HyperWorks for CFD AcuSolve 2017을 활용한 Two-phase 유동 해석 수행 방법 소개 Business Development Dept. Dong-Hwan Kim 2017 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Contents • AcuSolve의 간략 소개 • AcuSolve의 two-phase 유동 해석 기능 소개 • Simple 모델을 사용한 해석 수행 방법 소개 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AcuSolve의 간략 소개 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AcuSolve overview • A Finite Element Method (FEM) based general-purpose flow solver • Key Benefits • Robustness – Stable simulations and accurate results regardless of quality and topology of mesh • Speed - Fully coupled solver taking advantage of shared-memory and distributed parallel systems • Accuracy - Highly accurate in space and time while globally and locally conservative • ACUSIM Software Inc. acquired by Altair Engineering Inc. in January 2011 • Current AcuSolve customers are spread across the United States, Canada, Mexico, India, Japan, England, France, Germany, Italy, Spain, Brazil, Singapore, China and South Korea © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AcuSolve overview • AcuSolve Merit • Element Types • 4-noded tetrahedral • Element Quality • AcuSolve is very forgiving of poor element quality © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AcuSolve overview • AcuSolve Merit • Multi processing interface • Coupled thermal analysis • Drastic improvements to parallel scalability • Enthalpy transport equation • Conjugate heat transfer • Conduction & Convection • Enclosure radiation • Parallel view factor computation • Solar radiation © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AcuSolve overview • AcuSolve Merit • High performance capability of Multiphysics • 1 or 2 way simulation with Structural, Multibody dynamics, Electromagnetic analysis © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AcuSolve의 two-phase 유동 해석 기능 소개 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Two-phase flow of AcuSolve • AcuSolve 2017 represents the first release of the solver targeted towards the simulation of multiphase flows. • Level Set Method • Solves a transport equation for level set (distance from interface) • A re-distancing equation is solved at the end of each time step to sharpen interface(s) Three dimensional dam break with obstacle, validation case. © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Two-phase flow of AcuSolve • Initial offering of multiphase is targeted at applications that are typically two phase simulation • Slug flows • Free surface flows • Stratified flows • Application areas Heated fluid with high density falling into tank. • Pouring liquids • Tank filling/draining applications • Deforming free surfaces • Tank sloshing applications Multiphase simulation of fuel tank filling. © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Two-phase flow of AcuSolve • Validation cases Wigley Hull(Free surface wave) Two Dimensional Dam Break © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Two-phase flow of AcuSolve • Validation cases Step Cavity Filling Two Dimensional Tank Sloshing © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Two-phase flow of AcuSolve • Robust implementation • No limit on the density ratio of the two fluids, enabling the simulation of air/water, oil/water, etc. • CFL limitation for accuracy and solution development is not restricted to 1.0 • Can be used with complete AcuSolve feature set • Heat transfer MBD Cosimulation with MotionSolve – Multiphase fuel tank sloshing. • Turbulence • Moving and deforming meshes • Non-conformal interfaces • Fluid-Structure Interaction • Rigid body dynamics • Flexible bodies • Particle Tracing © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Demonstration 간단한 모델을 사용한 해석 수행 방법 소개 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Demonstration 1 • How to use two-phase analysis of AcuSolve • Problem Description • Simulation of breaking of a dam • Initially a square column of water at hydrostatic equilibrium 1.25a g v = 0 • Liquid column free to flow from t = 0 s a a • Transient 2D analysis 5a a = 0.05715 m • Focus on the surge front velocity (v) t = 0 v > 0 s t > 0 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Demonstration 1 • Result © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Demonstration 2 • How to use two-phase analysis of AcuSolve • Problem Description • Tank containing water and air 0.1 m • Initial water level set to y = 0 m 1.0 m y = 0 • Injecting water with 1.5 m/s through an inlet at t = 0 s t = 0 • Two-dimensional problem by including 1.0 m only a single layer of extruded elements in the span direction 1.4 m • Transient two-phase flow simulation t > 0 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Demonstration 2 • Result © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 기술지원안내 • 기술지원 연락처 • 이메일: [email protected] • 알테어블로그 • http://blog.altair.co.kr/ • 정규 교육 과정 • 웨비나 과정 • 교육 자료 다운로드 • 알테어 제품군 최신 기술 정보 • 알테어 하이퍼웍스 홈페이지 • http://www.altairhyperworks.co.kr/ • 소프트웨어 다운로드 • 문서 자료 © 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Our Vision To transform product design and organizational decision making by applying simulation, optimization and high performance computing throughout product lifecycles. © 2016 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Altair Numbers 30+ years driving innovation $300+ million in revenue 45+ offices in 22 countries 2,600+ creative designers, engineers, scientists, and developers 150+ technology and business partners 5000+ customers.