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- 저자 : 손소연(S.Y. Son) (검색결과 3 건)
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수정된 CIP방법을 이용한 벽면 충돌 후 액적의 퍼짐 현상에 대한 수치해석 연구
손소연(S.Y. Son),고권현(G.H. Ko),이성혁(S.H. LEE),유홍선(H.S. Ryou) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
Interface tracking of two phase is significant to analyze multi-phase phenomena. The VOF(Volume of Fluid) and level set are well known interface tracking method. However, they have limitations to solve compressible flow and incompressible flow at the same time. CIP(Cubic Interpolate Propagation) method is appropriate for considering compressible and incompressible flow at once by solving the governing equation which is divided up into advection and non-advection term. In this article, we analyze the droplet impingement according to various We number using improved CIP method which treats nonlinear term once more comparison with original CIP method. Furthermore, we compare spread radius after droplet impingement on the wall with the experimental data and original CIP method. The result using improved CIP method shows the better result of the experiments, comparison with result of original CIP method, and it reduces the mass conservation error which is generated in the numerical analysis comparison with original CIP method.
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수정된 CIP 방법을 이용한 벽면 충돌 후 액적의 퍼짐 현상에 대한 수치해석 연구
손소연(S.Y. Son),고권현(G.H. Ko),이성혁(S.H. Lee),유홍선(H.S. Ryou) 한국전산유체공학회 2010 한국전산유체공학회지 Vol.15 No.4
Interface tracking of two phase is significant to analyze multi-phase phenomena. The VOF(Volume of Fluid) and level set are well known interface tracking method. However, they have limitations to solve compressible flow and incompressible flow at the same time. ClP(Cubic Interpolate Propagation) method is appropriate for considering compressible and incompressible flow at once by solving the governing equation which is divided up into advection and non-advection term. In this article, we analyze the droplet impingement according to various We number using improved ClP method which treats nonlinear term once more comparison with original ClP method. Furthermore, we compare spread radius after droplet impingement on the wall with the experimental data and original ClP method. The result using improved ClP method shows the better result of the experiments, comparison with result of original ClP method, and it reduces the mass conservation error which is generated in the numerical analysis comparison with original ClP method.
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열전달을 수반하는 액적의 퍼짐 현상에 대한 수치해석 연구
손소연(S.Y. SON),고권현(G.H. KO),유홍선(H.S. RYOU) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
Contact angle is significant parameter to simulate droplet spreading after impingement on the wall because it is based on analysis of surface tension that is important term in the momentum equation. In almost numerical approaches, it is implemented in the boundary condition as constant value. However, contact angle has various values as different time and contact line velocities. In this paper, the simulation of droplet spreading on the heated surface is presented and both static contact angle and dynamic contact angle which is function of contact line velocities and time are considered as boundary condition to calculate surface tension. Newly modeled function which is obtained the experiment of single droplet spreading and impingement on the flat bare wall is used for dynamic contact angle. The VOF (Volume of Fluid) method which is one of the most famous interface tracking methods and CSF (Continuum Surface Force) model are used for calculation of interface between two phases. Overall, in the numerical result of droplet spreading and impingement on the heated surface, the heat exchange (flux) is affected by contact angles. Furthermore, this heat exchange affects the dynamics of droplet. The larger Weber number shows larger heat exchange between droplet and surface, larger droplet spreading radius and lower spreading height.
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