Study of Thermochemical and Transport Properties of Biodiesel from Azadirachta indica

This study proposes an investigation of the thermochemical and transport properties of biodiesel from Azadirachta indica (neem biodiesel). These properties are important in the CFD modeling process of hydrocarbon combustion. Two groups of properties are taken into account: on the one hand, the primary properties such as critical pressure, critical volume, critical temperature, boiling temperature, and normal melting point; on the other hand, secondary properties such as vapor pressure, liquid viscosity, latent heat of vaporization, liquid mass density, and surface tension. The group contribution model takes into account second-order groups used for the predictive proposition of primary properties. The secondary properties are generated by matrix programming of the available data. The primary properties thus determined are used as a digital database. After setting the boundary conditions, matrix writings are developed in the MATLAB code. The rendering obtained is exported in the form of a characteristic point gradient at the dependent parameter studied. The values obtained are as follows: 12.27 bar, 1111.39 cm³/mol, 752.72 bar, 587.35 K, and 334.70 K representing, respectively, the critical pressure, the critical volume, the critical temperature, the boiling temperature, and the normal melting point.