Recent experimental results demonstrate that electric field can effectively decrease the melting time of dielectric Phase Change Materials (PCMs). In this study, a Finite-Volume Method (FVM) based numerical model for the solid-liquid phase change heat transfer of dielectric PCM under the influence of electric field is presented. Fully coupled governing equations of electric potential, charge transport, Navier–Stokes equations, and the energy equation are implemented in the finite-volume framework of OpenFOAM®. The numerical model is first validated against the analytical solutions for several test cases in the hydrostatic regime. Results from the numerical model exhibit good agreement with the analytical solutions. The numerical model presented in this work is capable of capturing the sudden step change in the charge density distribution and electric field due to the discontinuity of the physical properties at the interface. A numerical analysis of EHD assisted melting of a dielectric PCM inside a rectangular cavity is considered. Effects of electric Rayleigh number $T$ and Stefan number $St$ on the rate of melting are discussed. The transient evolution of the EHD assisted melting process which includes different flow stages is analyzed. It is found that the electric Rayleigh number $T$ has a notable effect on the rate of melting and its influence is more pronounced at lower values of $St$. A maximum of 56.10$\%$ reduction in total melting time is achieved at $T=3000$ and $St=0.01,$ for the flow configuration considered here.

最近的实验结果表明，电场可有效减少介电相变材料（PCM）的熔化时间。在这项研究中，提出了一种基于有限体积法（FVM）的电介质PCM在电场影响下固液相变传热的数值模型。完全耦合的电势控制方程，电荷传输，Navier–Stokes方程和能量方程在OpenFOAM®的有限体积框架中实现。首先针对静水状态下几个测试案例的解析解验证了数值模型。数值模型的结果与解析解具有很好的一致性。这项工作中提出的数值模型能够捕获由于界面处物理性质的不连续而引起的电荷密度分布和电场中的突变。考虑了EHD辅助矩形腔内电介质PCM熔化的数值分析。电瑞利数的影响$Ť$ 和斯特凡号 $\mathrm{小号}Ť$对熔化速率进行了讨论。分析了包括不同流动阶段的EHD辅助熔化过程的瞬态演变。发现电瑞利数$Ť$ 对熔化速率有显着影响，并且在较低的熔点下影响更为明显。 $\mathrm{小号}Ť$。最多56.10$％$ 总熔化时间减少了 $Ť=3000$ 和 $\mathrm{小号}Ť=0.01，$ 对于此处考虑的流程配置。