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Cooling Systems Analysis For Plastic Mold Injection Tools, Veronica Flores Quijada
Cooling Systems Analysis For Plastic Mold Injection Tools, Veronica Flores Quijada
Electronic Thesis and Dissertation Repository
The Plastic Injection Mold (PIM) industry has been searching for new technologies that improve the manufacturing of parts by reducing the production time and cost as well as increasing the quality of the product. The cooling systems in the PIM are designed initially to be straight-drilled into the mold, but this manufacturing process has traditionally not been very effective, since for molded parts with complex geometries, the cooling channels are not able to reach certain areas. This limitation has led the industry to develop conformal cooling channels that use the additive manufacturing technology, which allows the cooling channels to conform …
The Development And Numerical Modelling Of A Representative Elemental Volume For Packed Sand, Ashraf Thabet
The Development And Numerical Modelling Of A Representative Elemental Volume For Packed Sand, Ashraf Thabet
Electronic Thesis and Dissertation Repository
The motivation of this thesis is the development of simple microscopic-scale model (representative elemental volume; REV) that can be used to conduct flow and heat transfer simulations from which closure coefficients can be established for the volume-averaged transport equations for porous media (packed bed). The thesis provides a brief introduction to the computational technique adopted for the geometric generation of the REV (YADE), followed by a parametric study undertaken to reveal the minimum number of particles inside the REV that are required to mimic the appropriate physics. Additional analysis was conducted with the goal of determining the influence of deviation …
A Cfd Assisted Control System Design For Supercritical Water Cooled Reactor, Rohit V. Maitri
A Cfd Assisted Control System Design For Supercritical Water Cooled Reactor, Rohit V. Maitri
Electronic Thesis and Dissertation Repository
In this study, the methodology to construct a control system based on computational fluid dynamics (CFD) simulations is developed for supercritical water cooled reactor (SCWR). The CFD model using Reynolds Stress Model (RSM) and k-w SST model is validated with the experimental cases of steady state and vertically up flowing supercritical water in circular tubes for normal heat transfer and deteriorated heat transfer (DHT) cases. This model is extended to simulate the transient thermal-hydraulic behaviour of supercritical fluid flow and heat transfer, and the results are also compared with the 1-D numerical model, THRUST. The DHT phenomenon is investigated using …