• Title/Summary/Keyword: Integrated CFD

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Development of Integrated Computational Fluid Dynamics(CFD) Environment using Opensource Code (오픈소스 코드를 이용한 통합 전산유체역학 환경 구축)

  • Kang, Seunghoon;Son, Sungman;Oh, Se-Hong;Park, Wonman;Choi, Choengryul
    • Convergence Security Journal
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    • v.18 no.1
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    • pp.33-42
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    • 2018
  • CFD analysis is an analytical technique that applies a computer to the design and development of products across the entire industry for heat or fluid flow. This technology is used to shorten the development period and reduce costs through computerized simulation. However, the software used for CFD analysis is now required to use expensive foreign software. The Opensource CFD analysis software used in the proposed system has reliability of commercial CFD analysis software and has various user groups. However, for users who have expert knowledge, Opensource CFD software which supports only text interface environment, We have developed an environment that enables the construction of a CFD analysis environment for beginners as well as professionals. In addition, the proposed system supports the pre-processing (design and meshing) environment for CFD analysis and the environment for post-processing (result analysis & visualization), enabling the integrated CFD analysis process in one platform.

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Development of an Integrated S/W for Automated CFD Application (자동화된 CFD 적용을 위한 통합형 S/W의 개발에 관한 연구)

  • Kim Kiyoun;Kim Byoungsoo
    • 한국전산유체공학회:학술대회논문집
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    • 1998.11a
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    • pp.29-35
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    • 1998
  • In this paper, the on-going effort and progress for developing an integrated software for automated CFD application is described. As an outcome of the effort devoted so far, a new system, ICFDIT, is developed and introduced in this paper. The new system can be used to solve fluid dynamics problems in a convenient graphical environment, and it includes a pre-processor, a main-processor, and a post-processor. Usage of the system and examples are demonstrated, and some issues for improvement of the system are discussed.

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DEVELOPMENT OF A HYBRID CFD FRAMEDWORK FOR MULTI-PHENOMENA FLOW ANALYSIS AND DESIGN (다중현상 유동 해석 및 설계를 위한 융복합 프레임웍 개발)

  • Hur, Nahm-Keon
    • 한국전산유체공학회:학술대회논문집
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    • 2010.05a
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    • pp.517-523
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    • 2010
  • Recently, the rapid evolution of computational fluid dynamics (CFD) has enabled its key role in industries and predictive sciences. From diverse research disciplines, however, are there strong needs for integrated analytical tools for multi-phenomena beyond simple flow simulation. Based on the concurrent simulation of multi-dynamics, multi-phenomena beyond simple flow simulation. Based on the concurrent simulation of multi-dynamics, multi-physics and multi-scale phenomena, the multi-phenomena CFD technology enables us to perform the flow simulation for integrated and complex systems. From the multi-phenomena CFD analysis, the high-precision analytical and predictive capacity can enhance the fast development of industrial technologies. It is also expected to further enhance the applicability of the simulation technique to medical and bio technology, new and renewable energy, nanotechnology, and scientific computing, among others.

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Flutter Suppression of a 3-DOF Airfoil Using CFD/CSD with Integrated Optimal Control Method (CFD/CSD 및 최적제어기법을 연계한 3-자유도계 에어포일의 플러터 억제)

  • Kim, Dong-Hyun;Kim, Hyun-Jung
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.11a
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    • pp.929-929
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    • 2005
  • In this study, computational demonstrations for the flutter suppression are presented for the 3-DOF airfoil system with oscillating flap. Advanced computational methods such as computational fluid dynamics (CFD) and computational structural dynamics (CSD) are used and a simultaneous coupling method has been developed to accurately conduct flutter analyses. In addition, optimal control theory is integrated into the CFD based flutter analysis method to construct the coupled aeroservoelastic analysis system for the airfoil with oscillating flap. For a well-defined typical section model, fundamental unsteady aerodynamics and flutter characteristics are investigated. Finally, to show the effectiveness of flutter control the physical aeroelastic responses are directly compared between the open loop and the closed loop systems.

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Virtual Flutter Test of a Spanwise Curved Wing Using CFD/CSD Integrated Coupling Method (CFD/CSD 통합 연계기법을 이용한 횡방향 곡률이 있는 날개의 가상 플러터 시험)

  • Oh, Se-Won;Lee, Jung-Jin;Kim, Dong-Hyun
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.16 no.4 s.109
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    • pp.355-365
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    • 2006
  • The coupled time-integration method with a staggered algorithm based on computational structural dynamics (CSD), finite element method (FEM) and computational fluid dynamics (CFD) has been developed in order to demonstrate physical vibration phenomena due to dynamic aeroelastic excitations. Virtual flutter tests for the spanwise curved ing model have been effectively conducted using the present advanced computational method with high speed parallel processing technique. In addition, the present system can simultaneously give a recorded data file to generate virtual animation for the flutter safety test. The results for virtual flutter test are compared with the experimental data of wind tunnel test. It is shown from the results that the effect of spanwise curvature have a tendency to decrease the flutter dynamic pressure for the same flight condition.

