Performance analyses of newton method for multi-block structured grids

Date

2011

Author

Ayan, Erdem

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In order to make use of Newton’s method for complex flow domains, an Euler multi-block Newton solver is developed. The generated Newton solver uses Analytical Jacobian derivation technique to construct the Jacobian matrices with different flux discretization schemes up to the second order face interpolations. Constructed sparse matrices are solved by parallel and series matrix solvers. In order to use structured grids for complex domains, multi-block grid construction is needed. Each block has its own Jacobian matrices and during the iterations the communication between the blocks should be performed. Required communication is performed with “halo” nodes. Increase in the number of grids requires parallelization to minimize the solution time. Parallelization of the analyses is performed by using matrix solvers having parallelization capability. In this thesis, some applications of the multi-block Newton method to different problems are given. Results are compared by using different flux discretization schemes. Convergence, analysis time and matrix solver performances are examined for different number of blocks.

Subject Keywords

Engineering Design.

URI

http://etd.lib.metu.edu.tr/upload/12613704/index.pdf
https://hdl.handle.net/11511/21041

Collections

Graduate School of Natural and Applied Sciences, Thesis