Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"dynamic mesh"”.
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Numerical Analysis of Gun Barrel Pressure Blast Using Dynamic Mesh Adaption
<p>A Computational Fluid Dynamics (CFD) method has been applied to simulate the pressure blast of the projectile which is launched from a barrel and to investigate the pressure distribution and sound pressure level (dB) along different positions away from the gun axis and towards the fuselage of …
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Dynamic mesh adaption for supersonic combustion waves modeled with detailed reaction mechanisms
Dynamic mesh adaption has emerged as a powerful tool to reduce the <br>numerical cost of CFD problems. We use this technique to resolve the <br>disparate physical scales of reactive flow problems. <br>In our numerical scheme, we combine the dynamic mesh adaption with <br>an explicit as well as …
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Design of hybrid optio-vision tracking system with active RFID
… Current Active RFID technologies focus on dynamic mesh networks with complex functionality on the tag side. Accuracy of is at best a few meters. A proposed design uses a simpler RSSI model suggest a dynamic positioned antenna to enhance the accuracy of simple star-shape networks. The design …
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Collaborative internet and voice data transfer using bluetooth mesh networking
… of a secondary medium over an ad-hoc mesh network, resilient to the erratic movements of the mobile nodes from which it is comprised. We suggest improvements to the Bluetooth discovery algorithm, making use of a quantized hop velocity space to lower the probability of two devices …
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Numerical simulation of green water and resulting loads
… computers and advances in computational fluid dynamics, numerical simulations are carried out for forecasting and analysing nonlinear fluid motions and resulting loads as well as physical experiments. Therefore, taking full advantages of advances in numerical modelling and combining model tests …
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Adjustable Energy Saving Device for Transom Stern Hulls
… a numerical investigation about the hydrodynamic characteristics of a transom mounted interceptor on the Oliver Hazard Perry class frigate (FFG-7), in order to assess the potential of propulsion power reduction in a wide range of speeds. This study is aimed to design a stern interceptor …
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Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form
In this research, hydrodynamic analysis, verification and validation will be performed on Generic Prismatic Planing Hull (GPPH) using OpenFOAM v1806 solver interFoam. The numerical simulation will be compared with the experimental result, which is a new set of high-quality experimental tests …
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Adaptive secure network model for dynamic wireless mesh network
… levels of security. One possible solution is a dynamic distributed wireless mesh network as it provides all the features of a traditional network along with the flexibility of wireless communication and an infrastructure less distributed setup. The network can be created by connecting mobile or …
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Computational Investigation of Ethanol and Bifuel Feasibility in Solstice Engine
… a GDI engine. ANSYS Workbench is used to build a dynamic mesh of the varying compression ratio models, in conjunction with SolidWorks modeling software. To simulate flow physics, fuel injection, and combustion in the engine, ANSYS Fluent is employed. A parametric study of the effect of spark …
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Transient Computational Fluid Dynamic Modeling of Baffled Tube Ram Accelerator
Transient computational fluid dynamic modeling in laboratory frame of reference was used to investigate baffled tube ram accelerator operating characteristics in inert and reactive mixtures. The minimum entrance Mach number that allowed supersonic projectile transit through a baffled tube filled …
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Nonlinear Dynamics and Vibration of Gear and Bearing Systems using A Finite Element/Contact Mechanics Model and A Hybrid Analytical-Computational Model
This work investigates the dynamics and vibration in gear systems, including spur and helical gear pairs, idler gear trains, and planetary gears. The spur gear pairs are analyzed using a finite element/contact mechanics (FE/CM) model. A hybrid analytical-computational (HAC) model is proposed for …
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Ram air turbine enhancement for auxiliary power unit replacement
… simulate the actual turbine operation, the dynamic mesh and user define function (UDF) were used to revolve the rotor turbine via wind. This study was performed in two stages. The first stage was conducted to evaluate the power produced from a single-rotor RAT. Three RATs were required to …
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High–fidelity numerical modelling of ocean wave energy converters
… wave tanks based on computational fluid dynamics can capture all relevant hydrodynamic non–linearities and produce high resolution data sets, but require substantially more computational resources. Reviewing the available literature of high–fidelity numerical modelling of wave energy …
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On the role of topology and micro-structure on the adhesion and fracture of soft materials
… only a fraction of the network nodes is solved. Dynamic mesh adaptivity enables transition between the two representations. The method enables accurate modeling of crack initiation and propagation without apriori constraint on the fracture energy. The accuracy and computational efficiency of the …
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Parametric Study on a Novel Waste Heat Recovery System
… The model coupled the Mixture model and the Dynamic Mesh model via developed user-defined functions. However, due to the limitations of the CFD software, the investigations were restricted to the fundamental heat transfer and phase-change processes in the lower vessel and the associated heat …
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A CFD study of fluid-structure interaction problems for floating offshore wind turbines
… OpenFOAM to accurately solve wind turbine aerodynamics and floating platform hydrodynamics, and utilises the open source MBD code MBDyn for structural dynamics within a multibody framework while modelling flexible bodies based on a nonlinear beam theory. Coupling of these two solvers is …
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Modeling transient multiphase flow and mold top surface behavior in steel continuous casting
… insights into the inter-related multiphase fluid dynamics in the caster mold during both quasi-steady-state and essentially transient events in practical casting operations. Argon gas commonly is injected into the liquid metal stream through porous refractory walls in many metallurgical processes. …
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Numerical and Experimental Analysis of a TurboPiston Pump
… as the flapper valve. Means to improve the hydrodynamic performance of both valves have been identified for future study.
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Analysis of complex flows in safety valves using CFD
… this thesis was to utilise Computational Fluid Dynamics (CFD) tools available to industry - primarily ANSYS FLUENT and ANSYS Workbench - to develop a modelling methodology which could allow CFD to be relied upon and be used as an analysis/design tool within the Pressure Relief Valve (PRV) …
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Experimental and numerical studies on oil spilling from damaged oil tankers
… or assumptions may not stand in the complex dynamic spilling process in the real spilling accident. This study brings a step further on the knowledge of oil spilling from a damaged tank by combining experimental and numerical investigations, with a focus on the dynamic spilling process from …
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