Porous-type anodic oxide with re-entrant structures formed by two distinct anodizing processes suppressed the delay of boiling initiation. Even after long-term boiling, nanostructured surface maintained its structure. Moreover, cooling performance hydrofluoroether-7100 was equal to that before test.

In protoplanetary disks, the water snowline marks location where ice-rich pebbles sublimate, releasing silicate grains and vapor. These processes can trigger pile-ups of solids, making a promising site for forming planetesimals. However, previous studies exploring pile-up conditions typically employ 1D, vertically-averaged isothermal assumptions. this work, we investigate how 2D flow pattern realistic temperature structure affect at latent heat effects leave observational imprints. We...

In protoplanetary disks, the water snowline marks location where inwardly drifting, ice-rich pebbles sublimate, releasing silicate grains and vapor. These processes can trigger pile-ups of solids, making a promising site for formation planetesimals, instance, via streaming instabilities. However, previous studies exploring dust pile-up conditions have typically employed 1D, vertically averaged, isothermal assumptions. this work, we investigate how 2D flow pattern realistic temperature...

To enhance the reliability of in-vessel retention techniques during a nuclear power plant hazard, viability seawater as coolant to flood reactor pressure vessel was investigated. Pool boiling distilled water, 3.5 wt. % artificial seawater, and 7.0 highly concentrated performed on 30-mm-diameter Cu bare surface (BS) with honeycomb porous plate (HPP). The results revealed an increase in critical heat flux (CHF) both solutions, BS, when compared water. improvement wettability by sea salt...

To improve tribological characteristics of dies for cold forging, micro valleys were formed on surface cemented tungsten carbide by shot peening. The mean period the roughness profile (RSm) peened (SP) die was approximately 1/3 times shorter that conventional mechanical polished (MP) die. distribution peaks and (Rsk) close to symmetric in SP (Rsk = 0), while it skewed toward MP < 0). lubrication performance investigated ring compression test a titanium workpiece. dominant factor friction...

The rates of fish bone softening and solubilization organic matter from it were determined in dilute acetic acid concentration ranging 0.0% to 3.0% at temperatures 80°C 140°C. the first-order constant softening, kh(min−1), was described by following experimental equation. where T is absolute temperature, °K, Ca concentration, %, R gas constant, 8.314J K−1mol−1. hardness bones approximately proportional fourth power normalized weight residual (the ratio cooked that raw bone). On other hand,...

Since boiling is a phenomenon with high heat transfer performance, it expected to be used in various industrial fields such as emergency cooling nuclear power plants, device for EVs and next-generation CPU data centers. So far, research on have been carried out the background of these trends. In particular, many studies conducted improve critical flux (qCHF) which limit transfer. However, since mechanism qCHF complex phenomenon, methods improvement are still unconstructed. Here we...

Drop size was measured in gas- liquid- liquid system bubble columns, 6.6 cm and 12.2 diameter, which several kinds of organic liquids were used as dispersed phase. The sauter mean diameter droplets the column, dp [cm], is mainly dependent on column DT superficial gas velocity, uG [cm/sec], interfacial tension, σ [dyne/cm] concentration droplets, C [-]. However, range >0.1, little affected by can be correlated following equations.In batch operation, dp/DT=15 (uG2/gDT) (DTuG2ρ/σ) -1.3where g...

Several studies have proposed the use of nanofluids to enhance in-vessel retention (IVR) capability in severe accident management strategy implemented at certain light-water reactors. Systems using for IVR must be applicable large-scale systems, i.e., infinite heated surfaces. However, effect size heater with nanoparticle deposition was revealed that CHF is decreased increased size. On other hand, a honeycomb porous plate shown experimentally more than twice plain surface diameter 30 mm,...

Abstract Six new gem‐dicyanocyclobutanes containing carbomethoxy and hydroxyl/acetoxy functions were synthesized by cycloaddition of the appropriate vinyl ethers or alkoxystyrenes to methyl β,β‐dicyanoacrylate. They proved be too thermally labile allow polycondensation potentially piezoelectric linear polyesters.

Cooking rate of spines mackerels was experimentally examined at various temperatures in distilled water. Hardness (F/a) determined by the mimum load applied shearing sample, F(N), divided maximum width a(m). Softening could be described as a first-order reaction with reference to hardness activation energy 61 kJ/mol. Solubilization organic matter and release ash from fish bones were determined. also process 73 Ash not released bone during cooking. after cooking proportional fourth power...