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Relativistic Vlasov-Maxwell modelling using finite volumes and adaptive mesh refinement

Benjamin Svedung Wettervik (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Timothy Dubois (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Evangelos Siminos (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Tünde Fülöp (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers))
(2016)
[Preprint]

The dynamics of collisionless plasmas can be modelled by the Vlasov-Maxwell system of equations. An Eulerian approach is needed to accurately describe processes that are governed by high energy tails in the distribution function, but is of limited efficiency for high dimensional problems. The use of an adaptive mesh can reduce the scaling of the computational cost with the dimension of the problem. Here, we present a relativistic Eulerian Vlasov-Maxwell solver with block-structured adaptive mesh refinement in one spatial and one momentum dimension. The discretization of the Vlasov equation is based on a high-order finite volume method. A flux corrected transport algorithm is applied to limit spurious oscillations and ensure the physical character of the distribution function. We demonstrate a speed-up by a factor of five, because of the use of an adaptive mesh, in a typical scenario involving laser-plasma interaction in the self-induced transparency regime.



Denna post skapades 2016-08-27.
CPL Pubid: 240864

 

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Institutioner (Chalmers)

Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)

Ämnesområden

Plasmafysik

Chalmers infrastruktur