Scientists Find a Way to Reverse Energy Transfer in Turbulence

New Insights into Energy Flow in Turbulent Systems

According to НВ — Техно: Led by Associate Professor Lei Fang, a research team has uncovered fresh findings on how energy moves within turbulent flows. By applying the Navier-Stokes equations and tensor analysis, they demonstrated that the direction of energy transfer can be altered-enabling both forward and backward energy cascades in turbulent streams. These discoveries hold promise for applications in pollution control, microfluidic devices, and climate modeling.

Published on June 4 at 1:00 PM, the study builds on the foundational work of mathematician and physicist Andrey Kolmogorov. Since 1941, Kolmogorov’s theories maintained that in three-dimensional environments, energy invariably flows from larger structures to smaller ones. Fang’s team, however, developed a novel model applicable to three-dimensional systems. They conducted laboratory experiments using a thin layer of water subjected to electromagnetic forces. A horizontal magnetic field generated a two-dimensional flow, while a custom array of rods introduced disturbances.

Experimental Findings

The experimental results validated the theoretical framework, matching computer simulations closely. The researchers observed that small physical barriers-up to 10 meters in size-could potentially influence vast oceanic transport barriers spanning kilometers. These insights could prove especially valuable in microfluidics, where liquids move through channels less than 1 millimeter wide.

“We viewed energy transfer as a mechanical process”

- Associate Professor Lei Fang

These findings open new horizons in the understanding of turbulence and energy transfer, with significant implications across multiple scientific and industrial fields. In particular, their application to pollution control and microfluidic systems could lead to new technologies that enhance efficiency in these areas. The research also underscores the importance of theoretical foundations in developing practical solutions for modern environmental and technological challenges.

This work was reported by ScienceDaily.

The recent breakthroughs in understanding energy transfer within turbulent flows echo similar advancements in other scientific fields. For instance, researchers have recently unraveled a long-standing mystery regarding the emergence of giant magnetic fields in cosmic environments. These findings illustrate how chaotic systems can lead to structured phenomena, much like the energy dynamics explored by Fang's team. To learn more about this fascinating development, visit the resolution of a 70-year-old cosmic enigma.