Research Article, J Mar Biol Oceanogr Vol: 3 Issue: 2
Experimental Verification of Drag Forces on Spherical Objects Entering Water
| John Gorman1, John Abraham2*, Dillon Schwalbach2, Thomas Shepard2, John Stark2 and Franco Reseghetti3 | |
| 1Department of Mechanical Engineering, University of Minnesota, Minneapolis, USA | |
| 2School of Engineering, University of St. Thomas, St. Paul, USA | |
| 3ENEA, UTMAR-OSS, Forte S. Teresa, Italy | |
| Corresponding author : John Abraham School of Engineering, University of St. Thomas, 2115 summit Ave, St. Paul, MN 55105-1079, USA Tel: 651-962-5766; Fax: 651-962-6419 E-mail: jpabraham@stthomas.edu |
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| Received: November 11, 2013 Accepted: January 24, 2014 Published: February 05, 2014 | |
| Citation: Gorman J, Abraham J, Schwalbach D, Shepard T, Stark J, et al.,(2014) Experimental Verification of Drag Forces on Spherical Objects Entering Water. J Mar Biol Oceanogr 3:2. doi:10.4172/2324-8661.1000126 |
Abstract
Experimental Verification of Drag Forces on Spherical Objects Entering Water
Objects which pass from gas regions to liquid regions experience elevated impact forces associated with the acceleration of the surrounding liquid. In order to investigate these forces, complementary experiments and simulations were performed on a sphere that traveled from air to water with an impact velocity of 2 m/s. It was found that the two methods gave results that were in very good agreement. In particular, the depth vs. time trajectory of the sphere closely matched. A fitted polynomial allowed the entry region acceleration to be extracted.
