quinones_cisneros_2006
======================

S\. E\. Quiñones\-Cisneros and U\. K\. Deiters, "Generalization of the Friction Theory for Viscosity Modeling", J\. Phys\. Chem\. B 110, 12820 \(2006\)

`Source record <https://github.com/LupoLab/optmat/blob/main/src/optmat/data/sources/quinones_cisneros_2006.toml>`__ · :doc:`Catalogue </the-data/sources>` · :doc:`Review register </register>`

DOI: `10\.1021/jp0618577 <https://doi.org/10.1021/jp0618577>`__

**Source kind:** fit

**Recorded technique:** The friction theory of viscosity extended to any equation of state, with models for the light alkanes, HFC\-134a, carbon dioxide and water\. The dilute\-gas term is an empirical function of the reduced temperature, regressed against low\-pressure viscosity data together with a linear friction term for the initial\-density contribution \(section 4\.1\)\.

**Materials in structured entries:** CH4

**Dataset quantities:** None recorded.

**Contents:** 0 datasets; 1 formula.

Curation notes
--------------

Identity VALIDATED by the library\. Printed pp\. 12820\-12834; p\. = pdf page \+ 12819\.

THE DILUTE\-GAS VISCOSITY \(section 4\.1, Eq\. 24 and Table 1, p\. 12824\)\: eta0 = d0 \+ d1 Tr^0\.25 \+ d2 Tr^0\.5 \+ d3 Tr^0\.75, in mPa s, Tr = T/T\_c; methane d0 = 0\.00260536, d1 = \-0\.0185247, d2 = 0\.0234216, d3 = 0\. The paper does not print methane's T\_c; CoolProp uses 190\.564 K, Setzmann and Wagner's \(setzmann\_1991\)\.

RANGE AND UNCERTAINTY \(Table 1\)\: for methane the regression covers 95\-600 K with an absolute average deviation of 0\.31 %\. No uncertainty is stated\. optmat takes 95\-600 K\.

REPRODUCED\: CoolProp 8\.0\.0's methane viscosity \(reference key QuinonesCisneros\-JPCB\-2006\) at 1e\-6 mol/m^3 equals Eq\. \(24\) with T\_c = 190\.564 K to 1\.1e\-10, 120\-500 K \(computed 2026\-09\-30\)\.

**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\_2006/eq24\_CH4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eq24_CH4",
     "material": "CH4",
     "equation": "Eq. (24) and Table 1, p. 12824",
     "printed": "eta0 = d0 + d1 Tr^0.25 + d2 Tr^0.5 + d3 Tr^0.75",
     "variable": "Tr = T/T_c, T_c = 190.564 K (not printed; the equation of state's); eta0 in mPa s",
     "range": "95-600 K (Table 1)",
     "coefficients": {
       "d0": "0.00260536",
       "d1": "-0.0185247",
       "d2": "0.0234216",
       "d3": "0",
       "critical_temperature": "190.564"
     },
     "check": "CoolProp 8.0.0 equals it to 1.1e-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 :doc:`review register </register>` for the checks and decisions.