Numerical Simulation of Drop-Sizes

En’Urga Inc. developed a computer program to calculate drop size distribution of twin fluid atomizing sprays from first principles.  The program, which is based on Discrete Probability Functions, uses linear stability analysis to find the drop size distribution.   The effect of fluctuations in relative velocity between the air and liquid and the physical properties of the fluids on the drop size distributions is calculated.  A considerable effect of fluctuations in relative velocity on the width of the distribution was found.  Further information can be obtained in the following article.

Sovani, S. D., Sojka, P. E., and Sivathanu, Y. R., “Prediction of Drop Size Distributions from First Principles:  The Influence of Fluctuations in Relative Velocity and Liquid Physical Properties,” Atomization and Sprays, vol. 9, pp. 133-152 (1999).