Abstract—Liquid spray heat exchanger is the critical equipment of temperature regulating system by gaseous nitrogen which realizes the environment temperature in the range of -180 °C~+180 °C. Liquid nitrogen is atomized into smaller liquid drops through liquid nitrogen sprayer and then contacts with gaseous nitrogen to be cooled. By adjusting the pressure of liquid nitrogen and gaseous nitrogen...

During sintering a powder compact gains strength through low-temperature interparticle bonding, usually induced by solid-state surface diffusion, followed by further strength contributions from high-temperature densification. In cases where a liquid phase forms, sintering densification is accelerated and shape retention is sustained while open pores remain and contribute capillary forces. Unfor...

we have used a variational approach to calculate some thermodynamic properties of the quasi-one dimensional liquid 3he such as the energy, entropy, free energy, equation of state and heat capacity at finite temperature. we have employed the lennard-jones potential as the inter-atomic interaction. we have seen that the total energy increases by increasing both temperature and density. as expecte...

While ordinary glasses transform into supercooled liquid via a homogeneous bulk mechanism, thin film glasses of higher stability transform heterogeneously by a front propagating from the surface and/or the interfaces. In this work, we use quasi-adiabatic fast scanning nanocalorimetry to determine the heat capacity of thin glassy layers of indomethacin vapor-deposited in a broad temperature rang...

Ionic liquid crystals (ILCs) are anisotropic mesogenic molecules which carry charges and therefore combine properties of liquid crystals, e.g. the formation of mesophases, and of ionic liquids, such as low melting temperatures and tiny triple-point pressures. Previous density functional calculations have revealed that the phase behavior of ILCs is strongly affected by their molecular properties...

The dynamic aspects of droplet impingement on a porous ceramic surface were studied experimentally. Single-shot flash photography was used to photographically record the deformation and spreading on the surface. The observations were made with ambient pressure (0.10 MPa), ambient temperature (cu. 22”C), initial droplet diameter (1.5 mm), and the impact Weber number (43) fixed. The primary param...

Shock-wave experiments on pure iron preheated to 1573 K were conducted in the 17-73 GPa range. The shock-wave equation of state ofy-iron at an initial temperature of 1573 K can be fit with u, = 4.102 (0.015) km/s + 1.610(0.014) up with p 0 = 7.413±0.012 Mg/m• We obtain for y-iron's bulk modulus and pressure derivative the values: 124.7±1.1 GPa and 5.44±0.06, respectively. We present new data fo...

Evaporation and explosive boiling of ultra-thin liquid film are of great significant fundamental importance for both science and engineering applications. The evaporation and explosive boiling of ultra-thin liquid film absorbed on an aluminum nanostructure solid wall are investigated by means of molecular dynamics simulations. The simulated system consists of three regions: liquid argon, vapor ...

Reducing environmental pollution via elimination of sulfur compounds from gas condensate was the aim of this research. Whereby oxidative desulfurization from gas condensate with 3200 ppm initial sulfur was accomplished by hydrogen peroxide (30%wt) as oxidant and formic acid as catalyst. The sulfones after generation in the oxidation step were extracted through a method of liquid-liquid extracti...

This report provides an initial study in thermocapillary induced flow in a microchannel through a two-dimensional volume of fluid model. A non-mechanical pumping mechanism, thermocapillary pumping (TCP), for moving a nL-sized drop within the channel is described. In TCP, one end of the drop is heated to create a surface tension difference between the ends of the drop resulting in drop motion. T...