Hydrodynamic assessment of planing hulls using overset grids |
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| Institution: | 1. Department of Mechanical Engineering, Universitat Rovira i Virgili (URV), 43007 Tarragona, Spain;2. Division of Engineering and Applied Science, California Institute of Technology, CA 91125, Pasadena, USA.;1. Ghent University, Department of Civil Engineering, Technologiepark 904, 9052 Ghent, Belgium;2. KU Leuven, Department of Civil Engineering, Technology Cluster Construction, Zeedijk 101, 8400 Ostend, Belgium;1. Department of Mechanical Engineering, Babol Noshiravani University of Technology, Babol, Iran;2. Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA |
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| Abstract: | In conjunction with high performance computers, recent developments in computational science paved the path to more accurate representation of body motions inside fluids. Small motions inside the flow can be computationally approximated by using rigid body motion but it is incapable of accurately predicting the large motions of a planing vessel. The implementation of overset grid has made it possible to better approximate the complex fluid-structure interaction problem of the planing regime. The focus of this study was to evaluate the opportunity of using an overset grid system to numerically solve the flow around a planing hull and to understand the planing regime with this invaluable tool. It was shown in this study that the overset grid better captures the large motions of the planing hull at high Froude numbers. Then, the results obtained by overset grid were used to calculate the resistance components of a planing hull in a wide Froude number range. The resistance components were discussed with respect to values generated by Savitsky approach. Using the benefits that the computational science brings, the flow was visualized to explain some underlying physics relevant to the planing regime. |
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| Keywords: | Planing hull Overset grid Savitsky Ship resistance Squat Hydrodynamic lift URANS |
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