Researchers from IIT-K reveal process of turbulent binary fluids

Kanpur: Researchers from the Indian Institute of Technology Kanpur (IIT-K) have unveiled new insights into the process of relaxation of turbulent binary fluids

The new study has been published in the journal 'Communications Physics' by Nature Group.

This significant research on binary fluids, referring to a mixture such as oil and water, challenges existing theories of turbulent relaxation and opens new avenues in the practical application of binary fluid dynamics in science, engineering and various industries.

According to an official release, upon vigorous stirring, a binary fluid becomes turbulent and forms an intermediate phase with cell-like structures.

The current study, led by Prof. Supratik Banerjee, along with research scholars Nandita Pan and Arijit Halder from the Department of Physics, IIT Kanpur, explores the detailed process how such a binary fluid relaxes when the stirring is withdrawn.

This discovery by the IIT Kanpur team has profound implications for understanding and manipulating the properties of such fluids in industrial applications.

In particular, the research offers a quantitative analysis of how the bulk of each component fluid and their interface in a binary mixture relax back to a phase-separated state once the turbulence ceases.

Interestingly, the relaxed state of the bulk turns up to be categorically different than that of the interface region.

However, both relax through a universal pathway, namely the principle of vanishing nonlinear transfers (PVNLT) proposed by the same authors very recently.

Furthermore, this relaxation process in binary fluids, as per the findings of the study, significantly differs from that in single-fluid systems. This distinction can be attributed to the conservation of an additional quantity called the 'scalar energy', which is pivotal in understanding this relaxation process.