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KyungWon Engineering & Communication

First Talks for introducing OpenSource OpenFOAM

호서대 OF미팅

05. 26, 2015

김군홍

경원이앤씨

seminar_KWEnC2015

KyungWon Engineering & Communication Copyright

OpenFOAM Foundation | OPENFOAM and OpenCFD are registered trademarks of

OpenCFD Ltd.

OpenFOAM

=

OpenSource

Field of Operation And Manipulation

KyungWon Engineering & Communication Contents

1. OpenFOAM 소개와 생각

2. OpenFOAM 적용 프로세스

3. KWEnC 활용 사례(연소 분야)

4. GUI 개발 방향 소개

KyungWon Engineering & Communication About OpenFOAM

OpenFOAM is a free, open source CFD software package, licensed and distributed

by the OpenFOAM Foundation .

www.openfoam.org

A large user base: most areas of engineering and science,

from both commercial and academic organisations.

An extensive range of features to solve anything from complex fluid flows.

http://www.openfoam.org/




KyungWon Engineering & Communication Features of OpenFOAM

By being open, OpenFOAM offers users complete freedom to customise and

extend its existing functionality.

Solver Capabilities Incompressible flows Multiphase flows Combustion Buoyancy-driven flows Conjugate heat transfer Compressible flows Particle methods (DEM, DSMC, MD) Other (Solid dynamics, electromagnetics)

Library Functionality Turbulence models Transport/rheology models Thermophysical models Lagrangian particle tracking Reaction kinetics / chemistry

Code Customisation Creating solvers in OpenFOAM Extending library functionality

Post-processing ParaView and VTK post-processing Run-time post-processing Third-party post-processing

Meshing Tools Mesh generation in OpenFOAM Converting meshes into OpenFOAM format Tools to manipulate meshes

Core Technology Numerical method Linear system solvers ODE system solvers Parallel computing Dynamic mesh

A highly modular code design

http://www.openfoam.org/features/standard-solvers.php#incompressibleFlowSolvers

http://www.openfoam.org/features/standard-solvers.php#multiphaseFlowSolvers

http://www.openfoam.org/features/standard-solvers.php#combustionSolvers

http://www.openfoam.org/features/standard-solvers.php#heatTransferSolvers




http://www.openfoam.org/features/standard-solvers.php#compressibleFlowSolvers

http://www.openfoam.org/features/standard-solvers.php#DSMCSolvers

http://www.openfoam.org/features/standard-solvers.php#MDSolvers

http://www.openfoam.org/features/standard-solvers.php#stressAnalysisSolvers

http://www.openfoam.org/features/standard-solvers.php#electromagneticsSolvers

http://www.openfoam.org/features/turbulence.php

http://www.openfoam.org/features/transport.php

http://www.openfoam.org/features/thermophysical.php



http://www.openfoam.org/features/lagrangian.php



http://www.openfoam.org/features/reaction-kinetics.php

http://www.openfoam.org/features/creating-solvers.php

http://www.openfoam.org/features/creating-solvers.php

http://www.openfoam.org/features/extending-libraries.php

http://www.openfoam.org/features/paraview.php





http://www.openfoam.org/features/runtime-postprocessing.php





http://www.openfoam.org/features/third-party-postprocessing.php





http://www.openfoam.org/features/mesh-generation.php

http://www.openfoam.org/features/mesh-generation.php

http://www.openfoam.org/features/mesh-conversion.php




http://www.openfoam.org/features/mesh-manipulation.php

http://www.openfoam.org/features/numerical-method.php

http://www.openfoam.org/features/linear-solvers.php

http://www.openfoam.org/features/ODE-solvers.php

http://www.openfoam.org/features/parallel-computing.php

http://www.openfoam.org/features/mesh-motion.php

KyungWon Engineering & Communication The OpenFOAM Foundation

The OpenFOAM® Foundation is a not-for-profit organisation, founded in 2011,

that manages the development of OpenFOAM and distribution to the public

under the GPL.

a Board of Directors including;

Henry Weller (creator and architect of OpenFOAM)

Chris Greenshields, CFD Direct

Cristel de Rouvray, ESI Group.

a Governance Structure;

Financial Membership for organisations that pay a fee to fund the Foundation

and participate in the evolution of the software.

