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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 25 for “"thermo-fluid"”.
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A Computational Study of Thermo-Fluid Dynamics of Pulse Detonation Engines
… this thesis is to use a transient Computational Fluid Dynamics computer code written in FORTRAN 90 for full reaction kinetics, to perform an analysis of the physical processes and chemical phenomena occurring on a single cycle of an ideal Pulse Detonation Engine (PDE) using a stoichiometric …
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Numerical Simulations of Thermo-Fluid Phenomena in Microwave Heated Packed and Fluidized Beds
… within the material.In recent years packed and fluidized beds have been used as chemical reactors to achieve various tasks in industry.Recent studies have shown that microwave heating offers the potential to heat the bed particles to a higher temperature than that of the fluid.This results in …
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Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting
… includes transient heat transfer, multi-phase fluid flow, solidification of the slag, and movement of the mold during an oscillation cycle. First, the model is applied to a lab experiment done with a “mold simulator” to verify the transient temperature-field predictions. Next, the model is …
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Thermo-fluid model of meniscus behavior and oscillation mark formation in steel continuous casting
DSpace SAF Submission Ingestion Package generated from Vireo submission #11078 on 2017-08-10 at 15:07:08
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Using control surfaces to evaluate weighting coefficients for fast thermo-fluid reduced-order-modelling strategies
… Therefore, there is a pressing need for fast thermo-fluid modelling capabilities, and moreover there is a desire to incorporate such practices early in design. Incorporating Reduced Order Models (ROMs) alongside existing Computational Fluid Dynamics (CFD) simulation has been touted as a …
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Vertex-based discretisation methods for thermo-fluid flow in a finite volume-unstructured mesh context
… vertex-based FV algorithm for the solution of thermo- fluid flow problems has been developed and integrated within a multi-physics FV framework PHYSICA. Currently PHYSICA employs a cell-centred discretisation technique for fluid mechanics problems and a vertex-based discretisation technique for …
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Investigation of meniscus region behavior and oscillation mark formation in steel continuous casting using a transient thermo-fluid model
… region, which includes transient multiphase fluid flow of slag and steel, with low-Reynolds turbulence, heat transfer in the mold, slag, and steel, steel shell solidification, mold oscillation, and temperature-dependent properties. This model was first validated using previous experimental …
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Algorithm and Design Tool Development of Sizing a Stand-Alone Pv/Wt/Electrolyzer/Hydrogen/Fuelcell Power Generation System for Electricity Supply Under Weatherrelated Uncertainty Considerations and Thermo-Fluid Effects
Today, reducing the greenhouse gas emissions and decentralizing the electrical power plantshas become a worldwide target, which, in turns, helps in avoiding causing any damage to the environment and increasing and easing the accessibility to the network, respectively, especially at remote areas. …
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Nonlinear observer design using contraction theory with application to heat exchangers having varying phase transition
Thermo-fluid systems such as air conditioning and refrigeration systems are widely used in residential, commercial, and industrial applications. By the end of the 20th century, nearly 70 percent of U.S. households had air conditioning, and 99.5 percent had at least one refrigerator. Advanced …
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State space modeling of differential-algebraic systems using singularly perturbed sliding manifolds
… is well suited for object oriented modeling of thermo-fluid systems. In this approach, differential equations are used to describe the evolution of subsystem states and algebraic equations are used to define the interconnections between the subsystems (boundary conditions). Algebraic constraints …
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Peridynamic modeling of fire damage in composites
… reality problem can be simplified as a thermal fluid-structure interaction problem in terms of mathematical modelling. The thermo-fluid model is used to simplify the physical properties of fire. The classical continuum mechanics has difficulty in predicting crack propagations because of the …
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Integrated process and control modelling of water recirculation in once-through boilers during low load and transient operation
… Such tools enable a better understanding of the thermo-fluid processes and their dynamics, which improves the ability to specify and design better control algorithms and systems. During low load operation and transients, such as start-up and shutdown, the required water flow rate through the …
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Parametric Study on a Novel Waste Heat Recovery System
… model) that will allow to simulate the thermo-fluid processes in various system components and to use this numerical model to study the heat transfer and phase-change processes along with the work interactions. In the first part of this study, a novel numerical model was developed using …
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A thermal-fluid analysis of piping dead-legs in high purity water systems
… distribution loops are commonly used to divert fluid flow at take-off points. However fluid flow restriction at teesection branches can cause piping dead-legs. Dead-legs consist of reglons of stagnant fluid where harmful organisms can proliferate unaffected by the scounng effects of distribution …
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Heat Transfer and Flow Measurements on a One-Scale Gas Turbine Can Combustor Model
… out along the combustor wall to determine the thermo-fluid dynamic effects inside a combustor. The temperature and heat transfer profile along the length of the combustor liner were determined and a heat transfer peak region was established. Constant-heat-flux boundary condition was established …
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Wind- and thermal-driven air flows and the buoyancy and advection effects on air exchange within urban environments
… lived in urban areas. Studies of the urban air fluid dynamics can be applied to increase pedestrian comfort and emergency response planning. In this study we focus on thermal effects on urban air flows. The thermal effects are extended beyond what is found in the literature to better understand …
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Experimental investigation and mathematical modelling of dynamic equilibrium of novel thermo-fluids for renewable technology applications
… radiation is converted to heat via a thermal fluid for power and heat generation. Medium and high-temperature solar thermal systems where concentrated collectors are employed have been utilised for power generation, whereas low-temperature solar systems where non-concentrated collectors such …
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Analysis of the nail board experiment to measure the liquid slag depth in steel continuous casting
… the nail. For this investigation, a transient thermo-fluid model of the nail and wire dipping process has been developed using ANSYS Fluent. In addition, the solidification of the molten steel on the nail is studied through analytical solutions and a computational model developed in ANSYS …
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Burn time measurements of micron sized Al-Mg alloys and Mg in a heterogeneous shock tube in different oxidizing environments
… tubes and a CMOS high speed imaging camera. A thermo-fluid model uses transport properties to determine the approximate location of the particles in the post reflected flow. Burning time measurements are used to determine if any size, pressure, temperature and oxidizer dependence exists. …
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A methodology to investigate the cause of quenching in once-through tower type power plant boilers
… into a number of control volumes and a dynamic thermo-fluid process model was developed to solve the transient conservation of mass and energy equations for each volume using a semi-implicit time wise integration scheme. The liquid tracking model was verified by comparison with a similar model …
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