Microconfined high-pressure transcritical fluid turbulence

Microfluidics technology has grown rapidly over the past decades due to its high surface-to-volume ratios, flow controllability, and length scales efficiently suited for interacting with microscopic elements. However, as a consequence of small rates mixing transfer they achieve operating under laminar regimes, utilization microfluidics energy applications long been key challenge. In this regard, result hydrodynamic thermophysical properties exhibit in vicinity pseudo-boiling region, it recently proposed that microconfined turbulence could be achieved by at high-pressure transcritical fluid conditions. Nonetheless, underlying mechanisms such systems are still not well characterized, and, thus, need carefully investigated. This work, consequently, analyzes supercritical computing direct numerical simulations ([Formula: see text]) N 2 conditions imposed temperature difference between bottom top walls friction Reynolds number [Formula: text] (bottom wall). The results obtained indicate can conditions, leading heat increments up text], respectively, respect equivalent low-pressure systems. addition, is found near-wall physics deviates from single-phase boundary layer theory presence baroclinic instability hot/top wall. generated combination external force driving large variation density across which strongly modifies behavior wall renders present “law wall” transformation models inaccurate.