This paper reports a numerical investigation of the transcritical droplet vaporization phenomena. The simulation is based on the time-dependent conservation equations for liquid and gas phases, pressure-dependent variable thermophysical properties, and a detailed treatment of liquid-vapor phase equilibrium at the droplet surface. The numerical solution of the two-phase equations employs an arbi...

Abstract The enthalpies of vaporization/sublimation 2-, 3- and 4-methyl-acetophenones 3-, 4-cyano-acetophenones were derived from the vapor pressure temperature dependence measured with help gas saturation method. Enthalpies fusion 4-methyl-acetophenone 4-cyano-acetophenone by using DSC. literature thermochemical data for methyl-, ethyl, cyano- acetoxy-substituted acetophenones new results eval...

BACKGROUND Phase-shift nanoemulsions (PSNEs) provide cavitation sites when the perfluorocarbon (PFC) nanodroplets (ND) are vaporized to microbubbles by acoustic energy. Their presence lowers the power required to ablate tissue by high-intensity focused ultrasound (HIFU), potentially making it a safer option for a broader range of treatment sites. However, spatial control over the ablation regio...

INTRODUCTION Nephroureterectomy with perimeatal cystectomy is still the gold standard in the treatment of urothelial upper urinary-tract carcinoma (UUTC). Ureteral endoscopic surgery was proposed as a complementary first step in nephroureterectomy, in order to obviate the low abdominal incision. Our goal was to establish the value of a novel method of endoscopic distal ureteral management in on...

This research focuses on the development of a unified drop vaporization model for use in simulations of high-pressure spray combustion processes. Emphasis is placed on the analysis of supercritical and transcritical processes. These processes occur when a liquid drop that is initially at a subcritical temperature is injected into a high-pressure gaseous environment that exceeds the thermodynami...

In this work, we discussed the vaporization and gas species of ionic liquids (ILs) by a cluster approach of quantum statistical thermodynamics proposed by R. Luwig (Phys. Chem. Chem. Phys., 10, 4333), which is a controversial issue up to date. Based on the different sized clusters (2-12 ion-pairs) of the condensed phase, the molar enthalpies of vaporization (ΔvapH, 298.15 K, 1bar) of four repre...

In order to determine the energy needed to artificially dry a product, the latent heat of vaporization of moisture in the product, hfg, must be known. Generally, the expressions for hfg reported in the literature are of the form hfg = h(T)f(M), where h(T) is the latent heat of vaporization of free water, and f(M) is a function of the equilibrium moisture content, M. But expressions of this type...