• Title/Summary/Keyword: Steger-Warming

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Analytical Solution for Hypersonic Flow on Blunt Bodies (뭉뚝한 물체 주변에 형성된 극초음속유동해석)

  • Baik Doo Sung
    • Journal of computational fluids engineering
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    • v.8 no.4
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    • pp.1-5
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    • 2003
  • A Thin-layer Wavier-Stokes equations are applied for the hypersonic flow over blunt bodies with applications to laminar as well as turbulent flows. The equations are expressed in the forms of flux-vector splitting and explicit algorithm. The upwind schemes of Steger-Warming and Van Leer are investigated to predict accurately the heating loads along the surface of the body. A mixed scheme has been presented for the differencing the convective terms and the mixed scheme is found to be less dissipative producing accurate solutions.

Computational Fluid Dynamics Applied to Hypersonic Blunt Body Flows (Hypersonic 뭉뚝 물체 흐름에 적용된 CFD)

  • Baik, Doo-Sung;Han, Young-Chaol;Ha, Young-Min;Kim, Duk-Sang
    • Proceedings of the KSME Conference
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    • 2001.06e
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    • pp.311-316
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    • 2001
  • The thin-layer Navier-Stokes equations are solved for the hypersonic flow over blunt cone configurations with applications to laminar as well as turbulent flows. The equations are expressed in the forms of flux-vector splitting and explicit algorithm. The upwind schemes of Steger-Warming and van Leer are investigated in their ability to accurately predict the heating loads along the surface of the body. A comparison with the second order extensions of these schemes is made and a hybrid scheme incorporating a combination of central differencing and flux-vector-splitting is presented. This scheme is also investigated in its ability to accurately predict heat transfer distributions.

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Numerical analysis of a flow field in gas atomization process using a TVD scheme (TVD기법을 이용한 가스 분무 공정의 유동장 해석)

  • Shim Eun Bo
    • 한국전산유체공학회:학술대회논문집
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    • 1996.05a
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    • pp.131-136
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    • 1996
  • The numerical method for the flow field of a gas atomization process is presented. For the analysis of the compressible supersonic jet flow of a gas. an axisymmetric Navier-Stokes equations are solved using a LU-factored upwind method. The MUSCL type TVD scheme is used for the discretization of inviscid flux, whereas Steger-Warming splitting and LU factorization is applied to the implicit operator. For the validation of the present method, we computed the flow field around the simple gas atomizer proposed by Issac. The numerical results has shown excellent agreement with the experimental data.

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COMPARATIVE STUDY ON FLUX FUNCTIONS AND LIMITERS FOR THE EULER EQUATIONS (Euler 방정식의 유량함수(Flux Function)와 제한자(Limiter) 특성 비교 연구)

  • Chae, E.J.;Lee, S.
    • Journal of computational fluids engineering
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    • v.12 no.1
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    • pp.43-52
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    • 2007
  • A comparative study on flux functions for the 2-dimensional Euler equations has been conducted. Explicit 4-stage Runge-Kutta method is used to integrate the equations. Flux functions used in the study are Steger-Warming's, van Leer's, Godunov's, Osher's(physical order and natural order), Roe's, HLLE, AUSM, AUSM+, AUSMPW+ and M-AUSMPW+. The performance of MUSCL limiters and MLP limiters in conjunction with flux functions are compared extensively for steady and unsteady problems.

Navier-Stokes Computations for Hypersonic flow on Blunt Bodies (뭉뚝물체 주변에 형성된 극초음속유동에 대한 Navier-Stokes 계산)

  • Baik Doo S.;Kim Duk S.
    • 한국전산유체공학회:학술대회논문집
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    • 2001.10a
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    • pp.91-97
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    • 2001
  • The thin-layer Navier-Stokes equations are solved for the hypersonic flow over blunt cone configurations with applications to laminar as well as turbulent flows. The equations are expressed in the forms of flux-vector splitting and explicit algorithm. The upwind schemes of Steger-Warming and van Leer are investigated in their ability to accurately predict the heating loads along the surface of the body. A comparison with the second order extensions of these schemes is made and a hybrid scheme incorporating a combination of central differencing and flux-vector-splitting is presented. This scheme is also investigated in its ability to accurately predict heat transfer distributions.

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STUDY ON FLUX FUNCTIONS FOR THE EULER EQUATIONS (Euler 방정식의 Flux Function 특성 비교 연구)

  • Chae, E.J.;Lee, S.
    • 한국전산유체공학회:학술대회논문집
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    • 2006.10a
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    • pp.36-40
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    • 2006
  • A comparative study on flux functions for the 2-dimensional Euler equations has been conducted. Explicit 4-stage Runge-Kutta method is used to integrate the equations. Flux functions used in the study are Steger-Warming's, van Leer's. Godunov's, Osher's(physical order and natural order), Roe's, HILE, AUSM, AUSM+ and AUSMPW+. The performance of MUSCL limiters and MLP limiters in conjunction with flux functions are compared extensively for steady and unsteady problems.

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Computational Study on Turbulent Viscous flow around RAE 'A' Wing Axi-Symmetric Body Configuration ( 비행체 형상에 대한 천음속 점성 유동의 수치적 연구)

  • Im Y. H.;Chang K. S.;Jeong H. K.;Kwon J. H.;Park M. W.
    • 한국전산유체공학회:학술대회논문집
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    • 1997.10a
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    • pp.81-85
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    • 1997
  • The Computer code KAIST-ADD LUFUNS has been developed to solve 3D compressible turbluent flow. This method employs Harten-Yee's modified upwind scheme in the explicit part and Steger-Warming Splitting in the implicit part. Flow past RAE wing-body aircraft has been computed for three different flow conditions. The result have shown good comparision with the experimental data. Baldwin-Lomax turbluence model is used for this computer code.

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