| Title |
Study on Measurement and Numerical Analysis for Fluid Flow past a Circular Cylinder in Rectangular Duct |
| Keywords |
Rectangular duct ; 사각덕트 ; Circular cylinder ; 원형 실린더 ; Fluid flow ; 유체유동 ; Laser doppler velocity meter ; 레이저 도플러 유속계 ; 3-D numerical computation ; 3차원 수치계산 |
| Abstract |
Flow characteristics of turbulent steady fluid flow past a cylinder in rectangular duct are measured by 5W laser doppler velocity meter. The fluid flow is also computed by commercial software of STAR-CD for comparison between the measurement and computation. The turbulent models applied in the computations are standard K-epsilon model, RNG K- epsilon model and Chen K-epsilon model. Acurracy of standard K-epsilon model is a little bit better than acurracies of other models even though those models have almost the same order of error compared to measured data. The computations predict satisfactorily the measured velocity profiles at middle section of the circular cylinder before the fluid flow diverges. However, there are some disagreements between them at down stream from the circular cylinder. |