Improved discrete unified gas-kinetic scheme for interface capturing.

In this paper, we extend the improved discrete unified gas-kinetic scheme (DUGKS) from solving the hydrodynamic equations to addressing the phase field equations, building upon our prior work [Wang et al., Phys. Fluids 35, 017106 (2023)10.

Lattice Boltzmann method for interface capturing.

Accurately solving phase interface plays a great role in modeling an immiscible multiphase flow system. In this paper, we propose an accurate interface-capturing lattice Boltzmann method from the perspective of the modified Allen-Cahn equation (ACE). The modified ACE is built based on the commonly used conservative formulation via the relation between the signed-distance function and the order parameter also maintaining the mass-conserved characteristic.

Experiments and Numerical Simulation of N-decane/Ethanol Bi-Component Droplet Evaporation.

The evaporation characteristics of n-decane-based bi-component or multi-component droplets have been veiled for application in advanced combustion. This paper proposes to experimentally investigate the evaporation of n-decane/ethanol bi-component droplets settled in the convective hot air, and numerically simulate the key parameters affecting the evaporation charactersitics. It was found that the evaporation behavior was interactively affected by the mass fraction of ethanol and the ambient temperature.

Effect of Nanoparticle Concentration on Physical and Heat-Transfer Properties and Evaporation Characteristics of Graphite/-Decane Nanofluid Fuels.

-Decane-based nanofluid fuels could be one of the most promising alternative fuels as aviation kerosene for aerospace application. However, the physical and heat-transfer properties of -decane-based nanofuels have been rarely studied, and the influence of the concentration of nanoparticles on the evaporation characteristics of -decane-based fuels has been sparsely investigated. This paper investigated physical and heat-transfer properties and evaporation characteristics of graphite/-decane nanofluid fuels and emphasized the concentration effect of adding graphite nanoplatelets (GNPs) on these characteristics.

Formation and Elimination of Satellite Droplets during Monodisperse Droplet Generation by Using Piezoelectric Method.

One of the key questions in the generation of monodisperse droplets is how to eliminate satellite droplets. This paper investigates the formation and elimination of satellite droplets during the generation of monodisperse deionized water droplets based on a piezoelectric method. We estimated the effects of two crucial parameters-the pulse frequency for driving the piezoelectric transducer (PZT) tube and the volume flow rate of the pumping liquid-on the generation of monodisperse droplets of the expected size.

Phase-field-based lattice Boltzmann modeling of large-density-ratio two-phase flows.

In this paper, we present a simple and accurate lattice Boltzmann (LB) model for immiscible two-phase flows, which is able to deal with large density contrasts. This model utilizes two LB equations, one of which is used to solve the conservative Allen-Cahn equation, and the other is adopted to solve the incompressible Navier-Stokes equations. A forcing distribution function is elaborately designed in the LB equation for the Navier-Stokes equations, which make it much simpler than the existing LB models.

[Surgical treatment combined with oral administration of indomethacin for eosinophilic granuloma of the skull: report of a pediatric case].

A 13-year-old girl presented headache for 5 d upon admission to hospital. An initial CT revealed 3 lesions located in her skull, the sizes of which were 2.5 cm×3.

Quantum chemistry study on the destruction mechanism of 2,3,7,8-TCDD by OH and O(3) radicals.

Due to its fundamental importance, the destruction mechanism of the dioxins, as exemplified by 2,3,7,8-TCDD, by OH and O3 radicals was investigated in detail employing Quantum Chemical Calculations in this paper. Theoretical results showed that, OH radical degraded 2,3,7,8-TCDD via substituting chlorine at the 2,3,7,8 positions, while O3 radical degraded 2,3,7,8-TCDD via destructing CC bonds and aromatic ring. Based on the mechanism study, the kinetic parameters of the reactions were also calculated by Transition State Theory.

[Application of cranioplasty materials in the past 60 years in China].

Cranioplasty is one of the oldest and most common surgeries. Cranioplasty materials developed with this surgery. Many kinds of material have been applied to cranioplasty such as gold, silver, aluminum, lead, platinum, titanium, autogenous bone, allograft, acrylic resin, polyethylene, silicone rubber, carol, ceramic, hydroxyapatite and calcium phosphate cement.

Dynamical phase of driven colloidal systems with short-range attraction and long-range repulsion.

We study the nonequilibrium dynamics of colloidal system with short-range depletion attraction and screened electrostatic repulsion on a disordered substrate. We find a growth-melting process of the clusters as the temperature is increased. By strengthening the screened electrostatic repulsion, a depinning transition from moving cluster to plastic flow is observed, which is characterized by a peak in threshold depinning force.

Suppression of spirals and turbulence in inhomogeneous excitable media.

Suppression of spiral and turbulence in inhomogeneous media due to local heterogeneity with higher excitability is investigated numerically. When the inhomogeneity is small, control tactics by boundary periodic forcing (BPF) is effective against the existing spiral and turbulence. When the inhomogeneity of excitability is large, a rotating electric field (REF) is utilized to "smooth" regional heterogeneity based on driven synchronization.

Influences of periodic mechanical deformation on spiral breakup in excitable media.

Influences of periodic mechanical deformation (PMD) on spiral breakup that results from Doppler instability in excitable media are investigated. We present a new effect: a high degree of homogeneous PMD is favored to prevent the low-excitability-induced breakup of spiral waves. The frequency and amplitude of PMD are also significant for achieving this purpose.

Control of spiral breakup by an alternating advective field.

The control of spiral breakup due to Doppler instability is investigated. It is found that applying an alternating advective field with suitable amplitude and period can prevent the breakup of spiral waves. Further numerical simulations show that the growing meandering behavior of a spiral tip caused by decreasing the excitability of the medium can be efficiently suppressed by the alternating advective field, which inhibits the breakup of spiral waves eventually.