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Numerical study of evaporation characteristics of biodiesel droplets of Indian origin

机译：印度起源生物柴油液滴蒸发特征的数值研究

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摘要

This paper presents comprehensive numerical simulations of evaporation of biodiesel droplets of Indian origin in air at atmospheric pressure under normal gravity conditions. A transient, two-phase and axisymmetric numerical model has been used for the simulations. Transport processes in liquid- and vapor-phases are solved along with interface coupling conditions. The influence of suspension bead on the droplet size and internal motion has also been considered in the model. Variable thermo-physical properties in both liquid- and vapor-phases, calculated as functions of temperature and species concentrations, are considered. Weber number has been chosen in a range where the droplet remains almost spherical throughout its lifetime. Evaporation characteristics of droplets of biodiesels such as methyl esters of karanja, jatropha, palma and mahua have been compared against the experimental data from literature. Two approaches are used: in the first, biodiesel is considered as a single-component fuel, which is a mixture of its fatty acid components. In the second approach, all the individual fatty acid components are separately considered and evaporation of a multi-component droplet has been simulated. Predicted flow, temperature and species fields in and around the droplet surface have been presented. A correlation based on long chain saturation factor is proposed.
机译：本文在正常重力条件下，在大气压力下，在空气中蒸发的综合数值模拟印度血液的蒸发。瞬态，两相和轴对称数值模型用于模拟。液体和蒸气相中的运输过程与界面耦合条件一起解决。在模型中也考虑了悬浮珠对液滴尺寸和内部运动的影响。考虑了作为温度和物种浓度的函数计算的液体和气相相中的可变热物理性质。韦伯号已被选中在液滴在整个寿命过程中几乎留下的范围内。将蒸发生物柴油液滴的蒸发特性，例如Karanja，麻风树，帕尔马和玛瓦的甲基酯进行比较来自文献的实验数据。使用两种方法：在第一，生物柴油被认为是单组分燃料，其是其脂肪酸组分的混合物。在第二种方法中，所有单独的脂肪酸组分分别考虑并模拟了多组分液滴的蒸发。已经提出了预测的流动，温度和液滴表面和周围的物种场。提出了基于长链饱和因子的相关性。

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