This article is cited in 13 papers

Gases and Fluids

Thermocapillary convection in a target irradiated by an intense charged particle beam

N. B. Volkov^a, A. Ya. Leyvi^ab, K. A. Talala^b, A. P. Yalovetz<sup>ab

a</sup> Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg
^b South Ural State University, Chelyabinsk

Abstract: A mathematical model is proposed for the heat-and-mass transfer in a target irradiated by an intense charged particle beam. It includes mechanics of continua equations and a kinetic equation for fast particles that are closed by a wide-range equation of state. A method for solving the model equations, which is based on the division of motion into vortex and potential flows, is proposed, and a numerical experiment is performed. Thermocapillary convection is shown to be the main mechanism of liquid-phase mixing in the target. Convective mixing is found to be effected when the pulse duration is much shorter than the characteristic thermal diffusivity time. Thermocapillary convection is shown to provide mixing on scales of 1–20 $\mu$m depending on the irradiation conditions.

Received: 30.07.2008
Accepted: 23.06.2009

 English version: Technical Physics, 2010, 55:4, 484–490

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