Imagine writing the whole article without ever so much as mentioning ions or plasma, never mind plasma fluid dynamics. What matter is supposed to be affected by magnetic fields? What generates them? What effects do electric currents induced by varying fields have on mixing and segregation?
That plasma fluid effects are routinely neglected is a disgrace, an indictment of everybody who pretends to be serious about studying the topic.
The article abstract mentions MHD, the trivial cousin of plasma fluid dynamics. MHD mostly occurs only in artificially stabilized environments designed to prevent mathematically intractable phenomena. Modeling while avoiding general PFD is looking for your keys under the streetlamp solely because the light is better there.