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SW_Viscosity    Dynamic viscosity of seawater

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USAGE:  mu = SW_Viscosity(T,S)

DESCRIPTION:
   Dynamic viscosity of seawater at atmospheric pressure (0.1 MPa) using 
   Eq. (22) given in [1] which best fit the data of [2], [3] and [4]. 
   The pure water viscosity equation is a best fit to the data of [5]. 
   Values at temperature higher than the normal boiling temperature 
   are calculated at the saturation pressure.

INPUT:  (all must have same dimensions)
   T = temperature [degree C] (ITS-90)
   S = salinity    [g/kg] (reference-composition salinity)

OUTPUT:
   mu = dynamic viscosity  [kg/m s]

VALIDITY: 0 < T < 180 C and 0 < S < 150 g/kg;
 
ACCURACY: 1.5
 
REFERENCES:
   [1] Sharqawy M. H., Lienhard J. H., and Zubair, S. M., Desalination and Water Treatment, 2010
   [2] B. M. Fabuss, A. Korosi, and D. F. Othmer, J., Chem. Eng. Data 14(2), 192, 1969.
   [3] J. D. Isdale, C. M. Spence, and J. S. Tudhope, Desalination, 10(4), 319 - 328, 1972
   [4] F. J. Millero, The Sea, Vol. 5, 3 ?80, John Wiley, New York, 1974
   [5] IAPWS release on the viscosity of ordinary water substance 2008
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