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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Analysis of Fluid-Structure Interaction Effects of Liquid-Filled Container under Drop Testing) ผู้เขียน: นายชาคริต สุวรรณจำรัส, อาจารย์ , ดร.ธำรงค์ พุทธาพิทักษ์ผล, รองศาสตราจารย์,  สัจจาทิพย์ ทัศนียพันธุ์ สื่อสิ่งพิมพ์:pdf AbstractAn analysis of drop-impact test for plastic containers is a first step toward the simulation of impact events for design and development purposes. Computer methods based on finite element analysis (FEA) were able to predict the performance of liquid-filled plastic containers to withstand drop-impact loading without rupture. This paper presented results of finite element analysis studied drop-test of liquid-filled plastic bottles. The aim of this study was to determine the accuracy of a non-linear explicit FE code in the MSC.Dytran program, by comparing FEA results to experiments. This paper is to lay down the effective procedures for analyzing the drop-test using FEA, which are appropriate for the design and development of plastic containers. |
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. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Determination of Drop-Impact Resistance of Plastic Bottles using Computer Aided Engineering) ผู้เขียน:นายชาคริต สุวรรณจำรัส, อาจารย์, ดร.ธำรงค์ พุทธาพิทักษ์ผล, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractASTM D2463 discusses the standard test method for drop impact resistance of blow-molded thermoplastic containers using procedures to determine the mean failure height and the standard deviation of the distribution. Unfortunately, costly prototypes have to be created before the drop impact test can be conducted. The MSC Dytran program was used with finite element simulation of the drop impact test of plastic bottles to determine the failure height for polyethylene terephthalate (PET) and high density polyethylene (HDPE) bottles. The finite element results were verified using experimental results obtained using the test method prescribed in ASTM D2463. It was found that the finite element simulation obtained accurate results. The failure heights for the PET and HDPE bottles were 4.53 ? 0.41 m and 4.65 ? 0.81 m, respectively. The errors in the failure height obtained from the FE simulation were less than 9.27% for the PET bottle and 5.59% for the HDPE bottle. |
 ที่มา:สำนักงานกองทุนสนับสนุนการวิจัยหัวเรื่อง:เครื่องมือวัดการเคลื่อนที่ของผิวของเหลวภายในภาชนะบรรจุของเหลวที่ถูกกระตุ้น หัวหน้าโครงการ:นายชาคริต สุวรรณจำรัส, อาจารย์ |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Diffusion Jet Flame Models Using Open Source Code CFD Software) ผู้เขียน:นายชาคริต สุวรรณจำรัส, อาจารย์, Panya Aroonjarattham สื่อสิ่งพิมพ์:pdf AbstractOpen-source code software (OpenFOAM) based on computational fluid dynamics (CFD) was implemented and applied to simulate the diffusion of a jet flame. The large eddy simulation (LES) of the turbulence combustion model was written using the C++ language. The mixture fraction approach, an infinitely-fast chemistry assumption and radiative heat transfer were combined with this LES model. The finite volume method was performed to solve and simulate diffusion jet flame models under varying methane flow rates and environmental pressures. The results of the jet flame simulation comprising the percentage of maximum burning temperature, the heat release rate and oxygen from the oxygen fraction were defined to be the flame shape for validation with experiments. It was found that the flame length measured using the heat release rate from the results of simulations had the best agreement with the experiments. An average error of less than 5.84% was obtained by a comparison between the developed CFD model and the experiment when the CFD flame length was depicted by the heat release rate. |
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