We present the results from dissipative particle dynamics (DPD) simulations of phase separation dynamics in ternary (ABC) fluids mixture in d = 3 where components A and B represent the simple fluids, and component C represents a polymeric fluid. Here, we study the role of polymeric fluid (C) on domain morphology by varying composition ratio, polymer chain length, and polymer stiffness. We observe that the system under consideration lies in the same dynamical universality class as a simple ternary fluids mixture. However, the scaling functions depend upon the parameters mentioned above as they change the time scale of the evolution morphologies. In all cases, the characteristic domain size follows l(t) ∼ tφ with dynamic growth exponent φ, showing a crossover from the viscous hydrodynamic regime (φ = 1) to the inertial hydrodynamic regime (φ = 2/3) in the system at late times.
A comparison of appressed teeth-like structures, coined tempers, on the flagellum of the male internal sac among 10 North American and one Asian species of tiger beetles is consistent with earlier proposed genera of Cicindela Linné, ranked here as subgenera. Based on scanning electron photomicrographs, observations revealed that the flagellum has a single groove along its whole length, with tempers in the groove, and for most species tempers are present only on one side of the ungrooved flagellar surface; tempers point basally (proximally) both on the flagellar surface and within the flagellar groove; and a distributional pattern of the tempers appears to be unique to each subgenus. The species Cicindela punctulata Olivier and Cicindela lepida Dejean have a lumen in place of a flagellar groove, the former with tempers on the ungrooved flagellar surface and the latter without. Tempers on the ungrooved surface of the flagellum are assumed to grip the inner wall of the spermathecal duct while penetrated by the flagellum during insemination or preinsemination clearing. The presence of tempers on one side of the flagellum promotes rapid, smooth insertion and removal of the flagellum from the duct. It is proposed that tempers of the flagellar groove assist the flow of seminal materials to the spermatheca by guiding the narrow neck of the spermatophore into the spermathecal duct while the flagellum is inserted.
We present the results from comprehensive Monte Carlo (MC) simulations of ordering kinetics in d = 2 liquid crystals (LCs). Our LC system is described by the two-component Lebwohl-Lasher model with long-ranged interactions, V(r) ∼ r(-n). We find that systems with n ≥ 2 show the same dynamical behavior as the nearest-neighbor case (n = ∞). This contradicts available theoretical predictions.
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