年間 12 号発行
ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684
Indexed in
NON-NEWTONIAN LEIDENFROST DROPS
要約
The impact of non-Newtonian drops (equilibrium diameter: ~3 mm) on a heated surface in the Leidenfrost regime is studied experimentally by high-speed imaging. Impact Weber numbers in the range of10 and 200 have been compared with the impact of water drops for the same conditions. Dilute solutions of polyethylene oxide in de-ionized water were used as model viscoelastic fluids, with a polymer mass concentration of 300 ppm; a xanthan gum solution was used as a model shear-thinning fluid (300 ppm weight concentration). Results show that polymer additives change the scaling of the maximum spreading diameter with respect to the Weber number, and increase the maximum bouncing height of drops. This suggests a different distribution of the initial impact kinetic energy with respect to drops of pure water.
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Chen Simeng, Bertola Volfango, The impact of viscoplastic drops on a heated surface in the Leidenfrost regime, Soft Matter, 12, 36, 2016. Crossref
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Chen Simeng, Bertola Volfango, Jumps, somersaults, and symmetry breaking in Leidenfrost drops, Physical Review E, 94, 2, 2016. Crossref
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Bertola Volfango, Brenn Günter, Transport Phenomena Across Interfaces of Complex Fluids: Drops and Sprays, in Transport Phenomena in Complex Fluids, 598, 2020. Crossref
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Santos Eileen, Waghmare Prashant R., Temelli Feral, Interfacial tension and equilibrium contact angle of corn oil on polished stainless steel in supercritical CO2 and N2, The Journal of Supercritical Fluids, 156, 2020. Crossref
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Dhar Purbarun, Mishra Soumya Ranjan, Gairola Ajay, Samanta Devranjan, Delayed Leidenfrost phenomenon during impact of elastic fluid droplets, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 476, 2243, 2020. Crossref