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Numerical simulation of cavity flow by using conforming and nonconforming finite elements : 순응 및 비순응 유한요소를 이용한 공동 구조에서의 유체 유동 수치 해석

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Authors

임록택

Advisor
신동우
Major
자연과학대학 협동과정 계산과학전공
Issue Date
2014-08
Publisher
서울대학교 대학원
Keywords
conforming finite element methodnonconforming finite element methodstable nonconforming P1-P0 pairDSSY finite elementthe incompressible Navier-Stokes equationslid driven cavity problem
Description
학위논문 (박사)-- 서울대학교 대학원 : 협동과정 계산과학전공, 2014. 8. 신동우.
Abstract
This thesis presents a numerical method for solving the incompressible flow in a square cavity without smoothing the corner singularities. Since nonconforming finite element method can avoid vertex degree of freedom, the values at the upper corners of the cavity are not required to solve the problem. By taking this advantage it is possible to compute accurate numerical solution of the cavity flow without any modification of the problem. The stable nonconforming P1-P0 pair used to solve the incompressible flow problem. DSSY finite elements are added to elements which are on the top corners in the cavity to obtain a more accurate approximation of the boundary condition. Numerical solutions by using conforming finite element are computed for the purposes of comparison. The numerical results are compared with those in the literature and show good agreement. Numerical results computed by using the stable nonconforming P1-P0 pair show excellent accuracy.
Language
English
URI
https://hdl.handle.net/10371/125439
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