Abstract A visual observation experiment mimicking the pressure history in foam injection molding was utilized to infer bubbles formation core‐back operations. The different stages of bubble nucleation, dissolution, and re‐nucleation, corresponding injection, packing, opening, respectively, were studied. reduction number density re‐nucleated with respect first nucleation observed. In order unde...

We performed molecular dynamics (MD) simulations of nucleation from vapor at temperatures below the triple point for systems consisting of 10 4-10 5 Lennard-Jones (L-J) type molecules in order to test nucleation theories at relatively low temperatures. Simulations are performed for a wide range of initial supersaturation ratio (S 0 10 − 10 8) and temperature (kT = 0.2 − 0.6ε), where ε and k are...

The thermodynamics of surface-stimulated crystal nucleation demonstrates that if at least one of the facets of the crystal is only partially wettable by its melt, then it is thermodynamically more favorable for the nucleus to form with that facet at the droplet surface rather than within the droplet. So far, however, the kinetic aspects of this phenomenon had not been studied at all. In the pre...

The pace of deforestation worldwide has necessitated the development of strategies that restore forest cover quickly and efficiently. We review one potential strategy, applied nucleation, which involves planting small patches of trees as focal areas for recovery. Once planted, these patches, or nuclei, attract dispersers and facilitate establishment of new woody recruits, expanding the forested...

We have performed large-scale Lennard-Jones molecular dynamics simulations of homogeneous vapor-to-liquid nucleation, with 10(9) atoms. This large number allows us to resolve extremely low nucleation rates, and also provides excellent statistics for cluster properties over a wide range of cluster sizes. The nucleation rates, cluster growth rates, and size distributions are presented in Diemand ...

Density functional theory calculations are employed to investigate the energetics of point defects—monovacancy, self-interstitials (tetrahedral, octahedral and dumbbell) and Frenkel pairs— in aluminum under tensile hydrostatic stresses. Our study suggests that the defect core-energy of a vacancy, which is governed solely by the electronic-structure at the core, significantly depends on the macr...

The Nck adaptor protein recruits cytosolic effectors such as N-WASP that induce localized actin polymerization. Experimental aggregation of Nck SH3 domains at the membrane induces actin comet tails--dynamic, elongated filamentous actin structures similar to those that drive the movement of microbial pathogens such as vaccinia virus. Here we show that experimental manipulation of the balance bet...

Li nucleation on graphite anode probed using large-scale grand-canonical density functional theory simulations in electrolyte environment under applied voltage Li-ion batteries.

Density functional theory is applied to the study of gas-to-liquid nucleation in binary and ternary mixtures with one amphiphilic component. The theory allows the evaluation of density profiles and molecular orientation distributions in the critical nucleus. The predicted cluster compositions for binary and ternary systems resemble qualitatively the experimental behavior for water–n-alcohol and...

Nucleation and growth of holes in free-standing ultrathin (<100 nm) polymer films are examined via opticalmicroscopy in order to gain a better understanding of these phenomena.Hole nucleation is quantified with a free energy barrier based on a simple capillary model. Additionally, holes are found to grow exponentially in accordance with previous studies in the literature. Ultrathin films of pol...