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.
Results
Showing 1 to 19 of 19 for “"Cylinder model"”.
-
Ram pressure correlations for aspirated cylinders
… The investigation utilized an aspirated cylinder in cross-flow as an idealized representation of an automobile front end with grille openings. The pressure distribution on the upstream side of the cylinder model includes a stagnation point and a significant surface pressure gradient …
-
Computational Modeling of the Helical Axis in the Human Knee--Detecting Changes in the Transverse Plane
… algorithm was designed and tested using three models: a multiplanar rigid body model, a mathematical model, and a cylinder model. The multiplanar rigid body model closely mimics knee movement without supporting ligamentous structures, thus the movement was unconstrained. In this model kinematic …
-
A micromechanics-based method for off-axis strength prediction of unidirectional laminae - Approach for a nonlinear rubber based lamina
… a local stress analysis based on a concentric cylinder model. This model consists of a unique fiber embedded in matrix; both constituents are represented by cylinders. A finite element model is also constructed and the results of the two models compared. The stresses and strains from the …
-
Parameter Estimation for a Modified Cable Model Using a Green's Function and Eigenvalue Perturbation.
… the Green's Function for a tapered equivalent cylinder model of dendritic electrical propagation. We then use the Green's Function to develop a Carleman linear embedding scheme which is used to estimate the effects of a nonlinear ion channel hot-spot on the tapered cylinder solution. …
-
Development of a two-dimensional model of blood microcirculation flows
… of a dimensionless blood microcirculation model for the study of blood microcirculation flows. It is a two dimensional, axially symmetric, incompressible, Newtonian-flow, Krogh cylinder model subjected to axially periodic boundary conditions. This model formulation allows for the use of the …
-
Asymmetric Energy Harvesting and Hydraulically Interconnected Suspension: Modeling and Validations
… and vehicle dynamics performance. A single cylinder model is built in AMESim for preliminary study and validated in a bench test. The bench test results proved the authenticity of the theoretical model, and the model is then used to predict the system performance and guide the hardware …
-
Penetration of Surfactant Solutions into Capillaries
… from Lucas-Washburn behaviour. Three theoretical models were compared to the experimental data: (I) The Lucas-Washburn model, (II) A “Young” model and (III) Overflowing cylinder model. All these models are shown to be unable to account for the observed penetration rates. The wedge of liquid near …
-
Model-based cardiac CT segmentation and 3D heart reconstruction
… this work is to obtain a volumetric hepatic vein model from the abdominal CT for liver transplant operation. To solve this problem, this thesis proposes a fast marching method driven by Gaussian mixture models (GMM) to segment hepatic vein from CT images. Anisotropic smoothing is applied to the …
-
Modern electromagnetic scattering
… for wave scattering from a large host cylinder containing N eccentrically embedded core cylinders. The SCV approximation is developed via separation of variables and a cluster T-matrix. We establish the limitations of the SCV approximation and it is in good agreement with the …
-
Conceptual evaluation of hydrogen hybrid combustion for heavy-duty engines using CFD modelling
… available software Siemens Star CCM+ with the In-Cylinder add-on and a complex chemistry combustion model. Multiple pre-chamber geometries were evaluated, focusing on parameters such as the number and flow area of pre-chamber nozzles, pre-chamber volume, and the implementation of a dual injector …
-
Mechanical properties of bio-absorbable materials
… considered in our study. NDSANDS a concentric cylinder model computer software, was used to evaluate the stiffness and strength of the bioabsorbable composites with unidirectional fiber orientation. To achieve a better physical understanding, the NDSANDS predictions were also compared with …
-
Swimming at low Reynolds number slip boundaries and interacting filaments
… fluids. I propose a waving sheet and a waving cylinder model to demonstrate a possible enhancement of swimming by such slip effect. The results are in good agreement with previous experimental and numerical studies. In subsequent work, I extend the classical slender-body theory to replace the …
-
Studies on hydration water dynamics and microstructure of synthetic cement
… the cement QENS data, we developed a new global model which is numerically more stable than previous models for cement QENS analysis. With this model, we can correctly quantify the structural water index (SWI) and the confining radius. We also established the relation between the constrained to …
-
Measurements of entropy-layer instabilities over cone-ogive-cylinders at Mach 6
… and hot-wire anemometry. A long cone-ogive-cylinder model with interchangeable cone-ogive noses was used to generate the shock curvature that resulted in an entropy layer conducive to instability growth. The nosetip angles of the cone-ogive range from 25 to 40 degrees, with a majority of the …
-
CFRP Prestressed Concrete Exposed to Moisture
… contrary to the prediction of the thick-walled cylinder model, but possibly caused an increase in the CFRP-concrete radial contact pressure. The imposition of sustained bending stresses on wet CFRP rods was found to cause premature failure, believed to be a result of matrix softening and …
-
Breitenabhängigkeit des Reynolds-Tensors : numerische Simulationen und Vergleich mit der Sonne
… vereinfachte geometrische und physikalische Modelle der Konvektionszone entwickelt. Die Navier - Stokes - Gleichungen für ein kompressibles Medium wurden mittels eines im Verlauf der Dissertation entwickelten Programmpakets numerisch gelöst. <br> <br>Die vorgestellten Simulationen und deren …
-
Thermo-elastic-plastic analysis for elastic component under high temperature fatigue crack growth rate.
… analysis between the theoretical and numerical modelling, incorporating research findings under isothermal fatigue loading for solid cylindrical specimen and the theoretical modelling with the numerical simulation for tubular specimen when subjected to cyclic mechanical loading superimposed by …
-
Multiscale Modeling of the Effects of Nanoscale Load Transfer on the Effective Elastic Properties of Carbon Nanotube-Polymer Nanocomposites
A multiscale model is proposed to study the influence of interfacial interactions at the nanoscale in carbon nanotube(CNT)-polymer nanocomposites on the macroscale bulk elastic material properties. The efficiency of CNT reinforcement in terms of interfacial load transferring is assessed for the …
-
Structural Analysis of Cylindrical Particles by Small Angle X-ray Scattering
… X-ray scattering (SAXS). Three systems with cylinder-shaped particles: (1) Laponite particles in aqueous solutions, (2) Poly(carbon suboxide) particles in binary water/DMF solutions, and (3) Suprastructural aggregates of coil-ring-coil block copolymers in cyclohexane, have been studied by …