NDLI: Comparison of Single and Overset Grid Techniques for CFD Simulations of a Surface Effect Ship

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Comparison of Single and Overset Grid Techniques for CFD Simulations of a Surface Effect Ship

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Colton, G. Clark David, G. Lyons Wayne, L. Neu
Copyright Year	2014
Abstract	Overset, or Chimera meshes are used to discretize the governing equations within a computational domain using multiple meshes that overlap in an arbitrary manner. The overset mesh technique is most applicable to problems dealing with multiple or moving bodies. In order to extend existing full craft CFD (RANS) simulations of a surface effect ship (SES) into shallow water and maneuvering cases, an overset mesh is needed. Deep water simulations were carried out using both single and overset grid techniques for evaluation of the overset grid application. The single grid technique applies a hexahedral mesh to the fluid domain and SES geometry. An adequate mesh resolution was determined by performing a grid convergence study on a series of systematically refined meshes. An overset mesh of the same resolution was then constructed and was fixed to the body. Drag and pitch results are compared among the two simulations. Free surface elevations around the craft and under the air cushion for simulations with the single and overset meshes are compared. Steady-state simulations using the overset mesh and the single mesh show general similarities in drag, pitch, and free surface elevations.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
File Format	PDF
ISBN	9780791845400
DOI	10.1115/OMAE2014-24207
Volume Number	Volume 2: CFD and VIV
Conference Proceedings	ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2014-06-08
Publisher Place	San Francisco, California, USA
Access Restriction	Subscribed
Subject Keyword	Water Geometry Fluids Computational fluid dynamics Simulation Ships Reynolds-averaged navier–stokes equations Engineering simulation Drag (fluid dynamics) Resolution (optics) Steady state Elevations (drawings)
Content Type	Text
Resource Type	Article

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