(Microsoft PowerPoint _FLOW-3D_coating&others.ppt [\310\243\310\257 \270\360\265\345])

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TEL.02-2026-0440 FAX.02-2026-0460 FLOW-3D for Coating & MEMS http://www.

1 TEL FAX FLOW-3D for Coating & MEMS

2 FLOW-3D 의장점 해석모델작성용이 경계밀착격자를사용하지않고직각격자, FAVOR 기법사용 격자생성에필요한시간및노력최소화 수위경계조건 ( 시간에따라변화가능 ) 제공 해의정확성및신속성 자유수면해석의정확성 FLOW-3D VOF 방법최초적용 (30년간개발, 다양한 VOF 방법제공 ) One Fluid Model 공기의유동은해석하지않음 계산속도향상 공기로의운동량확산이없어해의정확성향상 지형및구조물영역은계산시자동제외 ( 속도향상 ) 해의발산시자동복구기능 ( 시간증가분감소후자동재해석 ) 타 CFD S/W Mentor Tip 제공으로해석의신뢰성향상

3 FLOW-3D Vs. FLUENT Vs. CFX FLOW-3D FLUENT CFX 수치해석방법 Finite Volume Approach Finite Volume Technique Finite Volume Technique Mesh Type Rectangular Grid Technique Unstructured Mesh Unstructured Mesh Geometry 형성 Built-in Obstacle Modeler CAD input import Built-in Obstacle Modeler CAD input import Built-in Modeler CAD input import 해석영역 Gridding Rectangular Mesh와 Obstacle과의 interface가 F AVOR 기법에의해유동장및비유동장에 Mesh 형성 (obstacle이 mesh영역에존재함으로써 grid 자동생성 Obstacle 정의에따라 grid modeler 를사용하 여 grid 생성 (mesh type 에따라 user 가 gambi t 에서 grid 를작성함 ) Finite Element Technique 응용성 General All in One Model General Model (Newtonian, Non-Newtonian, Free Surface 문제등에따라모듈분리 ) Multiphase, Radiation, Combustion, Free Surface 등 Module 분리 계산속도빠른 Preprocessing 을통한 Setup Grid 생성에상당기간소요 Free Surface 매우정확 (VOF technique) VOF 를사용하지만경계조건적용방법이달 라정확한 VOF 가아님 VOF 를사용하지만경계조건적용 방법이달라정확한 VOF 가아님 Chemical Reaction Passive Reaction Generalized Reaction Generalized Reaction

4 FLOW-3D 사용자 해외업체 GM, Ford, Fiat, Renault, Honda, Toyota, Hitachi, Volvo, VAW Aluminum AG, ALCAN(Aluminum Canada), Alcoa Technical Center, Alumax, Buhler AG, Achen(Institut fur Verfahrens Technik), 등세계 550여업체 국내업체 ( 판매 ) 현대-기아자동차, 삼성종합기술원, 삼성모바일디스플레이, LG전자, LG생산기술원, POSCO, Liquid-metal, KIST, 현대건설, 한국수자원공사, 한국농어촌공사등 서울대, 고려대, 연세대, 서울시립대, 부산대, 인하대, 포항공대, 국민대, 충북대, 성균관대, 대불대, 강원대, 한서대, 한양대, 한국기술교육대, 동의공업대등 국내업체 ( 용역 ) 한국수자원공사, 현대-기아자동차연구소, KIST, 삼성종합기술원, 삼성전자, LG전자, LG생산기술원, 포항제철, 신창전기, 한국전력공사, 한국원자력연구소, 이수금속, 만도기계, 현대중공업, 조선내화, 포스코개발등

