.1186-15 0.08 σ (10-3N/m) 500–1500 K 7.9250 -1.9554-2 4.3014-5 -4.7024-8 2.4631-11 -5.0586-15 0.73 cp,ℓ (kJ/kg-K) 500–1500 K -2.3892 8.5914-3 -1.9597-5 2.0443-8 -9.8727-12 1.8050-15 0.21 cp,v (kJ/kg-K) 500–1500 K -3.3670 6.0154-3 -5.4747-7 -7.5127-9 6.2261-12 -1.5185-15 0.15
Polynomial function: ln(Property) = α0 + α1T + α2T2 + α3T3 + α4T4 + α5T5
References
Faghri, A., and Zhang, Y., 2006, Transport Phenomena in Multiphase Systems, Elsevier, Burlington, MA.
Faghri Amir , Zhang Yuwen , Howell John, 2010, Advanced Heat and Mass Transfer, Global Digital Press, Columbia, MO
Vargaftik, N.B., 1975, Handbook of Physical Properties of Liquids and Gases, Hemisphere, New York, NY.