Study of the Fluid Flow on Proportional Valve in Spool Displacement using CFD

  • Li, Kui-Ming;Choi, Yoon-Hwan;Lee, Ill-Yeong;Lee, Yeon-Won
    • Journal of Power System Engineering
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    • v.19 no.2
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    • pp.22-26
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    • 2015
  • The main objective of this work is to estimate the fluid flow of a proportional valve. The study is based on the classical compressible flow theory and the computations with the help of CFD based commercial software - ANSYS CFX. The fluid flow with the movement of spool along the sleeve is simulated. To change the spool moving from 0.4mm to 2.0mm, the moving mesh method with different condition of orifice is considered here. The results show that it is the highest at the 80 % (1.6mm) opening and at the 20 % (0.4mm) opening, is the lowest.

FLUID-STRUCTURE INTERACTION ANALYSIS FOR HIGH ANGLE OF ATTACK MANEUVER MISSILE (고받음각에서 기동하는 미사일의 공력-구조 연계 해석)

  • Noh, K.H.;Park, M.Y.;Park, S.H.;Lee, J.W.;Byun, Y.H.
    • 한국전산유체공학회:학술대회논문집
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    • 2007.10a
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    • pp.111-114
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    • 2007
  • Computational Fluid Dynamics (CFD) and the Finite Element Method (FEM) are used to perform aerodynamics analysis and structure analysis. For the fluid-structure interaction analysis, each technology should be considered as well. The process of aerodynamics-structure coupled analysis can be applied to various integrated analyses from many research fields. In this study, the aerodynamics-structure coupled analysis is performed for the missile at high angle of attack condition through the use of Computational Fluid Dynamics (CFD) and the Finite Element Method (FEM). For this purpose, the aerodynamics-structure coupled analyses procedure for the missile are established. The results of the integrated analysis are compared with rigid geometry of the missile and the effect of the deformation will be addressed.

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Study on Wave Energy Generation of Multi-Floating Bodies for Energy Absorption by CFD

  • Li, Kui-Ming;Choi, Yoon-Hwan;Lee, Yeon-Won
    • Journal of Power System Engineering
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    • v.17 no.5
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    • pp.38-43
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    • 2013
  • In order to design a wave energy generating system, a 6-DOF analysis technique is applied to CFD analysis on of a floating body and the behavior is interpreted according to the nature of the incoming waves. A spring constant is adopted to control the motion of multi floating bodies and to calculate the total average power absorption. Three cases of different wavelengths namely 20D, 30D and 40D have been modeled to analyze the total average power absorption. The average power absorption not only varies with the position of the floating body but also varies with wavelength. From the results obtained, it is concluded that the maximum total average power absorption is 9W approximately in wavelength 30D and the minimum total average power absorption is 4.3W approximately in wavelength 40D.

Integrated CFD on Atomization Process of Lateral Flow in Injector Nozzle

  • Ishimoto, Jun
    • 한국전산유체공학회:학술대회논문집
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    • 2006.10a
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    • pp.7-8
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    • 2006
  • The governing equations for high-speed lateral atomizing injector nozzle flow based on the LES-VOF model in conjunction with the CSF model are presented, and then an integrated parallel computation are performed to clarify the detailed atomization process of a high speed nozzle flow and to acquire data which is difficult to confirm by experiment such as atomization length, liquid core shapes, droplets size distributions, spray angle and droplets velocity profiles. According to the present analysis, it is found that the atomization rate and the droplets-gas two-phase flow characteristics are controlled by the turbulence perturbation upstream of the injector nozzle, hydrodynamic instabilities at the gas-liquid interface, shear stresses between liquid core and periphery of the jet. Furthermore, stable and a high-resolution computation can be attained in the high density ratio (pl/ pg = 554) conditions conditions by using our numerical method.

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A high-resolution mapping of wind energy potentials for Mauritius using Computational Fluid Dynamics (CFD)

  • Dhunny, Asma Z.;Lollchund, Michel R.;Rughooputh, Soonil D.D.V.
    • Wind and Structures
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    • v.20 no.4
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    • pp.565-578
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    • 2015
  • A wind energy assessment is an integrated analysis of the potential of wind energy resources of a particular area. In this work, the wind energy potentials for Mauritius have been assessed using a Computational Fluid Dynamics (CFD) model. The approach employed in this work aims to enhance the assessment of wind energy potentials for the siting of large-scale wind farms in the island. Validation of the model is done by comparing simulated wind speed data to experimental ones measured at specific locations over the island. The local wind velocity resulting from the CFD simulations are used to compute the weighted-sum power density including annual directional inflow variations determined by wind roses. The model is used to generate contour maps of velocity and power, for Mauritius at a resolution of 500 m.