5 FLOW-3D 해석사례 1. Coating

6 1. Slot Coating ; Examples

7 1. Slot Coating ; Examples Single-Layer Slot Coating with Elastic-Plastic Fluids Newtonian Fluid Contact line locates farther upstream & is stable - Viscosity = 29cp, Density = 1.2g/cm 3, Surface Tension = 61dynes/cm, Static contact angle = 30 Elastic-Plastic Fluid Contact line locates downstream from slot and is susceptible to air entrainment Same properties as Newtonian case, except: Shear modulus (G) = 100Pa, Yield stress (Y) = 100Pa 250µm 500µm Vacuum=300 Pa

8 1. Slot Coating ; Examples Coating Analysis coupled with DYNA3D Pressure Die coater Slit Coating fluid Film(thickness 100µm) Moving velocity U F Animation (U F =200cm/s) CO8 Animation (U F =100cm/s) CO9

9 1. Slot Coating ; Model Physics Model - Gravity - Moving and deforming objects - Surface Tension - Viscosity & Turbulence Boundary Condition - X-min : continuative - X-max : pressure - Z-max : velocity Meshing & Geometry - Cells : 107,160ea - Used 3 solid, 1hole Favorized Component g

10 1. Slot Coating ; Results

11 2. Slide Coating ; Examples

12 3. Dip Coating ; Examples

13 3. Dip Coating ; Model Physics Model - Gravity - Surface Tension - Viscosity & Turbulence Meshing & Geometry - Cells : 2,000ea - No Component Used - Define the fluid area without solid Component Boundary Condition - X-min : wall - V z = 3.31cm/sec Favorized Component

14 3. Dip Coating ; Results Fraction of fluid V z = 3.31cm/sec 0.0sec 0.1sec 0.2sec 0.3sec 0.4sec 0.5sec 1.0sec

15 4. Spin Coating ; Example

: pressure - Y-min / max : periodic - Z-max : pressure Meshing &

16 4. Spin Coating ; Model Physics Model - Gravity - Shallow water - Surface Tension - Viscosity & Turbulence Boundary Condition - X-max : pressure - Y-min / max : periodic - Z-max : pressure Meshing & Geometry - Cells : 9,000ea - Used cylindrical mesh Favorized Component

17 4. Spin Coating ; Results

18 5. Curtain Coating ; Model Physics Model - Gravity - Surface Tension - Viscosity & Turbulence Boundary Condition - Top : velocity - X-max : Continuative Meshing & Geometry - Cells : 330,000ea - Used 1 solid, 1hole Favorized Component

19 5. Curtain Coating ; Results Velocity of fluid sec sec sec sec sec sec sec sec

20 6. Roll Coating ; Model Physics Model - Bubble and phase change - Moving and deforming objects - Surface Tension - Viscosity & Turbulence Boundary Condition - X-min : continuative - X-max : velocity Meshing & Geometry - Cells : 5,775ea - Rotate and translate for component Favorized Component

21 6. Roll Coating ; Results

7. Gravure Printing ; Model Physics Model - Bubble and phase change - Moving and deforming objects - Surface Tension - Viscosity & Turbulence GMO Condition -

22 7. Gravure Printing ; Model Physics Model - Bubble and phase change - Moving and deforming objects - Surface Tension - Viscosity & Turbulence GMO Condition - Prescribe Motion - V z = -120um/sec Meshing & Geometry - Cells : 101,080ea - No Component Used - Define the fluid area without solid Component Favorized Component

23 7. Gravure Printing ; Results sec sec sec sec sec sec

24 * Porous Media Model Distinct Saturation Front or Varying Saturation Complex Geometries with Varying Porosity, Permeability and Wettability Heat Transfer between Fluid and Solids Anisotropic Properties Hysteresis-Wettability Varies with Saturation

25 FLOW-3D 해석사례 2. MEMS

By adjusting the applied potential, the flow rate can be controlled.

