Formation of liquid cone jet dependent on rise time of driving voltage |
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| Institution: | 1. Department of Physics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran;2. Faculty of Physics, Shahrood University of Technology, Shahrood 3619995161, Iran;1. Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;2. Department of Earth Sciences and Graduate School of Creative Science and Engineering, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan;3. PTT Group Science and Technology Institute Project, 555 Vibhavadi Rangsit Road, Chatuchak, Bangkok 10900, Thailand |
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| Abstract: | This paper reports on transient dynamics of electrospray driven by high step voltage and its dependence on voltage rise time. Three rise times (50 ns, 1.8 μs, and 400 μs) were used to compare influence on liquid dynamics. It was found that, when the applied voltage exceeds a certain level, minute differences in voltage rise time significantly affect jet formation time. A rise time of 50 ns accelerates the jet ejection by about 20% compared with other rise times. These results indicate that optimization of rise time may enable drastic improvement of controllability of drop-on-demand electrospray. |
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| Keywords: | Electrospray EHD spray Laser shadowgraph Drop-on-demand process |
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