Topic: Physics

Researchers at the University of Pittsburgh found that they can change the direction of energy flow in ocean waves. This discovery could help with coastal management and climate science.

Turbulence in oceans and rivers can seem like chaos, with powerful currents twisting and churning. For decades, scientists thought that energy flowed from larger structures to smaller ones. But new research suggests this rule may not be fixed after all.

Lei Fang, an assistant professor at the University of Pittsburgh's Swanson School of Engineering, led a team of researchers who discovered they can alter the direction of energy flow in turbulence. This breakthrough could have implications for medicine, coastal management, and climate science.

Fang approached the problem by recasting the energy flux process into a mechanical process based on Navier-Stokes equations. He used tensors, mathematical objects that describe quantities like stress and deformation, to develop a geometric framework. This framework showed that the direction of energy transfer depends on how these tensors interact.

The researchers found that under certain conditions, the flow of energy can be redirected rather than following its traditionally expected path. They conducted laboratory experiments using a thin layer of water driven by electromagnetic forces and an array of rods to disturb it. The results matched computer simulations and supported their predictions.

This discovery could eventually provide practical benefits in various fields. For example, it may help improve how wastewater or other contaminants are dispersed along a coastline.

Why It Matters

This breakthrough has the potential to improve our understanding of ocean waves and currents, which is crucial for coastal management and climate science. It also highlights the importance of interdisciplinary research that combines concepts from mathematics, engineering, and physics.

Key Facts

• Researchers at the University of Pittsburgh discovered they can change the direction of energy flow in turbulence.
• The discovery could have implications for medicine, coastal management, and climate science.
• Lei Fang led a team of researchers who developed a geometric framework to manipulate energy flux direction.
• The framework relies on tensors, mathematical objects that describe quantities like stress and deformation.
• Laboratory experiments supported the predictions of the new framework.

Key Terms

Turbulence

A chaotic motion of fluids or gases

Implications

This breakthrough has the potential to improve our understanding of ocean waves and currents, which is crucial for coastal management and climate science. It also highlights the importance of interdisciplinary research that combines concepts from mathematics, engineering, and physics.