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 31 for “"Finite Element Solver"”.
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Adaptation for vortex flows using a 3-D finite element solver
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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A 3-dimensional h-adaptive algorithm for species transport prediction
… self-adaptive algorithms for unstructured finite element grids is recent to the solution of partial differential equations. An h-adaptive grid embedding method is employed to help solve the Navier-Stokes equations for fluid flow and scalar transport; This h-adaptive algorithm, in …
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Digital modeling of 1930 Santos Hernandez classical guitar geometry
… parts, which were then meshed with appropriate finite elements in HyperMesh. This assembled finite element model can be analysed in any finite element solver such as Abaqus to understand the structural and acoustic wonders of such great instruments of the past, which would be very difficult to …
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A DG HWENO scheme for hyperbolic equations
… build a higher order discontinuous Galerkin (DG) finite element solver for the nonlinear Euler equations of gas dynamics, we develop a shock capturing scheme for hyperbolic equations. The Hermite Weighted Essentially Non-Oscillatory (HWENO) methodology introduced by Qiu [10, 14] is used as the …
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Vibration Analysis of a Fan/Compressor Blade
… of compressor/fan blade using three-dimensional finite element analysis together with various analytical approaches. First, the analytical solutions were established using various analytical methods, Bernoulli-Euler, Rayleigh, Rayleigh-Ritz, two-dimensional plate, and Timoshenko beam methods. …
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The development of an all quadrilateral boundary conforming grid generator for high order finite element methods
… the curvature of the geometries. The grid elements on the boundaries conform to the curved structure to support high order accuracy for a finite element scheme. Various geometries are used to test the robustness and generality of the meshing algorithm. The initial problems that were …
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A high-order discontinuous Galerkin multigrid solver for aerodynamic applications
… of a high-order discontinuous Galerkin finite element solver using p-multigrid with line Jacobi smoothing. The line smoothing algorithm is presented for unstructured meshes, and p-multigrid is outlined for the nonlinear Euler equations of gas dynamics. Analysis of 2-D advection shows the …
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Automating radiation damage studies of materials irradiated by high-energy protons using multiphysics simulations
… information is entered into a multiphysics Finite- Element solver. Ultimately, the optimal beam current for which the temperature gradient across a coolant-sample geometry is less than 5 K is predicted. This thesis examines the possibility of automating the entire simulation process so that …
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GPU-accelerated Linear Solvers for High-order Finite Element Methods in Poisson Problems
… linear systems arising from high-order finite element discretizations for Poisson equations often represents the most expensive component of the high-order finite element solver. This dissertation develops and analyzes numerical methods and algorithms aimed at improving the convergence …
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Manufacturing of thermosetting polymers and composites using frontal polymerization: A numerical study
… developing a nonlinear, transient, multiphysics finite element solver. The solver is used to (i) better understand the underlying physics, and (ii) to make a link between the input parameters such as the resin chemistry and the properties of fibers, and the manufacturing process and final …
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Simulations of a passively actuated oscillating airfoil using a discontinuous Galerkin method
… using a high-order Discontinuous Galerkin finite element solver for the compressible Navier Stokes equations. A brief investigation of a simple problem in which pitch and heave of a foil are prescribed highlights the necessity to use an inexpensive lower fidelity model to narrow down the …
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Multiscale modeling of rate dependence and size effects on nanocrystalline metallic thin films
… sensitivity. This work presents a multiscale finite element solver aimed at capturing the effects of grain-level deformation mechanisms and the material microstructure on the macroscopic elastic and plastic behavior of nanocrystalline thin films. The traditional multiscale method is modified …
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Characterization of MnZn ferrite materials and finite element method for MnZn ferrite core loss calculations
… ferrite cores by using a linear and sinusoidal finite element solver based on the material property data (the complex permeability, the dielectric constant, and the AC conductivity) measured in the laboratory. Due to the lack of published material data and fundamental test procedures, this work …
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Design and development of a small-scale 12S-14P outer rotor HEFSM
… modelling. The JMAG-Designer software as finite element solver is used to design and analyse the designed geometry structure. Throughout simulation process, the rotor design with direct drive structure as illustrated in Appendix A is chosen based on optimisation process. Thus, the …
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LS-Dyna for Crashworthiness of Composite Structures
… thesis is aimed at the validation of finite element simulation methods for composite tubes using different failure criteria. The crushing behavior and the effect of post-failure parameters on the composite tubes are studied using a finite element solver, LS-Dyna. Three different …
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Attitude Dynamics of Debris Resulting From Upper Stage Fragmentation in Low Earth Orbit
… solution of Poisson problem and calculated by a finite element solver, defines the density current in the body and thus determines the torque applied on the debris.</p> <p>The results presented here can be used for the analysis of the initial propagation of a cloud of orbital debris resulting …
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Improving programmability and performance for scientific applications
… to best exploit the semantic properties of a finite-element solver. In efforts to address this problem, we explore programming and runtime models which decouple algorithmic complexity, parallelism concerns, and hardware mapping. We build upon these frameworks to exploit domain-specific …
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Development of ABAQUS-MATLAB Interface for Design Optimization using Hybrid Cellular Automata and Comparison with Bidirectional Evolutionary Structural Optimization
… a product. These software have a robust Finite Element Solver and can produce good results. However, these software offers little to no choice to the user when it comes to selecting the type of optimization method used. It is possible to use a programming language like MATLAB to develop …
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Analysis of Thermal Energy Collection from Precast Concrete Roof Assemblies
… is solved using Matlab in conjunction with the finite element solver, Femlab. Using the system model, various non-dimensional design and operating parameters were analyzed to determine a set of near optimal design and operating values. The annual performance of the near optimal system was …
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Nonlinear Finite Element Modeling and Analysis of Metal Hot Forming for Automotive Weight Reduction
… dimensional, multi-stage, large deformation, finite element contact analysis, which considers the effects of thermo-plasticity and austenite decomposition. The developed methodology is applied to the forming process of a transmission clutch hub which is constructed from UHSS 22MnB5 for the …
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