표제지
목차
국문초록 7
Abstract 8
Chapter 1. 서론 (introduction) 12
1.1. 연구의 배경 및 목표 12
Chapter 2. 이론적 배경 (Background) 15
2.1. Si-O 열역학 계산(Thermodynamics in the Si-O system) 15
2.2. 낙하궤도 계산 18
Chapter 3. 수치해석 기법 23
3.1. 지배 방정식 23
3.2. 난류 모델 24
3.3. 복사 모델 25
3.4. 다상 유동 27
3.5. 응고 모델 29
Chapter 4. 실험 방법 30
4.1. SiO₂ 펠릿 장입 실험 30
4.2. 수치해석 형상 및 조건 35
Chapter 5. 실험 결과 40
5.1. 낙하궤적 해석 및 실험 결과 비교 40
5.2. 비정상 상태 용융 해석 45
5.3. 히터 배열 조건에 따른 온도 및 유동 해석 48
5.3.1. 20mm 조건 해석 결과 48
5.3.2. 50mm 조건 해석 결과 53
5.3.3. 낙하 위치 별 해석 결과 55
Chapter 6. 결론 58
참고문헌 60
Table. 1. State of liquid and solid. 37
Table. 2. UDF code. 38
Table. 3. Heater calculation variables. 39
Fig. 1. Calculated Si-O phase diagram showing the gas phase equilibria at (a) 760 torr and (b) 1 torr. 16
Fig. 2. The gas phase composition as a function of temperature during the Reaction between Si and SiO₂. 17
Fig. 3. Schematic diagram of crucible. 20
Fig. 4. Schematic of measuring method of interaction coefficient, restitution of particle to wall. 21
Fig. 5. Schematic of incident angle ( ) and reflection angle (θ₂). 22
Fig. 6. Schematic diagram of radiation transfer. 26
Fig. 7. The fraction of liquid volume in VOF method: (a) =1 (b) 0<ψ<1 (c) ψ=0[이미지참조] 28
Fig. 8. Experimental equipment (a) side view, (b) front view and (c) schematic. 32
Fig. 9. half region reflector (a) 30°, (b) 45°, (c) 60°. 33
Fig. 10. Conical shape reflector (a) 45°, (b) 52°, (c) 60°. 34
Fig. 11. Theoretical calculation fall trajectory (a) 30°, (b) 45°, (c) 52° (d) 60°. 42
Fig. 12. Half reflector trajectory experiment results (a) 30°, (b) 45°, (c) 60°. 43
Fig. 13. Conical shape reflector trajectory experiment results (a) 45°, (b) 52°, (c) 60°. 44
Fig. 14. result of analysis 20mm condition melting time (a) no molten Si, (b) in molten Si. 46
Fig. 15. result of analysis 50mm condition melting time (a) no molten Si, (b) in molten Si. 47
Fig. 16. Numerical analysis results 20mm. 51
Fig. 17. Velocity vectors and temperature distribution 20mm. 52
Fig. 18. Velocity vectors and temperature distribution 50mm. 54
Fig. 19. Temperature and velocity vector distribution by angle of 20mm conditional reflector. 56
Fig. 20. Temperature and velocity vector distribution by angle of 50mm conditional reflector. 57