An algorithm for solution of a model for heating and evaporation of a fuel droplet has been developed. The objective of the work is to develop a computationally economic solution module for simulating droplet evaporation that can be incorporated in spray combustion CFD model that handles a large number of droplets. The liquid-phase transient diffusive equation has been solved semi-analytically, which involves a spatially closed-form and temporally discretized solution procedure. The model takes into account droplet surface regression, nonunity gas-phase Lewis number and variation of latent heat with temperature. The accuracy of the model is identical to a Finite Volume solution obtained on a very fine nonuniform grid, but the computational cost is significantly less, making this approach suitable for use in a spray combustion code. The evaporation of isolated heptane droplet in a quiescent ambient has been investigated for ambient pressures of 1 to 5 bar.
A Semi-Analytical Model for Evaporating Fuel Droplets
Manuscript received March 31, 2004; revision received August 11, 2004. Review conducted by: R. P. Roy.
Mukhopadhyay, A., and Sanyal , D. (March 15, 2005). "A Semi-Analytical Model for Evaporating Fuel Droplets ." ASME. J. Heat Transfer. February 2005; 127(2): 199–203. https://doi.org/10.1115/1.1842791
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