This paper describes the development of the stream-tube based dispersion model for modeling contaminant transport in open channels. The operator-splitting technique is employed to separate the 2D contaminant transport equation into the pure advection and pure dispersion equations. Then the total variation diminishing (TVD) schemes are combined with the second-order Lax-Wendroff and third–order ...

The cover illustrates reflective optical limiters that incorporate phase-transition vanadium dioxide into arrays of metallic aperture antennas. As demonstrated by Mikhail A. Kats and co-workers in article number 2100001, these devices have broadband transmittance for low-intensity illumination high reflectance when the incident intensity increases, thus help protect sensitive detectors from hig...

BACKGROUND Studies of the normal zone in high-temperature superconducting wires are extremely important for power applications, such as fault current limiters, motors, cables etc. We studied the temperature distribution and normal domain propagation in high-temperature superconducting YBCO tape with highly resistive substrate. FINDINGS For applied voltages exceeding a certain threshold value ...

Computational fluid dynamics is a direct modeling of physical laws in discretized space. The basic include the mass, momentum and energy conservations, numerical scale-consistent transport process, similar domain dependence influence wave propagations. Therefore, physically soundable scheme should be compact one which involves closest neighboring cells within for solution update under CFL numbe...

Discontinuities usually appear in solutions of nonlinear conservation laws even though the initial condition is smooth, which leads to great difficulty in computing these solutions numerically. The Runge-Kutta discontinuous Galerkin (RKDG) methods are efficientmethods for solving nonlinear conservation laws, which are highorder accurate and highly parallelizable, and can be easily used to handl...

We present a detailed characterization of passive, picosecond optical-power-limiting devices using tightly focused beams in thick semiconductor samples. This study of limiting in ZnSe with 30-psec, 532-nm pulses shows that the resulting internal self-action (two-photon absorption plus free-carrier self-defocusing) protects the bulk material from optical damage. Simple scaling relations were det...

Safety and reliability of electrical actuators are essential for success all electric more aircrafts (MEA). Torque limiters improve the electromechanical (EMA) by restricting amount force experienced actuator drive train components. If transmitted torque in shaft exceeds a limit, it gives way controlled manner. This protects from potential failure jamming. In this paper, different types existin...

We present a new perspective on the use of weighted essentially nonoscillatory (WENO) reconstructions in high-order methods for scalar hyperbolic conservation laws. The main focus this work is nonlinear stabilization continuous Galerkin (CG) approximations. proposed methodology also provides an interesting alternative to WENO-based limiters discontinuous (DG) methods. Unlike Runge–Kutta DG sche...

a r t i c l e i n f o This paper presents a shock detection technique based on Moving Least Squares reproducing kernel approximations. The multiresolution properties of these kinds of approximations allow us to define a wavelet function to act as a smoothness indicator. This MLS sensor is used to detect the shock waves. When the MLS sensor is used in a finite volume framework in combination wit...