arXiv subjects

Nicolae Pometescu

Publications and source records attributed to Nicolae Pometescu.

2 recordsLinked to original sources

arXiv2017

Minimization algorithm in the simulation of the Wall Touching Kink Modes

In this paper the discretized variational principle in the simulation of the Wall Touching Kink Modes (WTKM) is reformulated in terms of independent variables and a corresponding constrained minimization algorithm is elaborated. In a frame of a general formalism is proposed an algoritm for constrained linear minimization adapted to this class of problems. The FORTRAN programme that realize the algorithm is described.

physics.plasm-ph↗

arXiv2016

Maximal entropy distribution functions from generalized Rényi entropy

New class of reference distribution functions for numerical approximation of the solution of the Fokker-Planck equations associated to the charged particle dynamics in tokamak are studied. The reference distribution functions are obtained by maximization of the generalized Renyi entropy under scale-invariant restrictions. Explicit analytic form, with algebraic decay, that is a generalization of the previous distribution with exponential tails was derived.

cond-mat.stat-mech↗