Akademik Veri Yönetim Sistemi
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, cilt.254, ss.1, 2026 (SCI-Expanded)
Geometrical-based interventions have great potential and research interest for improvement of flow boiling performance regarding micro-scale heat sinks due to intricate relation between geometry and flow physics. In relevant systems, disadvantages related to pressure drop must be eliminated, and an enhancement must be provided in heat transfer, simultaneously. In this regard, facilitating vapor evacuation by providing additional forces and as well as additional mechanisms and improving surface interaction with liquid phase are important physical phenomena that must be ensured for micro-boiling systems, and these phenomena can be realized by suitable geometrical designs. Thus, here, a novel heat sink (expanding double pool heat sink, EDP) was introduced, and flow boiling characteristics were revealed comparing via ordinary design (UPF). Heating power and mass flux were operational parameters, with range of them are 100–300W; (148 to 460 kWm-2) and 175–275 kgm-2s-1, respectively. The EDP increases heat transfer coefficients up to 84.9% for G=175 kgm-2s-1, 350% for G=225 kgm-2s-1 and 141% for G=275 kgm-2s-1, compared to UPF. For all mass-fluxes, EDP presents a lower pressure drop up to 40.1%. Performance evaluation criterion of EDP changes between 1.2 and 5.3 (reference is UPF). The unbalanced surface tension force plays a critical role.