The importance of liquid viscosity in chemical process design makes it one of the most measured transport properties. Nevertheless, of the 1893 compounds in the DIPPR 801 pure-component database, liquid viscosity and its temperature dependence (at 1 atm, or 0.1 MPa) have been predicted for nearly 50% of the compounds because no experimental data are available. Unfortunately, prediction methods ...

Performance enhancement of the two-phase flow boiling heat transfer process in microchannels through implementation of surface micro- and nanostructures has gained substantial interest in recent years. However, the reported results range widely from a decline to improvements in performance depending on the test conditions and fluid properties, without a consensus on the physical mechanisms resp...

When boiling occurs in a liquid flow field, the phenomenon is known as forced-convection boiling. We numerically investigate such system on cylinder at saturated conditions. To deal with complicated liquid–vapor phase-change phenomenon, we develop numerical scheme based pseudopotential lattice Boltzmann method (LBM). The collision stage performed space of central moments (CMs) to enhance stabil...

Experiments were performed to study subcooled film boiling of performance liquid PF5060 (made by 3-M Company) on a horizontal copper disc. The experiments were performed for two regimes of film boiling involving departing vapor bubbles (low subcooling) and nondeparting vapor bubbles (high subcooling). By employing high speed digital camera, data were obtained for temporal variation of bubble he...

In the previous laboratory experiment, we saw how the intermolecular forces between molecules determined the boiling point of a liquid. Distillation was one method which could be used to separate (or purify) chemical compounds. Unfortunately, distillation is not always a practical method to employ for purifications. Large molecules can have extremely high boiling points, even under reduced pres...

During phase change at the bubble-liquid interface, under subcooled boiling conditions, noncondensable gases dissolved in the liquid will be injected into the bubble along with vapor. Due to heat transfer into subcooled liquid, vapor will condense in the upper regions of the bubble while noncondensables will continue to accumulate. Subsequently, thermocapillary convection caused by nonuniform s...

In this tutorial the fundamentals of non-boiling heat transfer in two-phase twocomponent gas-liquid flow in pipes are presented. The techniques used for the determination of the different gas-liquid flow patterns (flow regimes) in vertical, horizontal, and inclined pipes are reviewed. The validity and limitations of the numerous heat transfer correlations that have been published in the literat...

INTRODUCTION The superheated drop detector (SDD) is composed of droplets of a sensitive liquid with low-boiling point and a medium supporting the droplets dispersed throughout the medium. The SDD has been mainly used for neutron dosimetry and recently also for γ -rays. However the conditions of bubble formation have been discussed for neutrons but there have been a little works for gamma-rays. ...

The influence of the initial fuel temperature on the burning behavior of n-heptane pool fire was experimentally studied at the State Key Laboratory of Fire Science (SKLFS) large test hall. Circular pool fires with diameters of 100mm, 141 mm, and 200 mm were considered with initial fuel temperatures ranging from 290 K to 363 K. Burning rate and temperature distributions in fuel and vessel wall w...