Nanoparticle migration in nanofluid film boiling: A numerical analysis using the continuous-species-transfer method

• DOI: 10.1016/j.ijheatmasstransfer.2024.125344
• Publication Date: 2024-02-28T03:45:52Z
• Authors: A. Yahyaee; J. Hærvig; H. Sørensen
• Keywords: Thermophoresis; Leidenfrost effect

Investigating the boiling behavior of nanofluids remains a topic considerable research interest. The existing theoretical framework often underscores Brownian motion and thermophoresis among predominant mechanisms that influence nanoparticles' movement within nanofluids. However, most current numerical models addressing nanofluid either neglect these or incorporate them inadequately. A comprehensive review literature reveals two primary gaps. larger set studies on does not account for any governing equation nanoparticle concentration, neglecting movement. smaller includes such an but limits its application to vapor domain, thereby overlooking liquid phase. Moreover, in context film involving nanofluids, insulating forms between heated surface. This is dynamic, experiencing evaporation at outer boundary, leading increase concentration vapor-liquid interface—another aspect always neglected models. To address gaps, this study introduces specialized employing Continuous-Species-Transfer method Computational Multi-Fluid Dynamics. Importantly, it also incorporates equations nanoparticles. method's efficacy further corroborated by solving two-dimensional axisymmetric problem vertical cylinder, with results aligning well analytical consider thermophoretic behavior. Overall, fills critical gap providing tool examining complex interfacial behaviors boiling.