CFD Predictions of Drag Force for a Slocum Ocean Glider

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TypeTechnical Report
Series titleTechnical Report; no. TR-2010-07
Physical description44p.
SubjectComputational Fluid Dynamics; CFD; Ocean Glider; Turbulence models; ANSYS-CFX; ANSYS-FLUENT
AbstractPreceding the installation of a hydro-acoustic monitoring system on an ocean glider, CFD (Computational Fluid Dynamics) tools can be used to assess the impact on the hydrodynamic properties of the glider when the hull is modified because of adding new sensors. In this study, two simple questions are examined. The first one is which CFD code can predict more accurately the drag force of the ocean glider. The second is which turbulence model is appropriate for estimating the drag force at the glide speed of the ocean glider. The CFD results are compared with the results from the drag measurements and self-propulsion experiments which were conducted at the Marine Institute's Flume Tank with a Slocum glider in October and November 2009. Starting from the comparison with the experiments, the comparative study is performed with the help of graphical results such as velocity profiles, pressure contours and wall shear stress distributions. Finally, an analysis is presented for why there are differences between the experimental and predicted values of the drag force according to the two CFD codes and turbulence models which were used.
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AffiliationNational Research Council Canada; NRC Institute for Ocean Technology
Peer reviewedNo
NPARC number17210700
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Record identifier02941fdf-ce99-4444-87aa-b07719f3f8a4
Record created2011-03-22
Record modified2016-10-03
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