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CFD의 불확실성 해석에 대한 고찰 및 소스 공개코드를 이용한 선박저항성능에의 적용

A Study on CFD Uncertainty Analysis and its Application to Ship Resistance Performance Using Open Source Libraries

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주제분류조선공학

초록

In the present paper, Computational fluid dynamics (CFD) uncertainty analysis proposed by ITTC was investigated and applied to ship resistance performance using open source libraries, called OpenFOAM. Uncertainties for grid size, time step and iteration number were studied. Wave patterns and hull wave profile were compared for various uncertainty parameters. From results, grid size uncertainty was mainly contributed to simulation numerical uncertainty.

Abstract

In the present paper, Computational fluid dynamics (CFD) uncertainty analysis proposed by ITTC was investigated and applied to ship resistance performance using open source libraries, called OpenFOAM. Uncertainties for grid size, time step and iteration number were studied. Wave patterns and hull wave profile were compared for various uncertainty parameters. From results, grid size uncertainty was mainly contributed to simulation numerical uncertainty.

참고문헌 (11)

  1. Celik, I.B., "Procedure for Estimation and Reporting of Uncertainty Due to Discretization in CFD Applications", Journal of Fluids Engineering, 130(7), pp.078001~ (2008)
  2. 최정은, "와류생성기를 부착한 선박의 속도성능에 대한 수치적 추정", 대한조선학회 논문집, 46(2), pp.136~147 (2009), 대한조선학회
  3. Coleman, H.W., "Uncertainties and CFD Code Validation", Journal of Fluids Engineering, 119(4), pp.795~803 (1997)
  4. "ITTC – Quality Manual 7.5-03-01–01, 2008. CFD General. Uncertainty Analysis in CFD verification and Validation Methodology and Procedures", ITTC Recommended Procedures and Guidelines, ~ (2008)
  5. Kim, W.J., "Measurement of Flows Around Modern Commercial Ship Models", Experiments in Fluids, 31, pp.567~578 (2001)
  6. Lee, J.H., "The investigation of uncertainty for the CFD result validation", Proceeding of the Korean Society for Computational Fluids Engineering Spring Conference, pp.79~83 (2008)
  7. Menter, F. R., "Zonal two equation k-w turbulence models for aerodynamic flows", Proceedings of the 24th Fluid Dynamics Conference, pp.93~2906 (1993), AIAA
  8. 박선호, "Investigation on the wall function implementation for the prediction of ship resistance", International Journal of Naval Architecture and Ocean Engineering, 5(1), pp.33~46 (2013), 대한조선학회
  9. Stern, F., "Comprehensive Approach to Verification and Validation of CFD Simulations-Part 1:Methodology and Procedures", Journal of Fluids Engineering, 123(4), pp.793~802 (2001)
  10. vanLeer, B., "Towards the Ultimate Conservative Difference Scheme", Journal of Computational Physics, 32(1), pp.101~136 (1979)
  11. Wilson, R.V., "Comprehensive Approach to Verification and Validation of CFD Simulations-Part 2: Application for Rans Simulation of a Cargo", Container Ship, 2001, pp.123(4), 803~810

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