Before revision:  We here perform an energy stability analysis of turbulent incompressible flow, which suggests a scenario where  any exponentially unstable irrotational  flow structures rapidly evolve towards linearly unstable shear flow and stable rigid body rotational flow , which dissipates to heat .
After revision:  We here perform an energy stability analysis of turbulent incompressible flow, which suggests a scenario where at macroscopic scales any exponentially unstable irrotational flow structures rapidly evolve towards linearly unstable shear flow and stable rigid body rotational flow , which dissipates to heat .