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.
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ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
June 8–13, 2014
San Francisco, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4540-0
PROCEEDINGS PAPER
Comparison of Single and Overset Grid Techniques for CFD Simulations of a Surface Effect Ship
Colton G. Clark,
Colton G. Clark
Virginia Tech, Blacksburg, VA
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David G. Lyons,
David G. Lyons
Virginia Tech, Blacksburg, VA
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Wayne L. Neu
Wayne L. Neu
Virginia Tech, Blacksburg, VA
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Colton G. Clark
Virginia Tech, Blacksburg, VA
David G. Lyons
Virginia Tech, Blacksburg, VA
Wayne L. Neu
Virginia Tech, Blacksburg, VA
Paper No:
OMAE2014-24207, V002T08A068; 7 pages
Published Online:
October 1, 2014
Citation
Clark, CG, Lyons, DG, & Neu, WL. "Comparison of Single and Overset Grid Techniques for CFD Simulations of a Surface Effect Ship." Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: CFD and VIV. San Francisco, California, USA. June 8–13, 2014. V002T08A068. ASME. https://doi.org/10.1115/OMAE2014-24207
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