UMass Amherst leads research on how to turn damaging force to helpful new uses
One of the least-studied factors in traumatic brain damage and other soft-tissue injuries is the focus of a new, four-year, $2.6 million grant from the Office of Naval Research. A team led by polymer scientist Alfred Crosby at the University of Massachusetts Amherst, with others at the University of Pennsylvania and the University of California, San Diego, will study cavitation, the sudden expansion of bubbles in a material.
As Crosby explains, the creation and collapse of bubbles in liquids is well known and has been studied extensively for the past century. When cavitation bubbles collapse, they force liquid into a smaller area, causing a pressure wave and increased temperature. In a pump, for example, cavitation can cause wear and erode metal parts over time. Cavitation inside artificial heart valves can damage not only the parts but the blood. Microcavitation in the brain as a result of high-impact blows or being near an explosion is suspected as a factor in brain injury.
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