Giulio Ballerini
OCA - giulio.ballerini@oca.euAlongside direct high-resolution measurements, numerical simulations play a key role in modeling of plasma dynamics. For this reason, the choice of an adequate plasma model is crucial. Since full kinetic models are computationally very demanding to implement, reduced models, such as hybrid models, are needed. This project focuses on the validation of the Hybrid-Vlasov-Landau Fluid (HVLM) model, in which the ions are fully kinetic and the electrons are treated as an anisotropic fluid with a Landau-fluid closure. In order to validate the model, we compare multiple dispersion relations of plasma waves and instability, namely (i) the Kinetic Alfven Waves, (ii) the Firehose instability and (iii) the Mirror instability, with the one expected from linear full-kinetic theory. The HVLF model allows us to obtain, for both waves and instability, the full-kinetic linear dispersion relations while reducing the computational time with respect to full-kinetic models.