세미나 및 이벤트
Development of AUSM-family Schemes
세미나 날짜
2003-10-31
작성자
정기훈
작성일
2003-10-31
조회
1358
1. 제 목 : Ⅰ. Development of AUSM-family Schemes,
Ⅱ. Development of 3D DRAGON Grid Method
for Complex Geometry
2. 연 사 : Dr. Meng-Sing Liou (NASA Glenn Research Center )
3. 일 시 : 2003년 10월 30일 (목) 16:00 - 18:00
4. 장 소 : 서울대 신공학관(301동) 117호 세미나실
5. 내 용 :
1. The approximation of inviscid flux plays a crucial role in achieving accuracy and robustness of a numerical solution in CFD. Since 1980s, various upwind schemes have been introduced and have become a predominant approach now. In this presentation, we will first describe the motivation for which the AUSM scheme started in view of approximate Riemann solvers. And then, we will focus on two extensions of AUSM scheme, namely the low Mach number regime, and multiphase flows and show the recent development of the AUSM schemes in this regard. Moreover, applications of the schemes for realistic engineering problems will be given to demonstrate the reliability of the schemes.
2. In the analysis of complex geometry, choice of grid methodologies is very important to satisfy fast turnaround and accurate and reliable solution. Currently overset grid and unstructured grid schemes are the two mainstream approaches to deal with complicated geometries. However, each method has its own strengths and weaknesses. Hence, we propose a method to properly combine both structured and unstructured grids in order to maximize their respective strengths. In our approach, called DRAGON grid, structured meshes occupy a major portion of the domain and as a result, DRAGON grid preserves strengths of the overset grid, eliminates difficulties such as orphan points in the overset scheme, and enables grid communication in a fully conservative and consistent manner.
6. 약 력 :
B.S. : 1969, National Cheng Kung University, Taiwan (Mechanical Engineering )
M.S. : 1972, National Taiwan University, Taiwan (Mechanical Engineering )
1975, The University of Michigan, Ann Arbor, MI (Aerospace Engineering)
Ph.D. : 1977, The University of Michigan, Ann Arbor, MI (Aerospace Engineering)
1977-1978, The University of Michigan, Ann Arbor, MI (Research Investigator)
1978-1981, McDonnell Douglas Research Labs, St. Louis, MO(Research Scientist)
1981-1984, National Cheng Kung University, Taiwan (Professor and Chairman)
1984-1986, The University of Michigan, Ann Arbor, MI (Visiting Associate Professor)
1986-present, NASA Glenn Research Center, Cleveland, OH( Senior Scientist)
7. 문 의 : 기계항공공학부 김종암 교수 (☏ 880-1915)
Ⅱ. Development of 3D DRAGON Grid Method
for Complex Geometry
2. 연 사 : Dr. Meng-Sing Liou (NASA Glenn Research Center )
3. 일 시 : 2003년 10월 30일 (목) 16:00 - 18:00
4. 장 소 : 서울대 신공학관(301동) 117호 세미나실
5. 내 용 :
1. The approximation of inviscid flux plays a crucial role in achieving accuracy and robustness of a numerical solution in CFD. Since 1980s, various upwind schemes have been introduced and have become a predominant approach now. In this presentation, we will first describe the motivation for which the AUSM scheme started in view of approximate Riemann solvers. And then, we will focus on two extensions of AUSM scheme, namely the low Mach number regime, and multiphase flows and show the recent development of the AUSM schemes in this regard. Moreover, applications of the schemes for realistic engineering problems will be given to demonstrate the reliability of the schemes.
2. In the analysis of complex geometry, choice of grid methodologies is very important to satisfy fast turnaround and accurate and reliable solution. Currently overset grid and unstructured grid schemes are the two mainstream approaches to deal with complicated geometries. However, each method has its own strengths and weaknesses. Hence, we propose a method to properly combine both structured and unstructured grids in order to maximize their respective strengths. In our approach, called DRAGON grid, structured meshes occupy a major portion of the domain and as a result, DRAGON grid preserves strengths of the overset grid, eliminates difficulties such as orphan points in the overset scheme, and enables grid communication in a fully conservative and consistent manner.
6. 약 력 :
B.S. : 1969, National Cheng Kung University, Taiwan (Mechanical Engineering )
M.S. : 1972, National Taiwan University, Taiwan (Mechanical Engineering )
1975, The University of Michigan, Ann Arbor, MI (Aerospace Engineering)
Ph.D. : 1977, The University of Michigan, Ann Arbor, MI (Aerospace Engineering)
1977-1978, The University of Michigan, Ann Arbor, MI (Research Investigator)
1978-1981, McDonnell Douglas Research Labs, St. Louis, MO(Research Scientist)
1981-1984, National Cheng Kung University, Taiwan (Professor and Chairman)
1984-1986, The University of Michigan, Ann Arbor, MI (Visiting Associate Professor)
1986-present, NASA Glenn Research Center, Cleveland, OH( Senior Scientist)
7. 문 의 : 기계항공공학부 김종암 교수 (☏ 880-1915)
