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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 315 for “"eulerian"”.
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Eulerian-Eulerian Modeling of Fluidized Beds
Fluidized bed reactor technology has been widely adopted within the industry as vital component for numerous manufacturing, power generation and gasification processes due to its enhanced mixing characteristics. Computational modeling of fluidized bed hydrodynamics is a significant challenge that …
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Critical thresholds in Eulerian dynamics
… we study the critical regularity phenomena in Eulerian dynamics, $u_t+u\cdot \nabla u=F(u,D u,\cdots), $ here $F$ represents a general force acting on the flow and by regularity we seek to obtain a large set of sub-critical initial data. We analyze three prototype models, ranging from the …
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Eulerian on Lagrangian Cloth Simulation
<p>This thesis introduces a novel Eulerian-on-Lagrangian (EoL) approach for simulating cloth. This approach allows for the simulation of traditionally difficult cloth scenarios, such as draping and sliding cloth over sharp features like the edge of a table. A traditional Lagrangian approach models …
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Eulerian Video Processing and medical applications
… such as vital signs. Our method, which we call Eulerian Video Processing, takes a standard video sequence as input, and applies spatial decomposition, followed by temporal filtering to the frames. The resulting signals can be visually amplified to reveal hidden information, the process we called …
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Descent Systems, Eulerian Polynomials and Toric Varieties
It is well-known that the Eulerian polynomials, which count permutations in S_n by their number of descents, give the h-polynomial/h-vector of the simple polytopes known as permutohedra, the convex hull of the Sn -orbit for a generic weight in the weight lattice of Sn . Therefore the Eulerian …
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Eulerian-Lagrangian stereo-to-multi-view Conversion
… contribution lies in combining Lagrangian and Eulerian approaches. This allows us to leverage their complementary advantages. The method achieves real-time performance on current GPUs. Its design also enables an easy hardware implementation, demonstrated using a field-programmable gate array.
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Analysis of soil penetrometer using Eulerian finite element method
This thesis investigates the use of an Eulerian Finite Element (EFE) method for modeling penetration in soils. The formulation decouples material and nodal points displacements such that soil flows through a fixed finite element mesh. This approach eliminates problems of mesh distortion associated …
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Viscoelastic Fluid Modeling for Geophysical Applications in an Eulerian Framework
… modeling often favor Lagrangian or mixed Eulerian--Lagrangian frameworks, which can provide high physical fidelity at the cost of increased computational complexity. In this work, we develop viscoelastic models within a fully Eulerian framework, derived from continuum mechanics principles …
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Eulerian Properties of Design Hypergraphs and Hypergraphs with Small Edge Cuts
… hypergraph admits such a walk, then it is called eulerian. Although this notion is one of the progenitors of graph theory --- dating back to the eighteenth century --- treatment of this subject has only begun on hypergraphs in the last decade. Other authors have produced results about rank-2 …
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A Discrete Eulerian Model for Spherical Wave Propagation in Compressible Media
Made available in DSpace on 2014-12-08T23:57:01Z (GMT). No. of bitstreams: 1 6812113.pdf: 3760952 bytes, checksum: 01a5c120fa9762352df31f53eb58f53c (MD5) Previous issue date: 1968
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Acceleration of Eulerian Multi-Material Methods on Highly Parallel Compute Architectures
The aims of this thesis are to develop a framework, which we have named Ripple, for the efficient execution of general purpose computations on modern heterogeneous compute architectures, with a focus on multiple graphics processing units (GPUs), as well as to develop algorithms for the numerical …
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Numerical simulation of friction welding processes: An arbitrary Lagrangian-Eulerian approach
… the simulation accuracy, an arbitrary Lagrangian Eulerian (ALE) formulation for coupled finite strain thermoplasticity is developed and incorporated into the solver, in which the motion of the reference configuration is represented incrementally in terms of a reference velocity field. Thus, the …
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Hybrid Eulerian/Lagrangian 3D methods for high Reynolds number reactive flows
… jet flows through the design of a hybrid Eulerian/Lagrangian and massively parallel 3D numerical simulation tool. The adaptivity of the resulting software yields truly fast and accurate simulations, and a better understanding of the simulated combustion processes. The transverse jet …
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Interfacing hydrodynamic and water quality models with the Eulerian-Lagrangian method
… efficiency, accuracy and flexibility. An Eulerian-Lagrangian type of transport model is proposed for interfacing due to its superior simulation efficiency and numerical resolution in advection dominant flows. Comparisons are made between Eulerian models and Eulerian-Lagrangian models …
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Simulation of hydrodynamics of the jet impingement using Arbitrary Lagrangian Eulerian formulation
… of finite element method, Lagrangian and Eulerian, each has its own benefits and drawbacks. Lagrangian approach has been used widely in solid domains and Eulerian approach has been widely used in fluid fields. Jet impingement problem, due to its unknown free surface and the change in the …
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Airbag simulation utilising Arbitrary Lagrangian Eulerian methodology for Out Of Position cases
… process which utilises the Arbitrary Lagrangian Eulerian (ALE)algorithms, especially in OOP loading cases. This has been carried out using a transientdynamic finite element software package called LS-DYNA. The load cases considered arein accordance with the specific scenarios detailed by the …
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Eulerian modelling and computational fluid dynamics simulation of mono and polydisperse fluidized suspension
This research project is concerned with the Eulerian-Eulerian mathematical modelling of fluidized suspensions. We first derive new averaged equations of motion for particulate systems made up of a finite number of monodisperse particle classes; this clarifies the mathematical origin and physical …
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An Eulerian-Lagrangian finite element method for modeling crack growth in creeping materials
… growth in history-dependent materials. The mixed Eulerian-Lagrangian description (ELD) kinematic model is shown to have several desirable properties for modeling inelastic crack growth. Accordingly, a variational statement based on the ELD for history-dependent materials is developed and a new …
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Simulation of contaminant transport in groundwater systems using Eulerian-Lagrangian localized adjoint methods
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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