Date of Award:
5-2013
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Mechanical and Aerospace Engineering
Committee Chair(s)
Aaron Katz
Committee
Aaron Katz
Committee
Robert E. Spall
Committee
Heng Ban
Abstract
This thesis focuses on improvements to numerical simulation of fluid dynamic problems. A study of computation fluid dynamics is done to improve simulation accuracy and efficiency. Accurate and fast results are the desire of simulation techniques. Two main improvements to current CFD methods are implemented and tested: a new boundary condition verification procedure and a new preconditioning technique.
First, mathematical code verification methods are extended to also include boundary conditions that can often drive fluid dynamics problems. A new framework is created to implement a variety of desirable boundaries. With this framework, a robust verification procedure for these boundaries is presented. Testing of the new procedure is completed by using exact analytic solutions.
Second, preconditioning of the numeric waves is used to increase computational efficiency and solution accuracy. A new scheme is introduced and tested with old schemes and is shown to have better accuracy characteristics for low speed unsteady flows.
Both boundary conditions and preconditioning algorithms were implemented in the context of a "strand grid" solver. While not the focus of this thesis, strand grids provide automatic viscous quality meshing and are suitable for moving mesh overset problems.
Checksum
310ec2ede0692928d85ceebfa28d939e
Recommended Citation
Folkner, David E., "Improvement in Computational Fluid Dynamics Through Boundary Verification and Preconditioning" (2013). All Graduate Theses and Dissertations, Spring 1920 to Summer 2023. 1738.
https://digitalcommons.usu.edu/etd/1738
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