Energy transfer between scales and position in a turbulent recirculation bubble
The energy transfer among the different scales of the turbulent structures is analysed by means of the generalised Kolmogorov equation (GKE). The equation is applied to a turbulent channel with the addition of a bump which creates a strong shear layer and separation bubble. The GKE can provide an intricate description of the energy scale-by-scale budget in both physical and separation space, through the identification of the regions of production and dissipation of energy. Conventional one-point statistics do not allow any analysis across scales.