quinones_cisneros_2012

S. E. Quiñones-Cisneros, M. L. Huber and U. K. Deiters, “Correlation for the Viscosity of Sulfur Hexafluoride (SF6) from the Triple Point to 1000 K and Pressures to 50 MPa”, J. Phys. Chem. Ref. Data 41, 023102 (2012)

Source record · Catalogue · Review register

DOI: 10.1063/1.3702441

Source kind: fit

Recorded technique: A reference correlation of the viscosity of sulfur hexafluoride: an empirical dilute-gas term fitted to the primary low-pressure data, and the generalized friction theory on Guder and Wagner’s equation of state for the dense fluid.

Materials in structured entries: SF6

Dataset quantities: None recorded.

Contents: 0 datasets; 1 formula.

Curation notes

Identity VALIDATED by the library. Pages cited are pdf pages (the NIST reprint includes a publisher’s cover).

THE DILUTE GAS (pdf p. 5, Eq. 6 and Table 2): eta0 = d0 + d1 Tr^(1/4) + d2 Tr^(1/2) + d3 Tr^(3/4) + d4 Tr, in mPa s, Tr = T/T_c with T_c = 318.7232 K, Guder and Wagner’s; d = 0.118561, -0.378103, 0.416428, -0.165295, 0.0245381. Fitted to the primary data of 270-700 K (Kestin et al., Hoogland et al., Strehlow and Vogel, Hurly et al., Berg, Wilhelm et al.), ‘extrapolated with reasonable confidence from the triple point, 223.555 K, up to 1000 K’. optmat takes 223.555-1000 K.

UNCERTAINTY (pdf p. 9): ‘the dilute-gas model is estimated to have an uncertainty of 0.3% (at a coverage factor of two) for the temperature range 298 K to 700 K, rising to 1.5% at both the lowest (the triple point) and highest (1000 K) values’.

REPRODUCED: CoolProp 8.0.0’s viscosity (reference key QuinonesCisneros-JPCRD-2012) at 1e-6 mol/m^3 equals Eq. (6) to 1.4e-10, 230-1000 K (computed 2026-09-30). The paper’s check values at zero density (Table 3: 15.2887 uPa s at 300 K, 19.6796 at 400 K) lie 3.9e-5 and 3.2e-5 above Eq. (6) with the printed coefficients, presumably their unrounded ones; far below the stated uncertainty.

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets

No datasets are recorded.

Formulas

quinones_cisneros_2012/eq6

{
  "id": "eq6",
  "material": "SF6",
  "equation": "Eq. (6) and Table 2, pdf p. 5",
  "printed": "eta0 = d0 + d1 Tr^(1/4) + d2 Tr^(1/2) + d3 Tr^(3/4) + d4 Tr",
  "variable": "Tr = T/T_c, T_c = 318.7232 K; eta0 in mPa s",
  "range": "223.555-1000 K",
  "coefficients": {
    "d0": "0.118561",
    "d1": "-0.378103",
    "d2": "0.416428",
    "d3": "-0.165295",
    "d4": "0.0245381",
    "critical_temperature": "318.7232"
  },
  "check": "CoolProp 8.0.0 equals it to 1.4e-10 (tests/test_transport.py)."
}

Corrections

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.