Contributing Membership for individuals that make a significant personal

contribution to OpenFOAM, for the public good.

Technical Committees, that participate in software management, such as model

implementation, testing and validation.

KyungWon Engineering & Communication OpenSource OpenFOAM

As the copyright holder, the Foundation licenses OpenFOAM free and

open source only, under the GNU general public licence(GPL).

The GPL gives users the freedom to modify and redistribute the software and a

guarantee of continued free use — as long as the terms of the GPL are adhered to. In

particular, there are terms to the GPL that provide protection against exploitation by

companies including OpenFOAM within non-free and/or closed source software

products.

First, when any modified version of the software is redistributed, the source code

must also be made available by the distributor.

Secondly, any modified version can only legally be distributed open source

under the GPL , without limiting the rights on further redistribution. Software

that links intimately enough to OpenFOAM has to be distributed under the GPL as

well. Copyright statements on the software must remain intact.

http://www.gnu.org/licenses/gpl.html

http://www.gnu.org/licenses/gpl.html

http://www.gnu.org/licenses/gpl-faq.html#ModifiedJustBinary



http://www.gnu.org/licenses/gpl-faq.html#GPLInProprietarySystem

http://www.gnu.org/licenses/gpl-faq.html#GPLInProprietarySystem


8

The goal of the Extend-Project is to open the OpenFOAM® CFD toolbox to

community contributed extensions in the spirit of the OpenSource development

model.

www.extend-project.de

Community-driven Releases of OpenFOAM®

The Extend Project covers …

The primary technical mechanisms made available under OpenFOAM extensions at SourceForge.net® for facilitating the worldwide collaborative collaboration are Subversion and GIT Repositories for user developments related to OpenFOAM: http://sourceforge.net/projects/openfoam-extend

The Wiki collects information about the OpenSource CFD toolbox OpenFOAM and provides a platform for joint collaborations. http://openfoamwiki.net

The Extend Test Harness is based on CDash, an open source, web-based software testing server. It is useful for keeping your installation of OpenFOAM-ext up-to-date with the latest source code release, and to run it automatically against a suite of predefined test cases. http://openfoam-extend.sourceforge.net/CDash/index.php

Extend Bug Tracker based upon MantisBT and provided by SourceForge.Net®. It is designed to help quality assurance and intended to provide precise information to the developers on how to reproduce the bug exactly in the underlying system and program version. http://sourceforge.net/apps/mantisbt/openfoam-extend/main_page.php

The OpenFOAM® Extend Project

KyungWon Engineering & Communication OpenFOAM 진화론

오픈소스의 선택 자유

증가하는 사용자

다양한 적용 분야 확대

논문 수 증가

관련 업체 수 증가

적응

유전자 다양성

유전자 부동

유전자 이동

돌연변이

자연선택

공진화

공생

종분화

절멸

OpenFOAM은 CAE 소프트웨어와 오픈 소스 분야에 큰 이슈로 지속적 변화를 주도하고 있다.


와해성 혁신이 가져올

미래 준비됐나요

새로운 기술은 기존 시장을

위태롭게 만들기도 한다. 한국은

이런 혁신을 가로막는 제도가 많다.

선진국에 뒤떨어지고 있다는

뜻이다. 시사IN 제345호, 2014년 4/26

Disruptive Innovation


새로운 기술은 새로운 시장과

직장을 만들어내지만 반대로 기존

체계, 즉 기존 시장과 직업을

위태롭게 만든다. 더불어 새로운

현상을 만들어내기 때문에 새로운

제도와 사회적 합의가 필요해진다.

이런 현상을 일컬어 ‘와해성

혁신(distruptive innovation)’이라고

말한다.

