Investigation of a space-time adaptive method for bluff body flows
Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2016.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2017
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| Online Access: | http://hdl.handle.net/1721.1/107018 |
| _version_ | 1826196972932956160 |
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| author | Hu, Yixuan, S.M. Massachusetts Institute of Technology |
| author2 | David L. Darmofal. |
| author_facet | David L. Darmofal. Hu, Yixuan, S.M. Massachusetts Institute of Technology |
| author_sort | Hu, Yixuan, S.M. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2016. |
| first_indexed | 2024-09-23T10:40:28Z |
| format | Thesis |
| id | mit-1721.1/107018 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T10:40:28Z |
| publishDate | 2017 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1070182019-04-10T21:23:45Z Investigation of a space-time adaptive method for bluff body flows Hu, Yixuan, S.M. Massachusetts Institute of Technology David L. Darmofal. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics. Aeronautics and Astronautics. Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2016. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Cataloged from student-submitted PDF version of thesis. Includes bibliographical references (pages 113-125). The problem of large computational costs for achieving high accuracy uid dynamics simulations remains challenging. This thesis investigates an unstructured spacetime adaptive framework for unsteady ow simulations of the compressible Navier-Stokes equations. A fully-unstructured discretization of space and time is used: for d-dimensional spatial problems, (d + 1)-dimensional meshes are generated, where time is treated as an additional dimension. A high-order discontinuous Galerkin discretization is combined with an output-based anisotropic mesh adaptation framework for numerical approximations on simplex meshes with arbitrary orientation and anisotropy. This framework has been applied to study (2 + 1)d unsteady flows around a single circular cylinder and two cylinders in tandem arrangements at Re = 100. High-order solutions with sucient degrees of freedom are able to capture ow unsteadiness, shown as a von Karman vortex street formed behind the cylinders. The adapted results are compared with time-marching solutions to determine the eciency and reliability of this method. by Yixuan Hu. S.M. 2017-02-22T15:59:13Z 2017-02-22T15:59:13Z 2016 2016 Thesis http://hdl.handle.net/1721.1/107018 971022007 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 125 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Aeronautics and Astronautics. Hu, Yixuan, S.M. Massachusetts Institute of Technology Investigation of a space-time adaptive method for bluff body flows |
| title | Investigation of a space-time adaptive method for bluff body flows |
| title_full | Investigation of a space-time adaptive method for bluff body flows |
| title_fullStr | Investigation of a space-time adaptive method for bluff body flows |
| title_full_unstemmed | Investigation of a space-time adaptive method for bluff body flows |
| title_short | Investigation of a space-time adaptive method for bluff body flows |
| title_sort | investigation of a space time adaptive method for bluff body flows |
| topic | Aeronautics and Astronautics. |
| url | http://hdl.handle.net/1721.1/107018 |
| work_keys_str_mv | AT huyixuansmmassachusettsinstituteoftechnology investigationofaspacetimeadaptivemethodforbluffbodyflows |