This study numerically presents the transient behaviour of complete evaporation process inside porous channel. Based on the modified enthalpy formulation under non-Darcy flow and Local Thermal Non-Equilibrium (LTNE) conditions, solutions have been obtained utilizing the finite volume method for various relevant parameters. The results have been validated with the experiments and they show good agreement between them. The results demonstrate that LTNE model should be employed while modelling the transient complete evaporation process in porous media. The non-Darcy effects have considerable influences on the locations of the initiation and termination of the phase change processes as compared to Darcy flow model. Therefore, the behaviours of the two-phase and the superheated vapour zones, when the steady-state solutions is reached, are substantially changed for non-Darcy flow as compared to Darcy model due this assumption provides an additional mechanism for heat transfer that represented by the heat exchange between the solid and fluid phases. It has been observed that the two-phase zone is considerably extended in the axial direction and this zone has not been occupied a large size towards transverse direction due to the axial velocity is noticeably higher than the transverse velocity, caused by reducing the diffusive energy through the two-phase region. The results indicate that non-Darcian effects leads to considerably extend the size of superheated region towards the outlet of the channel, which is not the case for Darcy model. The non-Darican effects become more pronounced for high Reynolds number and heat flux. The influences of varying in Reynolds number, heat flux, porosity, and solid thermal conductivity are substantial near the heated surface, whereas Darcy number has a minor impact on the solution of complete evaporation process. It can be emphasised from the present predictions that the non-Darcy flow along with LTNE condition is indispensable model for the complete evaporation process, especially under high mass flowrate as well heat flux.

这项研究以数值方式提出了多孔通道内部完全蒸发过程的瞬态行为。基于在非达西流动和局部热非平衡（LTNE）条件下的改进焓公式，利用有限体积方法针对各种相关参数获得了解决方案。实验已经验证了结果，并且它们之间显示出良好的一致性。结果表明，在对多孔介质中的瞬态完全蒸发过程进行建模时，应采用LTNE模型。与达西流模型相比，非达西效应对相变过程的起始和终止位置有很大影响。因此，当达到稳态解时，两相和过热蒸气区的行为 与非达西流动相比，非达西流动发生了显着变化，因为这种假设为固相和液相之间的热交换所代表的热传递提供了另一种机制。已经观察到，两相区域在轴向方向上相当大地延伸，并且由于轴向速度显着高于横向速度，该两相区域在横向方向上并未占据较大的尺寸，这是由于通过降低扩散能而引起的。两相区域。结果表明，非达西效应会导致过热区域的尺寸向通道出口显着扩展，达西模型并非如此。对于高雷诺数和热通量，非达里肯效应变得更加明显。雷诺数，热通量，孔隙率和固体热导率在受热面附近相当大，而达西数对完全蒸发过程的溶液影响较小。从目前的预测可以强调，非达西流和LTNE条件是整个蒸发过程必不可少的模型，尤其是在高质量流量和热通量下。