Saturation Density: VDNSExpansion

VDNS Expansion: For d_sat of the Liquid or Gas phase

d_sat = d_c + a₁ × t^0.35 + åa_i+1 × tⁱ ; where the summation is from i = 1 to nTerms -1.

d_c = the critical density and t = 1 - T/T_c, where T_c is the critical temperature.

annotated evaluation results showing constant parameter T_c and fitted parameters (top to bottom): d_c, a_1, a_2, a_3, a_4

NOTE: The TDE program truncates this equation based upon the extent and quality of the fitted data.