Computes the density of water
as a function of pressure and temperature,
using various empirical correlations ([Chaplin, 2000+]).
This page is essentially a template for 3-D plots
via 'gnuplot' command splot.
The 'expansion coefficient', β,
needed in the computation, is given by (empirical)
β = -6.31543e-08 t² + 1.436466e-5 t
- 8.7013237e-5 (°C−1), admitted valid
in -10 to 100 °C. These coefficients were simply computed
(here.xlsx)
through the analysis of the Excel 'trendline'. (To this end,
in the case of the European 'locale' setting, see the critical
detail in [Excel, European locale].)
The given 'bulk modulus', E, corresponds to (fixed)
t = 20 °C ([TETB]).
[For the particular point (p0, t0) =
(100 bar, 20 °C), this reference gives 1002.7 kg/m3,
but here interpolations from [Chaplin, 2000] were used.]
Plots ρ (kg/m3) versus p (bar)
and t (°C). |
