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 25 for “"Flux Boundary"”.
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Convection from manufactured ice roughness with varying flux boundary conditions.
… transfer for ice roughness with constant thermal boundary conditions. This work investigates the effect of variable heat flux boundary conditions on convective heat transfer, and improves upon the techniques used to obtain convective heat transfer measurements for realistic ice roughness patterns.
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Transient nonlinear heat transfer analysis using the finite element method in the context of the requirements of thermal analysis in a mine
… solids which may have prescribed temperature and flux boundary conditions. The program has been extended using the requirements for modelling heat transfer in mines as a guide. The theory of conduction, thermal radiation, convection and heat transfer due to evaporation and condensation is …
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Αναλυτική επίλυση μη γραμμικών προβλημάτων διήθησης
… ABSORPTION IN UNSATURATED SOILS WITH CONSTANT FLUX BOUNDARY CONDITION. THE GENERAL DIFFERENTIAL EQUATION OF THE ONE DIMENSIONAL UNSATURATED FLOW IS FORMED HAVING THE FLUX AS DEPENDENT VARIABLE WHILE THE TIME T AND THE MOISTURE Θ ARE THE INDEPENDENT VARIABLES. SIMPLE APPROXIMATE ANALYTICAL …
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Novel applications of diffusion-driven flow
… in a density stratified fluid and the no-flux boundary condition that must be obeyed on impermeable boundaries that are sloping with respect to gravity. This conflict results in a boundary layer flow, and in this thesis we present two novel applications of diffusion-driven flow. First, it …
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Impacts of double-diffusive processes on the thermohaline circulation
… has been done under three types of surface boundary conditions. (a) Under "relaxation" conditions, there is a two-thirds power law dependence of the meridional overturning rate (and the poleward heat transport) on the diapycnal diffusivity. For any given external forcing, there is only one …
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Impacts of double-diffusive processes on the thermohaline circulation
… has been done under three types of surface boundary conditions. (a) Under "relaxation" conditions, there is a two-thirds power law dependence of the meridional overturning rate (and the poleward heat transport) on the diapycnal diffusivity. For any given external forcing, there is only one …
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Development of an Advanced Stem Heating Model
… approximate fashion. Simulation with a surface flux boundary condition requires that these phenomena be accounted for. Previous models have used temperature-time boundary conditions, which prevents them from being directly coupled to fire behavior models. This model uses a flux-time profile for …
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Spatial spread of infectious diseases
… SI and SIR models are supplemented with no flux boundary conditions to insure meaningful comparison of the populations predictions. In addition, we use a one dimensional spatial domain for computational simplicity. The comparison of the SI (and SIR) model with its diffusive counterpart is …
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Lagrangian simulation of transverse jets with a distribution-based diffusion scheme
… jets. An improved formulation of the vorticity flux boundary conditions is rigorously derived.
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Computations of Flow Structures and Heat Transfer in a Dimpled Channel at Low to Moderate Reynolds Number
… conditions were assumed and a constant heat flux boundary condition was applied to the walls of the channel. In the laminar regime, the flow and heat transfer characteristics are dominated by the recirculation zones in the dimple with resulting augmentation ratios below unity. Flow transition …
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The solar corona: modeled, discretized, visualized
… can be prescribed or generated from magnetic flux surface maps given as scalar magnetic flux boundary data on the sun's surface. Subsequently, the shape of the filaments is determined based on a variational formulation. Lastly, we apply the entire model to output visual renderings of the whole …
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Vorticity structure and evolution in a transverse jet with new algorithms for scalable particle simulation
… scales. A novel formulation of the vorticity flux boundary conditions rigorously accounts for the interaction of channel vorticity with the jet boundary layer. This formulation yields analytical expressions for vortex lines in near field of the jet and suggests effective modes of unsteady …
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Optimal experimental designs for the estimation of thermal properties of composite materials
… experimental designs were optimized. A heat flux boundary condition is required in both analyses for the simultaneous estimation of the thermal properties. For the one-dimensional experiment, the parameters optimized were the heating time of the applied heat flux, the temperature sensor …
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Low-grade Thermal Energy Harvesting and Waste Heat Recovery
… under realistic conditions such as constant heat flux boundary condition and high thermally resistive environment. These advancements in thermal energy harvesting and waste heat recovery technology will have a transformative impact on renewable energy generation and in reducing global warming.
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Developmental models with cell surface receptor densities defining morphological position
… form of reaction-diffusion equations with zero flux boundary conditions coupled with ordinary differential equations. Two mechanisms of pattern formation: diffusion driven instability and hysteresis-driven mechanism are studied and their possibilities and constraints in explanation of different …
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Mathematical methods for the modelling of cell migration and chemotaxis
… equations on an evolving curve boundary and is subsequently used to derive the concentrations of various chemicals which lay on the model of the cell's membrane. The cell migration model is also extended to higher dimensions using a second ALE-FEM scheme which couples the …
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Heat Transfer and Flow Measurements on a One-Scale Gas Turbine Can Combustor Model
… peak region was established. Constant-heat-flux boundary condition was established using two identical surface heaters, and the Infrared Thermal Imaging system was used to capture the real-time steady-state temperature distribution at the combustor liner wall. Analysis on the flow …
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Metabolic engineering of microorganisms for the overproduction of fatty acids
… computationally driven predictions and metabolic flux analysis (MFA) was demonstrated to meet this challenge. With wild type E. coli fluxomic data, the OptForce procedure was employed to suggest genetic manipulations for fatty acid overproduction. In accordance with the OptForce prioritization of …
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Experimental and Numerical Investigation of Turbulent Heat Transfer due to Rectangular Impinging Jets
… stainless-steel foil was utilized to obtain iso-flux boundary conditions on the impingement surface. The target plate was free to translate in the lateral direction and the heat transfer distributions were determined at 0 ≤ x/W ≤ 20 with the micro-thermocouples placed underneath the foil. The …
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Investigation of Fouling in Wavy-Fin Exhaust Gas Recirculators
… design for various Reynolds numbers and thermal boundary conditions. Constant heat flux boundary condition is used in the periodic fully-developed calculations, which assist in establishing various deposition trends. The wavy nature of the walls is noted to affect the fouling process, resulting …
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