COMPUTING THERMODYNAMIC FUNCTIONS IN TWO-PHASE LIQUID-VAPOUR REGION USING SPLINE-APPROXIMATION

L.F. Gudаrenко, V.A. Zherebtsоv
VANT. Ser.: Mat. Mod. Fiz. Proc 1994. Вып.1. С. 3-7.

      Computing method for thermodynamic functions in two-phase liquid-vapour region using iterationless algorithms is presented. The calculations require thermodynamic function values specified at two-phase region boundaries and approximation of them by polynomial values- cubic and quadratic. The above method allows to compute thermodynamic function values together with their derivatives with respect to any of the following three pairs of variables: density - temperature, density - pressure, density-energy.