In this paper, we present a class of finite volume trigonometric weighted essentially non-oscillatory (TWENO) schemes and use them as limiters for Runge-Kutta discontinuous Galerkin (RKDG) methods based on trigonometric polynomial spaces to solve hyperbolic conservation laws and highly oscillatory problems. As usual, the goal is to obtain a robust and high order limiting procedure for such a RK...

In the present paper a fourth/fifth order upwind biased limiting strategy is presented for the simulation of turbulent flows and combustion. Because high order numerical schemes usually suffer from stability problems and TVD approaches often prevent convergence to machine accuracy the multi-dimensional limiting process (MLP) [1] is employed. MLP uses information from diagonal volumes of a discr...

Measurements of fast phenomena in the vicinity of a limiter inserted into a linear plasma column are shown in this work. The results were conducted at the plasma generator PSI-2 (Humboldt Universitaet zu Berlin, Germany) which provides a stationary plasma produced in a DC arc discharge. The plasma near a tungsten limiter was imaged on a photomultiplier tube equipped with 16 anodes. The photomul...

We report on the detection by means of Raman spectroscopy amorphous beryllium deuteride, BeD 2 , in magnetron sputtered deposits synthesized two different laboratories and containing about 20 at.% deuterium. In contrast, this signature has not been found for JET limiter samples studied coming from inner, outer or upper limiters, even when a deposition zone limiters. give way to disentangle that...

despite all attractions of social participation in most parts of the rural development, due to the lack of practical approaches, it has just remained an advertising slogan. one of the necessities of rural development is the execution of plans which enjoy maximum social acceptance. one of these plans is locating and equipping high-order service settlements. using an operative process including e...

Engine speed limiters are safety devices to prevent the engine to exceed a predetermined high speed. The presented speed limiter is designed for large load variations which requires accurate and fast Air-Fuel ratio control. It is based on feedback linearization and on-line estimation of the load torque. Experimentations was done with a Sea-Doo r © watercraft powered by a Rotax r © four-stroke e...

We present a simple, robust numerical method for solving the two-layer shallow water equations with arbitrarybottom topography.Using the techniqueof operator splitting,we write the equationsas a pair of hyperbolic systems with readily computed characteristics, and apply third-order-upwind differences to the resulting wave equations. To prevent the thickness of either layer from vanishing, we mo...