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A Numerical Spray Impingement Model Coupled With A Free Surface Film Model.
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Vernon Cole and Sam Lowry CFD Research Corporation Deepak Mehra and Donald Gray West Virgina University
Abstract
A Lagrangian spray wall impingement model is integrated into the Eulerian free surface (Volume of Fluid) module of the multi-physics computational code, CFD-ACE+. The coupling of the two modules enables the modeling of spray impingement and splashing, including the effects of a fluid film on the wall. Results for both microscale and macroscale simulations are presented. The former uses the free surface volume of fluid model to resolve individual droplets with diameters in range of 50-100 microns and evaluate mass, momentum, and energy transfer from the spray droplets to the film as a function of droplet Weber number and dimensionless layer thickness. The macroscale simulations utilize the coupled spray and free surface modules to predict liquid film thickness and transport on the scale of millimeters to centimeters. The predicted results are compared with existing experimental and theoretical results.
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