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Efficient slice-based ocean simulation with fluid-solid coupling mechanicsHuang, Yen-Cheng 05 September 2011 (has links)
We present a slice-based method that combined with fluid-solid interaction to render the oceans interact with the objects of the simulation. First, according to the key slices selection one can determine the initial slices simulation for reducing the computation on the number of grid and expressing the solid appearance. Second, we used 3D vector Navier-Stokes equations and combined with 3D fluid-solid coupling to comply with the laws of physics for 2D slice simulation. Third, using a volume of fluid method one can reconstruct the 2D ocean surface and further apply interpolation to extended 2D surfaces to 3D ocean surface. Finally, using the Doo-Sabin subdivision surfaces method is to be smoother for the 3D surface. From the viewpoint of ocean simulation, we can not only solve the fluid-solid coupling problem of objects floating on the sea but also achieve better result in efficiency compared with traditional ocean simulation. From the viewpoint of fluid-solid coupling, the proposed method can greatly reduce the computation in number of grid and be applied to embedded systems, games or films effectively.
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Design and Scale Model of Wave Generator for the Testing of Wave Energy Conversion DevicesOlla, Amanda 01 November 2023 (has links) (PDF)
As the climate crisis draws more concern, research and development in wave energy as a renewable energy source has increased. Devices such as wave energy converters (WECs) are being researched, tested, and implemented to make wave energy a competitive power source. Testing of these devices is limited due to environmental concerns such as weather, location, and other issues. WECs require testing in a marine environment, however, performing testing in the actual environment may be difficult due to weather, access, mounting, and other issues. To eliminate environmental unknowns from testing, a wave simulator device can mimic wave behavior without the need for ocean or river testing. After doing research on wave energy and existing solutions, a wave generator device was conceptualized, designed, and manufactured to be used in Cal Poly’s Fluids Lab. The manufacturing portion was limited by time and funding to a small-scale model of the design which was tested and evaluated as the full-scale model would be. The design concept is a device that moves vertically on the back wall of a tank filled with water where the up and down motion will cause waves to form. The vertical motion is achieved by the device being pushed down and pulled up with a crank slider driven by a motor. The rotational motion produced by the motor is translated to linear motion by the crank slider mechanism. The device is restricted to the vertical motion with linear guide rails and attached to the tank with a structural frame. The scale model replicates this design and its components on a small-scale and is used as a proof-of-concept prototype. Its purpose is to validate the design concept and objective of simulating ocean waves. The validated design concept, proven by the scale design, will be manufactured at full-scale by future Senior Design Project teams at Cal Poly. The wave simulator device will be utilized by Cal Poly students, faculty, or affiliates to test different types of WECs.
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