KyungWon Engineering & Communication Brief history

90’s: FOAM developed at Imperial college by H.G. Weller, H. Jasak and others

Nablar Ltd developing and supporting commercial FOAM

1999

OpenCFD Ltd releases OpenFOAM-1.0 under GPL

12/2

004

8/2

005 v1.2

First OpenFOAM workshop in Zagreb

1/2

006

3/2

006

v1.3

4/2

007

v1.4

Second OpenFOAM workshop in Zagreb

6/2

007

Third OpenFOAM workshop in Milan

6/2

008

7/2

008

v1.5

International OpenFOAM Conference in London

11/2

007

Open Source CFD International Conference in Berlin

12/2

00

8

6/2

009

Fourth OpenFOAM workshop in Montreal

7/2

009

v1.6

Open Source CFD International Conference in Barcelona

11/2

009

3/2

005

v1.1

2/2

010

KWEnC established

3/2

010

KWEnC starts services for OpenFOAM

KyungWon Engineering & Communication Brief history

OpenFOAM User Conference in Frankfurt

4/2

013

6/2

011

V2.0

12/2

011

V2.1

3/2

013

V2.2

6/2

011

Sixth OpenFOAM workshop in PennState

11/2

011

KWEnC User Meeting in Yong-In

4/2

013

KWEnC User Meeting in Won-Ju

4/2

012

6/2

011

ICON programing training course (1) 6/2

012

Seventh OpenFOAM workshop in Darmstadt

6/2

013

Eighth OpenFOAM workshop in Jeju

KWEnC User Meeting in Yong-In

5/2

011

Open Source CFD International Conference in Paris

10/2

012

Open Source CFD International Conference in London

10/2

013

Open Source CFD International Conference in Hamburg

6/2

010

v1.7

Open Source CFD International Conference in Munich

11/2

010

6/2

010

Fifth OpenFOAM workshop in Gothenburg

5/2

010

OpenCFD training course (1)

8/2

011

SGI acquires OpenCFD Ltd

9/2

012

ESI acquires OpenCFD Ltd

6/2

014

Ninth OpenFOAM workshop in Zagreb

2/2

014

V2.3

KyungWon Engineering & Communication Working processes of OpenFOAM

CAD MESH SIMULATION DATA-MANIPULATION

OpenFO

AM

- A

PPLIC

ATIO

N

DATA

-UTIL

ITY

MESH

-UTIL

ITY

SALOME

FreeCAD

PARAVIEW

GNUPLOT

OPENFOAM-Framework

Helyx-OS

KyungWon Engineering & Communication What can u do?

OpenFOAM 소스 체계에서 무엇을 할 수 있을까?

어떻케하면 “What to do”를 달성할 수 있나?

My ever Best Way is to

it.

KyungWon Engineering & Communication GUI is getting popular!

DICE (SSP, http://dicehub.net/): Dynamic Interface for Computation and Evaluation

Discretizer (Bjorn Bergqvist, http://www.discretizer.org/)

enGrid (enGits, engits.eu)

Helyx-OS (engys, http://engys.com/)

pyFoam (https://openfoamwiki.net/index.php/Contrib/PyFoam)

-----------------------------------------------------------

simFlow (simFlow CFD software, https://sim-flow.com/)

OpenFlow (Symscape, http://www.symscape.com)

DHCAE Tools (DHCAE Tools GmbH, http://www.dhcae-tools.com/)

iconCFD (icon, www.iconcfd.com)

blueCFD-AIR (blueCAPE, http://joomla.bluecape.com.pt/)

CFD support products (http://www.cfdsupport.com/)

cfSuite (Creative Fields, http://www.c-fields.com/)

Visual-CFD (ESI, http://www.esi-group.com)

OpenFOAM의 핵심 가치는 아니지만, 다양한 GUI 사업화가 활발하게 진행되고 있다.

http://dicehub.net/

http://dicehub.net/

KyungWon Engineering & Communication KWEnC 연소 모델링 소개

1. Detailed Combustion Modeling

2. Lab-Scale Combustor

3. Real-Scale Combustion System


Diluted Hydrogen Jet Flame

Temperature OH mole fraction

0

10

20

30

40

50

[mm]

0

10

20

30

40

50

[mm]

Combustion: Laminar flames


Axial OH mole fraction

● Three diffusion models show no clear differences due to diluted fuel(50%N2/50%H2) chemistry.



