sw.viscosity {oce}R Documentation

Seawater viscosity

Description

Compute viscosity of seawater, in Pa*s

Usage

v <- sw.viscosity(ctd)
v <- sw.viscosity(S, t=NULL)

Arguments

ctd an object of class "ctd".
S salinity [PSU]
t in-situ temperature [degC]

Details

In the first form, the argument is a ctd object, from which the salinity, temperature and pressure values are extracted and used to for the calculation.

Derived from a curve fit to table 87 of Dorsey (1940). The fit matches the table to within 0.2 percent at worst, and with average absolute error of 0.07 percent. The maximum deviation from the table is one unit in the last decimal place.

No pressure dependence was reported by Dorsey (1940).

Value

Viscosity of seawater in Pa*s. Divide by density to get kinematic viscosity in m^2/s.

Author(s)

Dan Kelley

References

N. Ernest Dorsey (1940), Properties of ordinary Water-substance, American Chemical Society Monograph Series. Reinhold Publishing.

Examples

 v <- sw.viscosity(30,10); # 0.001383779

[Package oce version 0.1.71 Index]