Journal of Marine Biology & Oceanography ISSN: 2324-8661

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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: [email protected]
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.

Keywords: Climate change; Ocean heating; Drag forces; Entry forces; Water entry; Ocean temperatures; Climate monitoring

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