In this paper, modelling gas–liquid bubbly flows is achieved by the introduction of a population balance equation combined with the three-dimensional two-fluid model. For gas–liquid bubbly flows without heat and mass transfer, an average bubble number density transport equation has been incorporated in the commercial code CFX5.7 to better describe the temporal and spatial evolution of the geome...

In a hydraulic jump, the turbulent flow region between the upstream supercritical flow and downstream subcritical flow is called the jump roller. The turbulence development in the jump roller leads to substantial energy dissipation as well as free-surface fluctuations, oscillations of jump position, air entrainment and unstationary velocity field. The time scales of these motions cover a broad ...

When a refrigeration plant operates with a large difference between condensing and evaporating pressures, multistage operation is required to obtain an acceptable performance. In two-stage systems, vessels that combine flash-gas removal and intercooling are commonly used. The disadvantage of these vessels is the large amount of refrigerant required for proper operation. An alternative for these...

Void fraction is one of the key parameters for gas-liquid study and detection nuclear power system state. Based on fully convolutional neural network (FCN) high-speed photography, an indirect void measure approach flow boiling condition in narrow channels developed this paper. Deep learning technique applied to extract image features can better realize identification gas liquid phase complicate...

Amniotic fluid at 15-20 weeks contains high concentrations of microvillar enzymes which serve as markers for the prenatal diagnosis of cystic fibrosis. We found that these enzymes were mostly bound to amniotic fluid particulate fraction which eluted in the void volume on Sepharose 6B chromatography and precipitated in ultracentrifugation at 100,000g. Electron microscopy showed that the particul...

We extend the results from the first part of this series of two papers by examining hyperuniformity in heterogeneous media composed of impenetrable anisotropic inclusions. Specifically, we consider maximally random jammed (MRJ) packings of hard ellipses and superdisks and show that these systems both possess vanishing infinite-wavelength local-volume-fraction fluctuations and quasi-long-range p...

Due to the lack of understanding in the literature of channel height effects on forced-convection boiling and critical heat flux (CHF) in rectangular channels, experiments were performed with FC-72 at 1.36 bar for channel heights of 2, 5, and 10 mm. Boiling heat transfer from a linear array of nine discrete heat sources simulating microelectronic chips was investigated for velocity and liquid s...

The basic protein fraction of ovine uterine secretions collected late in pregnancy (Days 125-140) contains a substance capable of inhibiting in vitro blastogenic responses of lymphocytes to phytohemagglutinin (PHA) or mixed lymphocyte reactions. In this study, the immunosuppressive substance in the basic protein fraction of uterine secretions was further defined by gel filtration. The immunosup...

We study the distribution of X-ray selected clusters of galaxies with respect to superclusters determined by Abell clusters of galaxies and show that the distribution of X-ray clusters follows the supercluster-void network determined by Abell clusters. We find that in this network X-ray clusters are more strongly clustered than other clusters: the fraction of X-ray clusters is higher in rich su...