Prediction of Size of Iron Spherules Formed from Melted Micrometeoroids

• Autorzy: Polak Wiesław

Identyfikatory

DOI

10.12913/22998624/175312

• Języki publikacji: EN

Abstrakty

EN

Movement of liquid iron micrometeoroid in the Earth atmosphere is simulated to find the time-dependence of its acceleration, velocity and coordinates as well as the length of luminous trajectory when the micrometeoroid is still melted. In the simulations it is assumed that the maximum size of the stable droplet is determined by aerodynamic fragmentation of the moving droplet occurring when the Weber number exceeds its critical value. Two different initial altitudes h of droplet formation were analysed: 80 km and 50 km, both for a wide range of initial velocities between 6 and 20 km/s. Depending on their initial velocity, exceeding the Earth’s escape velocity equal 11.2 km/s, the maximum radius of solid spherules, emerging from solidified final droplet, is predicted here to lie between (a) 55 and 100 μm for h = 80 km, and (b) 10 and 30 μm for h = 50 km.

Słowa kluczowe

EN

liquid micrometeoroids; iron spherules; aerodynamic fragmentation; Weber number; droplet size

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2023
• Tom: Vol. 17, no 6
• Strony: 388--393
• Opis fizyczny: Bibliogr. 16 poz., fig.

Twórcy

autor

Polak Wiesław

• Department of Applied Physics, Faculty of Mechanical Engineering, Lublin University of Technology,

• https://orcid.org/0000-0001-7289-7062

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).