introduction to msc cfd solutions

｜1© Software Cradle

Introduction to MSC CFD solutions

scSTREAM (Heat Designer)

Yuya AndoPresident

Cradle North America


1. scSTREAM Overview

2. Electronics Examples and Features

3. Architecture Examples and Features

Agenda


Products

Thermal, Fluid & Multiphase ThermalThermal & Fluid

GeneralBuilding

Architecture Electronics

>≈ >>

Electronics PCB

Unstructured Mesh Structured Cartesian Mesh

Physics

Industry

Mesh


SCSTREAM OVERVIEW


Low Memory Consumption

Operability

Rapid Meshing

Features of scSTREAM

Outstanding Computation Speed and Accuracy

浸水リスク１.avi

蓄熱暖房.avi


• No data cleaning• <1 sec. for 1.5 million elements

• <10 min. Windows XP x64 edition

4GB memory

Intel Xeon X5680 (3.33GHz)

Inside power unit

1.5 million Elements


Operability




Parts Rate of Heat (W)

D1 3.1

D2 1.8

D3 2.5

D4 2.5

D5 2.5

Q1 3.8

Q2 1.0

Q3 1.0

L1coil 0.7

L2coil 2.6

L3 0.4

T1coil 2.1

D1

Q1

Q2Q3

D3D4

D5

C1

RLY1L2

T2

C13

L3

C12

C11

C5

C4

L1

HS1

基板

シャーシ

D2

Location of Parts and Rate of Heat



# of nodes: about 1.5 Million nodes(tetra, prism, pyramid)

Tends to have bad quality mesh at thin parts

It takes long time to specify mesh resolution




Cartesian Mesh(scSTREAM / Heat Designer)

Unstructured Mesh(SC/Tetra)


• Deviation: 5-7% comparing to the experiment at 20 points

Temp Temp



Cartesian Mesh

(scSTREAM)

Unstructured Mesh

(SC/Tetra)

Data Cleaning None 30 minutes

Mesh 0.05 < minutes 10 minutes

Conditions 10 minutes 10 minutes

Calculation 10 minutes 90 minutes

Total 20 minutes 140 minutes


Analysis step and time required


2 million elements / 1GB128 million with 64 GB

Inside power unit1.5 million Elements

2M

1M

0.5M

# of mesh

The # of mesh per 1GB RAM memory

Features of scSTREAM Low Memory Consumption


• Cut cell method approximates a curved surface using pyramids and hexahedrons.

If mesh resolution is sufficient

Features of Cutcell


Cartesian CoordinateCylindrical coordinates Multi-block meshingArbitrary shape meshTransient / Steady stateIncompressible/Compressible Conjugate heat transferNon-Newtonian/NewtonianThermal conduction panel Moving object Various Fan models8 Turb. ModelsLarge Eddie SimulationParallel computing (MPI)UDF

RadiationSolar radiationParticle trackingHumidityDiffusionCondensation/Solidification

Free SurfacePhase Change MaterialMeltingChemical reactionCombustionPorous mediaStatic Magnetic Effect

Diffuser ModelsA/C modelMoisture absorbentVentilation efficiency indicesPlant Canopy ModelWind Index toolDaylight/Artificial Light

Printer-Paper Feeding ModelJoule HeatingPeltierHeatpipeGerber data ImportThermal circuit modelsElectronic Part Maker (IC chips)

Unique capabilities for Architecture

Unique capabilities for Electronics

Physics and Functions


EXAMPLES IN ELECTRONICS


MCAD data:CATIA, SolidWorks, Pro/E, NX, SolidEdge, InventorIntermediate filesParasolid, STEP, ACIS(SAT), VDAFS, IGES, DXF, STL, XGL, NASTRAN, SHAPE

From ECAD• IDF• Gerber

Fans• Fan library• Axial/cross flow• Swirl effect

Heat Sink Models• Pin/plate fins• Peltie models• Heat pipe models

Primitives

ElectronicPartsMaker (IC chips)• Detailed model• Simplified model• Thermal circuit models

Electronics Related Modeling


Examples of Electronics


Commercial Light – By Eolane

“CFD helped identify thermal design flaw ahead of time and fix it before the prototype which achieve huge time and cost savings” “An unique visualization tool HeatPathViewenabled us to understand the flow path which was an eye opening”


HEAT RELEASE DESIGN FOR PRINTED CIRCUIT BOARD BY CO., LTD.

REFER TO THE PDF

http://us.cradle-cfd.com/applications/leaflet/08st_printedcircuitboard.pdf


APPLICATION OF CFD ANALYSIS TO A WHOLE COPIER INCLUDING HEAT TRANSPORT OF PAPER

BY RICOH COMPANY, LTD.

MATERIAL NOT AVAILABLE


PICLS


PICLS: PCB Instant Thermal Analysis


SCSTREAM FORARCHITECTURE


Terrain

Buildings

Merge

Operability (Data Import)

Data Import


Operation within familiar CAD

2 modes for geometry handling

– Detailed model

– Simplified model

Data Import (Revit & ArchiCAD)

Simplified Not simplified

Save days of operation

in data preparation!


HVAC Diffuser Model

Ceiling Cassette(in Four Directions)

Ceiling Cassette(in Two Directions) Wall-mount Unit Portable Unit

Air Conditioner Parts


Outdoor Examples

Functions that are used• Terrain (GIS) and building data import• Wind profile setting by power law• Plant Canopy model

• Wind environment• Ventilation in a tunnel• Gases/Pollutant• Heat Island phenomenon• Flooding


Murakami Index: Considers 16 wind directions, probabilities of wind direction and wind strength to the index of the wind environment

WindTool: assessment tool for wind environment

Assessment of Wind Environment


Outdoor Examples

1,000m

Functions that are used:• Terrain (GIS) and building data import• Wind profile setting by power law• Plant Canopy Model• Diffusion and Chemical Reaction

1,0

00

m

CO2 Concentration



Outdoor Examples


Wind(South)

Small Woods

■Ground Material

1. Asphalt2. Grass , Lawn

Functions that are used:• Terrain (GIS) and building data import• Wind profile setting by power law• Plant Canopy Model• Diffusion and Chemical Reaction• Solar Radiation


Grass and shade of trees

Heat Island Phenomenon

All asphalt



Grass and shade of trees

Air Temperature at 1.5m above ground

Heat Island Phenomenon

All asphalt



Outdoor Examples


Functions that are used:• Terrain (GIS) and building data import• Free surface


Outdoor Examples


Functions that are used:• Free surface• Induced motion • Coupled with Adams

Displacement

Force/Torque


Indoor Examples

• HVAC in indoor spaces

• Indoor air quality

• Thermal comfort

• Ventilation efficiency

• Natural Ventilation

• Humidity simulation

• Smoke simulation

• Daylight and Artificial Light

Functions that are used:• Revit Import• Solar Radiation


Thermal Comfort in the Office Building


Data Center – Blackout and Recovery Scenario


Ventilation of Car Parking Lot: Age of Air Index

Unwanted air circulation!


Ventilation of Car Parking Lot: Age of Air Index

Small index for age of air= High ventilation efficiency

No circling airflow

Added fan


Daylight and Artificial Light Analysis

Lighting

Ceiling light

Spotlight

Illuminance at a probe face (height: 1 m)

Only the spotlight is on. All the lights are on.

LuminanceIlluminance of lighting sourcesDaylight AutonomyContinuous Daylight AutonomyDaylight FactorUseful Daylight Illuminance


Thank you for your attention

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