introducing msc cfd solutionsdocs.mscsoftware.ru/conf/forum2017/day1/04_sct_msc_russia.pdf · ©...

｜1© Software Cradle

Introducing MSC CFD solutions

SC/Tetra (and scFLOW)

Yuya Ando

President

Cradle North America


About Cradle

Products

SC/Tetra Overview

Overset Mesh

Examples by Industry

Coupled Solutions to Come

Contents


Establishment: March 22, 1984

Offices:

Headquarters: Osaka, Japan

Branch Offices: Tokyo, Japan

Dayton, OH

Lyon, France

Affiliated: Bangalore, India

Taipei, Taiwan

Tokyo, Japan

HeadquartersOsaka, Japan

Cradle North America, Inc.Dayton, OH

Corporate Profile


Products

Thermal, Fluid & Multiphase ThermalThermal & Fluid

GeneralBuilding

Architecture Electronics

>≈ >>

Electronics PCB

Unstructured Mesh Structured Mesh

Physics

Industry

Mesh


SC/TETRA


Concepts

– Easy

– Fast

– Accurate

History Behind SC/Tetra

AWARD:

2002: JSME Tech Award

2005: Awarded by METI (Ministry of Economy, Trade and Industry of Japan)

2006: AEI2006 Tech Awards (Automotive Engineering International)

2007: Certification of Visualization Award (APCOM)

2009: Best CFD Graphics Award (The Japan Society of Fluid Mechanics)

SC/Tetra V1 in 1997 on Windows

All-In-One Package


All-in-one package CFD:

• Preprocessor

• Solver

• Pressure based FVM

• Density based FVM

• Adjoint Solver

• Linear Static FEM

• Postprocessor

• Optimization

History Behind SC/Tetra

http://www.sctetra.com/image/applications/03_radiator_1.jpg


Mesh data

NASTRAN *.nas

UNIVERSAL *.unv

ABAQUS *.inp

CGNS *.cgns

Tecplot *

(.fmt, .p2dfmt,

p3dfmt, .dat)

Drag & Drop

Native CAD data

CATIA V4 * .model, .session, .exp

CATIA V5 * .catpart, .catproduct

PRO/E, Creo * .asm, .prt

Inventor * .ipt, .iam

SolidWorks * .sldprt, .sldasm

NX * .prt

SolidEdge * .par

Intermediate data

Parasolid XT *.x_t

STEP *.stp, .step

STL *.stl

DXF *.dxf

IGES * .iges, .igs

ACIS(SAT) * .sat

VDAFS * .vda

Data Import

Easy – Data Import


2 million elements/1 GB RAM

With 64GB: 128 million elements

More complicated geometry

Better accuracy

2 M

1M

0.5M

# of meshComparison of the # of

elements per 1GB RAM

Efficient – Low Memory Comsuption


Vehicle body

Comparison of Commercial CFD software held by SAE in Japan

CD CL

Experiment 0.245 -0.273

SC/Tetra 0.247 -0.275

Error <1% <1%

[Reference 1] Kumano, T. Et al., Wind Tunnel Testing of a 1/5 Scale Vehicle Model (in Japanese), JSAE symposium on Recent Activities in CFD toward Higher Quality, No. 08-06 (2006).

[Reference 2] Shimano, K. Et al., Wind Tunnel Testing of JSAE Standard Low- aerodynamic-drag Vehicle Body Using 1/5 Scale Model, Review of Automotive Engineering, Vol. 30, No.1, (2009).

Accurate


CENTRIFUGAL PUMP BY TERAL INC.

REFER TO PDF


Mesh Comp. Time (8 parallel)

Total drag, N

Experiment 52.8 - 54.48

SC/Tetra (SST k-ω) 5.7 Million 6 hours 53.14

Drag Prediction of Ship Hull (Bulkcarrier, St. Michaelis)

Accurate


Diameter： 250 mm

Rotation speed： 25 rps

Propeller rotate region

570 2000600

OutletInlet

60

0Ship Propeller Cavitation (Potsdam Propeller Test Case)

Accurate


KT (Thrust coefficient) Exp: 0.3725 Cal: 0.3750 (+0.67%)

Accurate


Vertex-centered control volumes (Polyhedral CV)

