Simulation of viscous melt drop crystallization by the SPH method

Abstract

Abstract. Heat and mass transfer during absorption on a film of lithium bromide water solution flowing by a cooled wall in the steam atmosphere is numerically investigated in this paper. The self-similar solutions are using as the initial conditions for solving the problem beyond the entrance region. The key criteria characterizing heat and mass transfer in the film absorption with uniform velocity profile and with a constant thickness have been determined. Problem statementNumerical simulation of gas-thermal spray coatings is a difficult task, the urgency of which is due to the widespread application of technologies for the deposition of hardening coatings. The interaction of sprayed particles with the surface of a processed material is three-dimensional, has a wide range of impact velocities (from 100 to 2000 m/s) and a high strain degree. The melted particles interacting with the surface can contain solid inclusions, which makes it difficult to simulate the behavior of this media. This paper represents the simulation results of melted viscous metal drops impacting with a cold surface, as well as the crystallization process using the SPH method. Computational methodThe paper considers a variant of the SPH method, namely a symmetrized method of smoothed particles. The SPH approximation of the unsteady heat transfer equations is used to calculate thermal conductivity.The symmetrized SPH method is conservative concerning the momentum, almost conservative concerning the energy, has a first-order time accuracy, but it has a low approximation accuracy of spatial derivatives (of order zero in the general case). The method allows free boundary problems to be solved.The method is based on nuclear approximation: