Acusolve 2017을 활용한 Two-Phase 유동 해석 수행 방법 소개

HyperWorks for CFD

AcuSolve 2017을 활용한 Two-phase 유동 해석 수행 방법 소개

Business Development Dept.

Dong-Hwan Kim

• AcuSolve의 간략 소개

• AcuSolve의 two-phase 유동 해석 기능 소개

• 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

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]

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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

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