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A forward semi-Lagrangian method for the numerical solution of the Vlasov equation

机译:Vlasov方程数值解的正向半拉格朗日方法

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This work deals with the numerical solution of the Vlasov equation, which provides a kinetic description of the evolution of a plasma, and is coupled with Poisson's equation. A new forward semi-Lagrangian method is developed. The distribution function is updated on a Eulerian grid, and the pseudo-particles located on the mesh nodes follow the characteristics of the equation forward for one time step, and are deposited on the 16 nearest nodes. This is an explicit way of solving the Vlasov equation on a grid of the phase space, which makes it easier to develop high-order time schemes than the backward method.
机译:这项工作涉及Vlasov方程的数值解,该解提供了等离子体演化的动力学描述,并与Poisson方程耦合。提出了一种新的正向半拉格朗日方法。分布函数在欧拉网格上更新,位于网格节点上的伪粒子将方程式的特征向前推进一个时间步,并沉积在16个最近的节点上。这是一种在相空间网格上求解Vlasov方程的显式方式,与后向方法相比,它更易于开发高阶时间方案。

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