3D image

Efficient and Accurate


OVERSET MESH


Velocity Mesh movement

Overset Mesh


Overset MeshPositive Displacement Pumps / Valves


Overset MeshInduced Motion, 6 degrees of freedom, Freesurface


Fluid Structure Interaction

Large deformation due to Overset mesh

Overset Mesh


Fluid Structure Interaction

Contacts due to Overset Mesh

Overset Mesh


EXAMPLES IN VARIOUS INDUSTRIES


AUTOMOTIVE


Automotive – External Flow


Automotive - Component Level Examples


IGBTBattery pack

Battery cooling module

Automotive - Hybrid/Electric Car Parts


Automotive


SC/Tetra + Optimization + Automation

Bobsleigh



Current Model

Initial ModelCATIA V5

SC/Tetra Automation Optimization

Final Shape


14 Design Variables

Multi Objective Function: CD & CL




Base Model

Optimized Shape

Base model Optimized Model

CD 0.308 0.278CL 0.076 -0.129

-11%


SHIPBUILDING


Cruising Vessel Posture Simulation - Using Free Surface Analysis (By Yamaha Motor Co., Ltd.)

“The stabilizing fin is confirmed to lower the heel angle. The simulation correlated well with measurements.”


CRUISING VESSEL POSTURE SIMULATION USING FREE SURFACE ANALYSIS

BY YAMAHA MOTOR CO., LTD.

REFER TO THE PDF

Cruising Vessel Posture Simulation


Estimate Ship Hull Pressure Fluctuation due to Cavitation from the Propellers

Ship body: SeiunmaruPropeller: HSP-II, CP-II Scale: 1/16.293 RPM: 163


Estimate Ship Hull Pressure Fluctuation due to Cavitation from the Propellers

Pressure [Pa]


TURBOMACHINERY


Fish Past (Non-Newtonian Fluid)

Positive Displacement (Using Overset mesh)

Single Screw Extruder


Positive Displacement Pump (Using Overset Mesh)

Cavitation

Gear Pump


AEROSPACE


Transonic Flow (Mach number:0.729, Re= 6.5×106)

RAE2822 airfoil at 2.31º angle of attack.

– Turbulent flow with SST k-ω model

– Simulation results: Pressure distribution

Validation

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

0.0 0.2 0.4 0.6 0.8 1.0

-Cp

X/D

Experiment, lower surfaceExperiment, upper surfacePressure-based solverDensity-based solver

Reference[1] Cook, P. H. et al. Aerofoil RAE 2822 - Pressure Distributions, and Boundary Layer and Wake

Measurements. AGARD Report AR 138. 1979.


Supersonic flow: shock wave propagation (Ma=5.09)

Validation

Reference[1] Bazhenova, T. V.; Gvozdeva, L. G.; Nettleton, M. A. Unsteady interactions of shock

waves. Prog. Aerospace Sci., 1984, 21(4), p. 249-331.

• SC/Tetra

• density gradient (animation)EXE. Schlieren photograph[1]


Validation: NASA CRM

Analysis conditions (Challenge 1-1)

– Geometry: deformed shape measured in a wind tunnel experiment

– Conditions: M=0.847, Re=2.26×106, Tref=284 [K]

– Angle of attack (AoA): αc=-0.62, 2.47, 2.94, 3.55, 4.65, 5.72 [deg.]

M=0.847



Surface Cp distribution

– AoA α_c=2.94 [deg.] (no312)



Cross-sectional Cp distribution

– AoA α_c=-0.62 [deg.] (no302)

Section B

Section E Section I



Cross-sectional Cp distribution

– AoA α_c=2.94 [deg.] (no312)

Section B

Section E Section I


V22-Osprey


COUPLED SOLUTIONS TO COME


Automotive - Aero Acoustic (SC/Tetra + Actran)

CFD Analysis by SC/Tetra Sound Propagation Analysis by Actran

Motorcycle Exhaust Systems


SC/Tetra + Adams

SC/TetraADAMSCrosswind pushes the car away

ADAMSSC/Tetra


SC/Tetra + Nastran/Marc

SC/Tetra was coupled with a 3rd party FEM software


SC/Tetra + Nastran/Marc

Courtesy: Dr. George Huang, Professor and Chair of Mechanical Engineering, Wright State University.

SC/Tetra was coupled with a 3rd party FEM software


Thank you for your attention

introducing msc cfd solutionsdocs.mscsoftware.ru/conf/forum2017/day1/04_sct_msc_russia.pdf · ©...

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