Abstract

A three-dimensional model is presented for the prediction of solidification behavior using a nonlinear transformation of the enthalpy equation in a Smoothed Particle Hydrodynamics (SPH) discretization. The effect of phase change in the form of release and absorption of latent heat is implemented implicitly as variable source terms in the enthalpy calculation. The developed model is validated against various experimental, analytical, and numerical results from the literature. Results confirm accuracy and robustness of the new procedure. Finally, the SPH model is applied to a study of suspension plasma spraying (SPS) by predicting the impact and solidification behavior of molten ceramic droplets on a substrate.

摘要

提出了一个三维模型，用于在平滑粒子流体动力学 (SPH) 离散化中使用焓方程的非线性变换来预测凝固行为。以释放和吸收潜热的形式出现的相变效应在焓计算中隐含地作为可变源项实现。开发的模型根据文献中的各种实验、分析和数值结果进行了验证。结果证实了新程序的准确性和稳健性。最后，通过预测熔融陶瓷液滴在基材上的冲击和固化行为，将 SPH 模型应用于悬浮等离子喷涂 (SPS) 的研究。