Axial Temperature & major species



Radial Temperature & species



22

Experiment of IFRF 0.8MW Oxy-NG flame furnace:

The high-momentum jet flame is issued from the burner into the refractory-

lined furnace.

Lab-Scale Combustor: Oxy-NG Flame

NG central tube 𝐷𝑔 = 16𝑚𝑚

Oxygen annulus 𝐷𝑖 = 28𝑚𝑚 𝐷𝑜 = 36𝑚𝑚

1050mm

1050mm

3440mm

740mm

Chimney 𝐷𝑜𝑢𝑡 = 500𝑚𝑚

Geometry & Mesh

Quarter volume = 218,013 cells


23

- Burner inlet condition

Boundary Pressure

Mass Flow rate

Mean Axial Velocity

Temperature

Pa [kg/h] [kg/s] [m/s] [K]

Fuel inlet 101325 63 0.0175 114.19 298.15

Oxy inlet 101325 224.5 0.062361 118.53 298.15

- Burner inlet chemical composition

Boundary Species

Molecular weight

Formation enthalpy

Molar fraction

Mass fraction

Perfect Mixing Mass fraction(2)

[-] [kg/kmol] [J/kmol] [%] [-] [-]

Fuel inlet

C1.122H4.244(1)

17.75434 -7.663413e+07 93.99 0.8940 0.195903

CO2 44.00995 -3.935324e+08 1.79 0.0422 0.009247

N2 28.01340 0 4.01 0.0602 0.013192

O2 31.99880 0 0.21 0.0036 0.781658

Air inlet O2 31.99880 0 1.0 1.0

(1)Numerical model natural gas 조성 : CH4(86%vol), C2H6(5.6%vol), C3H8(1.87%vol),C4H10(0.58%vol), C5H12(0.14%vol), CO2(1.79%vol),N2(4.01%vol),O2(0.21%vol) (2) Perfect mixing mass fraction at Outlet

- Furnace wall Temperature condition 𝑇 𝑥 = 1700.598 + 212.5872𝑥 − 46.66929𝑥2 where, x= axial distance from burner-tip

- Turbulence model : compressible 𝑘 − 𝜔 𝑆𝑆𝑇 𝑚𝑜𝑑𝑒𝑙

- Reaction mechanism : modified Jones-Lindstedt 4-step Mechanism

- Radiation model : P1 model with greyMeanAbsorptionEmission model

Lab-Scale Combustor: Condition


24

Lab-Scale Combustor: Flame Field

With strong entrainment of hot gas, jet-like flame is detached from tip of

burner and maintains stable reaction.

𝑈𝐹𝑈𝐸𝐿 = 114.19𝑚/𝑠

𝑈𝑂𝑋𝑌 = 118.53𝑚/𝑠

Lift-off


25

Lab-Scale Combustor: Validation D

ista

nce

[m

] fr

om

burn

er-

tip

Radial distance [m] from center-axis

Compared to measurements and others’ simulations, the code shows

sufficient predictability for steady combustion.


26

Thermal condition of slabs is the very important point in simulating slab-

reheating furnace. Actually heat capacity of slabs has a large portion of heat

balance in RHF

=> How to calculate temperatures of slabs?

Industrial Combustor: Reheating Furnace

Slabs in RHF

http://www.fivesgroup.com/

Discharge Door

Cold slab

Hot slab Charging slab


27

Code Development of Reheating Furnace

FURNACE ASSEMBLY

Slab Array(static) Conduction

Furnace Walls Fixed Temperatures

Two different simulations are applied cyclically in order to calculate more

realistic thermal values in slab-array.