26 MEMS By creating a series of deep slots in a microchannel, and then applying a potential across the channel, fluid flow can be controlled. By adjusting the applied potential, the flow rate can be controlled. avi Electrolyte Solution Thin slice with EDL formed on its surface Applied Electric Potential

27 MEMS Dielectric Forces on Mass Particles Mass particles can be dielectric materials. The force on a dielectric particle depend on the value of the particle s dielectric constant with respect to the dielectric constant of the surrounding fluid. In these examples the dielectric constant of the particles is greater than (middle frame) and less than (last frame) that of the surrounding material. Dielectric constant > ambient Dielectric constant < ambient H H H y y y L L L x (x 1.e+04) Early time x (x 1.e+04) Later time x (x 1.e+04)

28 MEMS Sprayed Polymer Particles International Thermal Spray Conference ITSC-2006 Effect of Substrate Roughness on Splatting Behavior of HVOF Sprayed Polymer Particles

29 MEMS Wall Adhesion Adhesion of liquid with solid surfaces can occur at contact lines. This slide demonstrates one use of surface tension and adhesion effects - that of determining the wetting (or non-wetting) properties of rough surfaces. For illustration purposes this is a 2D example. The cylinders have diameters approximating that of coarse hair. g 120µm Contact lines exhibit interesting behavior on rough surfaces. Wetting of rough surfaces

nitrocellulose membrane 혹은 silicon 위에 target DNA (cdna 또는 Oligonucleotide) 를붙인 것.

30 MEMS Micro Arraying ( DNA-Chip or Bio-Chip ) DNA Chip 해석 : 해석을통하여 Probe 와유체간의유동양상을파악할수있다. displacement along z split-pin trajectory time DNA-Chip: 유리판, nitrocellulose membrane 혹은 silicon 위에 target DNA (cdna 또는 Oligonucleotide) 를붙인 것. 형광물질혹은방사선동위원소로표식된탐침 (probe) 과 hybridization 시켜유전자의발현정도, 돌연변이의확인, single nucleotide polymorphism (SNP), 질병의진단, high-throughput screening (HTS) 등에사용할수있다.

31 MEMS Bubble jet solutions FLOW-3D Solver 를통한 Bubble jet 의유동양상해석 Nozzle 를통한액적 (Droplet) 의미소유속및유량을파악가능 Nozzle Thermal Bubble Jet Droplet characteristics 1.E+08 1.E+05 Micro heater Open to ink reservoir droplet velocity 1.E+07 1.E+06 Droplet Translational Velocity Droplet Velome 1.E+04 1.E+03 droplet volume 1.E+05 0.E+00 5.E-06 1.E-05 2.E-05 2.E-05 3.E-05 time 1.E+02

MEMS Bubble jet solutions 1 Hot liquid at same T surrounds bubble with radius=20µm 초기 Bubble 조건이주어진상태에서성장후붕괴되어지는과정을모사 표면온도에서의냉각과팽창으로인한 Bubble 의급냉발생 해석을통해

32 MEMS Bubble jet solutions 1 Hot liquid at same T surrounds bubble with radius=20µm 초기 Bubble 조건이주어진상태에서성장후붕괴되어지는과정을모사 표면온도에서의냉각과팽창으로인한 Bubble 의급냉발생 해석을통해 Droplet 의분출유동양상, 유량, 유속등을확인 2 Bubble 성장후 Moving Obstacle 을이용한 inkjet 해석 Bubble 과의비교를통한액적의분사유동양상확인 해석을통해 Droplet 의분출유동양상, 유량, 유속확인 Moving Obstacle 상하운동에따른 Inkjet 분사

33 MEMS An additional feature available with the improved moving obstacle model is the ability to customize the velocity of each point over its surface. The customization is done through a source code routine available to users called velmov.f. In the simple example shown in this slide, a plate with a circular hole has been given a bending motion. The deformation is assumed to be sinusoidal. Initially the downward motion drives fluid out the opening, but before a droplet is expelled, the plate moves up and sucks the fluid back into the closed chamber. In this example the plate was defined to have a simple, harmonic bending deformation.

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