| Title |
Analysis of the Applicability of Parameter Estimation Methods for a Stochastic Rainfall Model |
| Authors |
조현곤(Cho, HyunGon) ; 김광섭(Kim, GwangSeob) ; 이재응(Yi, JaeEung) |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.4.1105 |
| Keywords |
추계학적 강우모형;매개변수 산정;Nelder-Mead 기법 Stochastic rainfall model;Neyman-Scott rectangular pulse model;Parameter estimation;Nelder-Mead method |
| Abstract |
This study utilised Computational Fluid Dynamics(CFD) for preliminary assessment of mixing efficiencies of 2-phase fluids in a pipe at which a slurry flow and an injected solidifier join, for the purposes of reducing trial-and-error-based instances of physical experiments and conducting the overall research in an economical way. Using OpenFOAM$^{(R)}$, we simulated behavior of 3-phase fluids under 18 different settings generated by changing diameters of a dredged soil transportation pipe, a quality improving material injection pipe and the confluence angle. While difference in mixing efficiencies amongst the instances was insignificant, discernible boundary layers amongst the materials were observed in all of the instances. In order to break the boundary layers, we designed a substructure inside a pipe and found out that it could remarkably improve mixing efficiencies particularly for short distance applications. |