Furnace Chamber Flow

Species Chemistry

Energy Radiation

FURNACE ASSEMBLY

Slab Array(dynamic) Conduction

Furnace Walls Fixed Temperatures

Furnace Chamber Flow

Species Chemistry

Energy Radiation

Slab Temperatures

Flame Fields

Flame Code Weakly-Coupled Heat Code

Simulation Cycle


28

MESH

BURNER

DIVIDED FURNACE

UNIT-BURNER

FURNACE ASSEMBLY

SIMULATION

MESH Quality FLAME Conditions

SINGLE CHAMBER

DATA ANALYSIS

COARSE FURNACE

REFINED FURNACE

Divided topology of furnace

Mesh refinement topology

Stich burners on furnace

Reacting flows Reheating Performance

Emissions etc

Estimation of Initial temperatures based on given data

Operating conditions

SLAB ARRAY

Simulation Processes of Reheating Furnace

Processes of RHF-simulation


29

Slab-reheating furnace

Burner system: total 56 number • Regenerative burners: total 48 number • Air-staged burners: total 8 number -Combustion-mode: 24 -Exhaust-mode: 24 • Chemistry • Chemistry -Fuel: COG+BFG (27℃) -Fuel: COG+BFG (27℃) -Oxidizer: heated air (990℃) -Oxidizer: heated air (500℃) Slab-Array: total 19 number (weight: ~24.7 Ton/#) • Heating time: 212 min • Charging temperature (30℃), Discharging temperature (1197℃)

4.7

6 m

Charge Door-Side

Discharge Door-Side

Chimney


30

4.7

6 m

Multiple Flames in RHF

With frozen temperatures of slab-array, steady flame calculation is done to

simulate reacting flows in furnace.

• Complex flows improve homogeneity of gas temperatures around slabs


31

Slab-Heating Performance

History of slab-temperature shows a reasonable result to evaluate the

heating performance of RHF.

Initial assumption

Soaking Zone

Heating Zone

Pre-Heating Zone(II)

Pre-Heating Zone(I)

Conve

ctio

n

Zone


32

OpenFOAM 활동: 연소(화학반응) [1/4]

사업화 기간: 2010년 ~ 현재

• 분야:

- 프로그램 개발/해석 용역: OpenFOAM, python, salome etc (오픈 소스 SW)

- 교육: OpenFOAM Basic/Advanced

연소해석 전문가: 3인

(1) 김군홍 수석: 지도교수(한양대 기계공학과 김용모 교수)

박사학위: Conditional Moment Closure and Transient Flamelet Modeling for Detailed Structure and

NOx Formation Characteristics of Turbulent Nonpremixed Flames(2006)

심사위원: Robert W. Bilger(Univ. of Sydey), 허강렬 교수(포항공대), 김세원 박사 (한국생산기술연구원),

이창식 교수, 김용모 교수(한양대)

석사학위: 층류 비예혼합 화염장의 온도 및 농도 계측에 대한 연구(1998)

(2) 김창환 선임: 지도교수(한양대 기계공학과 김용모 교수)

석사학위: 네트워크 화학반응모델을 이용한 가스터빈 연소기의 연소 과정 및 공해 배출 특성 해석 (2009)

(3) 오경택 주임: 지도교수(한양대 기계공학과 김용모 교수)

석사학위: 난류 선회 등온 및 연소 유동장 불안정성의 수치해석 (2012)


33


학술 활동: 2010년 ~ 현재

• Gun-Hong Kim, Kyung-Taek Oh, Chang-Hwan Kim, Deok-Hong Kang, “Application of OpenFOAM to simulate

steady combusting flow in industrial furnaces,” 9th OpenFOAM Workshop, 23-26 June 2014 in Zagreb, Croatia

(2014)

• 김군홍, 오경택, 김창환, 강덕홍, “오픈 소스 OpenFOAM을 이용한 철강 산업 가열로 내부 화염장과 슬라브

온도의 해석적 연구,” 제 48회 KOSCO SYMPOSIUM 2014년도 춘계 학술대회 (2014)

