Typical spray plumes with and without self-charging. (a) The spray

Download scientific diagram | Typical spray plumes with and without self-charging. (a) The spray plume generated by a nozzle with 8 holes of radius R=2μ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$R=2 \,\upmu$$\end{document}m using demineralized water. Due to the small spacing between jets, the individual jets cannot be discriminated and appear as one single jet. The self-charging makes the spray plume flare out once the droplets have decelerated significantly. Because of a decrease in coalescence, spray droplets are significantly smaller with self-charging, reducing the maximum travelled distance of the spray plume. (b) The same spray now containing small amounts of salt. As there is no charging the spray plume remains narrow and travels a longer distance. Still, due to vortices and complex flow in the surrounding air the spray plume starts to diverge and mix as well. from publication: Self-charging of sprays | The charging of poorly conducting liquids due to flows is a well-known phenomenon, yet the precise charging mechanism is not fully understood. This is especially relevant for sprays, where the spray plume dynamics and maximum distance travelled of a spray dramatically changes | Fees and Charges, Liquids and Streams | ResearchGate, the professional network for scientists.

Plume geometry showing side view of the emitted RHT:CH-ME spray.

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C.J.M. RIJN, Senior Researcher, Professor, University of Amsterdam, Amsterdam, UVA, Department of Physics and Astronomy

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PDF) Self-charging of sprays