Abstract
The spreading of a n-decane liquid film induced by the impingement of a spray generated by a high-pressure injector is studied experimentally. The experimental setup uses the Refractive Index Matching (RIM) method to observe the development and propagation of the wall film. The influence of injection time, injection pressure, temperature, and injector to wall distance are considered. The film evolution on the wall presents two clear distinct phases. During the injection phase the film area is growing linearly with respect to time. Once the injection is stopped, the film relaxes to its maximal expansion. Each phase is accurately described using a simple modeling based on mass and momentum balance in the liquid film.
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