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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Simulation of Three Dimensional Liquid-Sloshing Models using C++ Open Source Code CFD Software) ผู้เขียน: เอกชัย ชัยชนะศิริ,  นายชาคริต สุวรรณจำรัส, อาจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe open source computational fl uid dynamic (CFD) codes—open fi eld operation and manipulation (OpenFOAM)—were developed to simulate the three dimensional sloshing of liquid inside moving rectangular tanks. Equations governing the two-phases of fl uid were used in these simulations and the Volume of Fluid method was used to capture the free surface of the liquid sloshing. The fi nite volume method was used to solve these problems. The solutions of the simulations were validated using experiment results based on the free surface height and the pressure developed on the wall of the tanks. It was found that the average error of the surface height and the pressure obtained from the simulations were 2.33% and 6.65%, respectively. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Study of Sloshing of Viscous Liquid in Containers Using Finite Element Method) ผู้เขียน:Noppadol Chaimanatsakun, ดร.ธำรงค์ พุทธาพิทักษ์ผล, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractSevere liquid sloshing in moving partially-filled liquid containers following a sudden halt can generate enormous liquid pressure which can lead to vehicle accidents or damage to their internal structures. Many researchers have focused on studies of flow characteristics during the sloshing period using the fluid-structure interaction algorithm implemented in finite element analysis. The current research extended previous work to distinguish inviscid-flow models from viscous-flow models in simulations of liquid sloshing inside containers. Finite element models of water containers were developed consisting of containers with and without a water baffle. The water-filled capacities were set at 40, 60 and 80%. This research focused on analyses of surface waves, pressure waves and stress distribution on containers.When comparing inviscid-flow models to viscous-flow models at the same water-filled capacity, quite similar results were found in the shape of surface waves, maximum wave heights and the duration of occurrence of the peak von Mises stress. Nonetheless, inviscid-flow models had higher von Mises stress on the container surfaces than viscous-flow models. At 40% water-filled capacity, the water pressure randomly oscillated over time so that the peak water pressure could not be identified. The water baffle helped to minimize water pressures, heights of surface waves and von Mises stress on the container surfaces especially at 60 and 80% water-filled capacity. |
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