Cascades of turbulent kinetic energy and multicomponent scalars in a momentum-scalar coupling turbulence driven by multiple mechanisms under homogeneous and isotropic hypotheses

Turbulence is ubiquitous in our world, attributed to diverse mechanisms that may act alone or together. Traditionally, inspired by the reductionist approach, the dominant turbulence-inducing mechanism has been isolated and minor ones neglected. However, are the minor factors truly negligible? Recent research, grounded in conservation of kinetic energy and multicomponent scalar variance fluxes, suggests otherwise. Even weaker mechanisms, such as electric body forces, can significantly influence the cascades of turbulence in the presence of a dominant mechanism like buoyancy-driven turbulence, leading to the emergence of new scaling indices and diverse observations in real-world turbulence.