What question did this study set out to answer?

This research aims to develop a conservative drift-reduced fluid plasma model that adheres to conservation principles.

February 19, 2026Open Access

Conservative formulation of the drift-reduced fluid plasma model

BLBrenno De LuccaPlasma Technology (United States)PRPaolo RicciPlasma Technology (United States)MBMicol BassaniniInstitute of Mathematics and Informatics

Key Points

This research aims to develop a conservative drift-reduced fluid plasma model that adheres to conservation principles.
Analytically invert an implicit relation for polarisation velocity and electric field.
Construct a model applicable in arbitrary magnetic geometry.
Incorporate effects of electromagnetic fluctuations.
The model ensures conservation of energy, mass, charge, and momentum.
Conservation laws are satisfied under varying magnetic geometries.
Robustness is shown even with the inclusion of electromagnetic fluctuations.

Abstract

A conservative formulation of the drift-reduced fluid plasma model is constructed by analytically inverting the implicit relation defining the polarisation velocity as a function of the time derivative of the electric field. The obtained model satisfies exact conservation laws for energy, mass, charge and momentum, in arbitrary magnetic geometry, also when electromagnetic fluctuations are included.

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