OGS

A latent heat model of vaporisation of water considering the critical temperature.
The model uses an equation for a general expression of the latent heat of vaporisation of water in the vicinity of and far away from the critical temperature, which was presented by Torquato and Stell in [38].
Denoting the critical temperature as \(T_c\), and introducing a dimensionless variable \(\tau=(T_cT)/T_c\) associated with temperature \(T\), the equation is given by
\[ L(\tau) = a_1 \tau^{\beta}+a_2 \tau^{\beta+\Delta} +a_4 \tau^{1\alpha+\beta} +\sum_{n=1}^{M}(b_n \tau^n),\,\text{[kJ/kg]}, \]
where the parameters of \(b_n\) are obtained by the least square method by fitting the equation with the experiment data.
In this model, the parameter set of \(M=5\) is taken for a high accuracy. All parameters are given below:
The critical temperature is 373.92 \(^{\circ}\)C.
A comparison of this model with the model of MaterialPropertyLib::LinearWaterVapourLatentHeat is given in the following figure.
Used in no endtoend test cases.