• 오경택, 김군홍, “오픈소스 OpenFOAM을 이용한 실제 금속폼의 유동 및 열전달 특성,” 한국전산유체공학회 추계

학술대회 (2014)

• 오경택, 김군홍, “오픈소스 OpenFOAM을 이용한 정상상태 난류 연소장에 대한 해석적 연구,” 제 47 회 KOSCO

SYMPOSIUM 2013년도 추계 학술대회 (2013)

• 김군홍, 오경택, “오픈소스 OpenFOAM을 이용한 3차원 공간 내의 수소 화염 가속화에 대한 해석적 연구,”

한국전산유체공학회 추계학술 대회 (2013)

• Ki-Young Jung, Yongmo Kim, Gunhong Kim, “Implementation of RIF Model into OpenFOAM,” 8th OpenFOAM

Workshop, Jeju Korea, 11-14 June, (2013)

• Gunhong Kim, Sangtae Jeon, Jeongwon Lee, Yongmo Kim, “DQMOM-based PDF Transport Modeling for

Turbulent Lifted Flame with Autoignition,” 8th OpenFOAM Workshop, Jeju Korea, 11-14 June (2013)

• Kyung-Taek Oh, Gun-Hong Kim, “LES-based Flamelet Modeling for Instabilities of Turbulent Swirling

isoThermal and Reacting flows,” 8th OpenFOAM Workshop, Jeju Korea, 11-14 June (2013)

• Jongtae Kim, Sang-Baik Kim, Seong-Wan Hong, Gun-Hong Kim, “Use of OpenFOAM for Evaluation of

Hydrogen Safety in a Nuclear Power Plant,” 8th OpenFOAM Workshop, Jeju Korea, 11-14 June (2013)

• GunHong Kim, KiYoung Jung, Yongmo Kim, “Implementation of the detailed chemistry and variable transport

properties for simulating laminar chemically reacting flows,” 8th OpenFOAM Workshop, Jeju Korea, 11-14 June

(2013)


34


• 김군홍, 김상택, 홍성완, “오픈 소스 OpenFOAM을 이용한 원자력 격납 건물용 피동형 촉매 재결합기 수치해석

모델 개발,” 한국전산유체공학회 추계학술 대회, 부산대학교, 11월 23일 (2012)

• 김군홍 “오픈 소스 OpenFOAM을 이용한 층류 수소 제트 화염장 내의 다종 확산 수치해석 모델 개발,” 45th

KOSCO SYMPOSIUM, 추계 (2012)

• Mino Woo, Changhwan Kim, Gunhong Kim, “Consideration on heat and reaction in metal foam,” 7th

OpenFOAM Workshop, Darmstadt, Germany, 25-28 June (2012)

• GunHong Kim, Mino Woo, Jongtae Kim, Sang-Baik Kim, “Simulation of Hydrogen Flame Acceleration by using

XiFoam,” 6th OpenFOAM Workshop, PenState University, USA, 13-16 June (2011)

• 김종태, 김상백, 김군홍, “밀폐된 격실에서의 수소화염 가속에 대한 수치해석,” 한국전산유체공학회 춘계학술대회

(2011)

• 김종태, 김상백, 김군홍, “원자력 발전소 격실에서의 수소화염 가속에 대한 수치해석 연구,” 한국전산유체공학회,

Vol. 15, No. 4, pp. 67-75 (2010)

KyungWon Engineering & Communication GUI 개발 방향

Customized Interfacing GUI

OpenFOAM에 전용화된 사용자 환경을 구축할 수 있는 GUI 플랫폼 개발

Salome(CAD/Mesh) InterFACE to OpenFOAM Paraview

Gnuplot

Other Commercial CAD/Mesh SWs

Import CAD

Import Mesh

Mesh

Utility

Case Setup

Execution

Post-view ?


EOD

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