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Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25
Date:11/19/2008

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In his talk at the 61st Annual Meeting of the APS Division of Fluid Dynamics in San Antonio, Arnold Song, who is one member of this group, will describe the basic motions -- and their aerodynamic implications -- that he and his colleagues at Brown have discovered so far by measuring how paddles and stretched ribbons of sailcloth vibrate in manmade breezes in a wind tunnel. As the airflow increases, for example, a paddle on a post first twists and then flaps, like a stop sign being pummeled by hurricane-force winds. The ribbon's behavior is more complicated, but also essential for understanding how bat wings or other compliant structures generate lift so efficiently.

Song's talk, "On Vortex Induced Motion in Compliant Structures," will be held at 10:30 a.m. on Sunday, November 23, 2008, in Room 204B of the San Antonio Convention Center. Abstract: http://meetings.aps.org/Meeting/DFD08/Event/89974.

6) MODELING EMBRYONIC HEART DEVELOPMENT

Congenital heart diseases affect one percent of newborn babies and babies who are lost in the prenatal period, and the malformation of the circulatory system is responsible for 10 percent of stillbirths.

To give scientists new insight into the developing heart, math biologist Laura Miller, an assistant professor of mathematics at the University of North Carolina, along with mechanical engineer Arvind Santhanakrishnan and graduate student Anil Shenoy, constructed several dynamically scaled models of the embryonic heart within rigid plexiglass walls. The models represent the morphologies of different stages in heart development, and provide insight into the flow within the developing heart. Corresponding numerical simulations by Miller couple the electrophysiology to the flow patterns within a beating heart.

These physical and numerical models will help scientists gain a better understanding of the relati
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Contact: Jason Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

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