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Fragmentation of a liquid metal jet into water

Abstract : This paper presents experimental results on the fragmentation of a low meting point liquid metallic alloy jet into water. The liquid is Field's metal whose melting point is 62 °C. Data are obtained using high-speed camera acquisition and the solidified particles are sieved, a size Probability Distribution Function (PDF) is obtained from their mass distribution. These results are compared to separate data acquisitions obtained using a phase Doppler anemometer (PDA used in reflexion regime). Injection diameter range from 1 mm to 5 mm and injection velocity from 2.28 m/s to 4.97 m/s resulting in a Weber number ranging from 26 to 309 and a Reynolds number ranging from 4577 to 24875. The conclusion is that for these intermediate Weber and Reynolds numbers, the size of the droplets can mainly be related to Kelvin-Helmholtz instabilities. However, there exists also a long tail of small sized droplet whose distribution can be attributed to turbulent re-agglomeration of ligaments. This part of the distribution is very close to a log-Lévy law thanks to a model developed by [Rimbert & Castanet, PhysRevE, 84, 016318, 2011] By estimating the different turbulent scales, it is even possible to construct the small size distribution of droplet without using any fitting parameter.
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https://hal.univ-lorraine.fr/hal-02444727
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Submitted on : Saturday, January 18, 2020 - 10:37:23 PM
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Nicolas Rimbert, Hadj-Achour Miloud, Michel Gradeck, Alexandre Labergue, Renaud Meignen. Fragmentation of a liquid metal jet into water. 29th European Conference on Liquid Atomization and Spray Systems, Sep 2019, Paris, France. ⟨hal-02444727⟩

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