Factors affecting turbulence scaling (Vol. 50, No. 1)

Stability regions calculated by a model for a given compressibility

Study focuses on hydrodynamic effects of external disturbances on fluids at critical points, including inconsistent turbulence in all directions, or anisotropy, and varying degrees of compressibility

Fluids exhibiting scaling behaviour can be found in diverse physical phenomena occurring both in the laboratory and in real-world conditions. For instance, they occur at the critical point when a liquid becomes a vapour, at the phase transition of superfluids, and at the phase separation of binary liquids whose components exhibit two different types of behaviour. Until now, models have not fully taken the effect of external turbulences into account. In a recent study published recently, the authors investigate the influence of ambient turbulent speed fluctuations in physical systems when they reach a critical point. These fluctuations are found to be the result of a lack of spatial regularity in these systems, or anisotropy, and of the compressibility of fluids. What is unique about this study is that the turbulence introduced in the model is novel and helps to elucidate the extent to which the speed of these fluctuations affects their scaling behaviour.

M. Hnatič, G. Kalagov, and T. Lučivjanský, Scaling behavior in interacting systems: joint effect of anisotropy and compressibility, Eur. Phys. J. B, 91, 269 (2018)
[Abstract]