NOVELTY - A computer-implemented method of modeling physical properties of fatty acid esters of glycerol in biodiesel feedstock comprises determining value of subject physical property of biodiesel feedstock using resulting computed values of physical property of different fatty acid esters of glycerol by expressing value of subject physical property of biodiesel feedstock as sum of values from resulting computed physical property values corresponding to fatty acid esters of glycerol of biodiesel feedstock.    USE - A computer-implemented method of modeling physical properties of fatty acid esters of glycerol in biodiesel feedstock.    ADVANTAGE - The method is efficient, accurate, and systematic correlation and estimation of the thermophysical properties of individual mono, di and triglyceride components and of the mixture properties of fats and oils in biodiesel feedstock.    DETAILED DESCRIPTION - A computer-implemented method of modeling physical properties of fatty acid esters of glycerol in biodiesel feedstock comprises:    (A) estimating values of a physical property of fatty acid fragments of a subject fatty acid ester of glycerol;    (B) computing a value of the physical property of the subject glycerol by expressing the value of the physical property of the subject glycerol as a sum of the estimated values of the physical property of fatty acid fragments of the subject glycerol;    (C) repeating steps (A) and (B) for different fatty acid esters of glycerol resulting in computed values of the physical property of different fatty acid esters of glycerol; and    (D) determining a value of a subject physical property of a biodiesel feedstock using the resulting computed values by expressing the value of the subject physical property of the biodiesel feedstock as a sum of values from the resulting computed physical property values corresponding to fatty acid esters of glycerol of the biodiesel feedstock where the determined value of the subject physical property enables blending of the biodiesel feedstock in production of biodiesel.    INDEPENDENT CLAIMS are included for:    (1) a data store formed from the computer-implemented method of modeling physical properties of fatty acid esters of glycerol in biodiesel feedstock; and    (2) a biodiesel production modeling system.    DESCRIPTION OF DRAWING(S) - The drawing is a graph showing a comparison of predicted vapor pressure of simple saturated triglycerides where heavy-black lines are predictions with the fragment method, light-black lines are predicted with the group contribution method, and lines with the same legend corresponds to the same triglycerides.