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 136 for “"Fluid model"”.
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Improved closure relations for the two fluid-model in flashing flows
The two-fluid model is a widely used approach for the modeling of two-phase flows, consisted of two separate sets of mass, momentum, and energy conservation equations for the liquid and gas phases. In the two-fluid model, the interaction between the phases is determined by the mass, momentum, and …
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Using Simulink to Develop a One-Dimensional, Two-Phase Fluid Model
In this thesis, a one-dimensional, two-fluid model is developed in MATLAB-Simulink. The model features a mass, momentum, and energy balance for each fluid--an ideal gas and an incompressible liquid. The simulation may model a straight pipe section, or a pipe section that involves a cross-sectional …
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Well-posedness and convergence of cfd two-fluid model for bubbly flows
… developing a well-posed multidimensional CFD two-fluid model (TFM) for bubbly flows. Two-phase flows exhibit a wide range of local flow instabilities such as Kelvin-Helmholtz, Rayleigh-Taylor, plume and jet instabilities. They arise due to the density difference and/or the relative velocity …
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Vapor Generation in the Two-Group Two-Fluid Model in Boiling Flow
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Influence of the city geometric features on the two fluid model parameters
… and pedestrians using the network. The Two Fluid Model was introduced to help evaluate the quality of traffic service in urban street networks. The model parameters, T<sub>m</sub> and n, are used as a scale to compare traffic quality in two or more urban street networks. It is known that the …
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Viability of a proposed transparent fluid model for analog metal casting filling process
1 PDF file (viii, 53 pages)
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Sensitivity of the Two-Fluid Model to Constitutive Correlations for Large Diameter Pipes
<p>"Multiphase flows are a significant factor in nuclear reactor operations. In order to understand this behavior in reactor systems, system analysis codes are used to simulate reactor conditions. Due to the nature of the nuclear industry, simulations predicting the void development in the core are …
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Gaussian processes at the Helm(holtz): A more fluid model for ocean currents
… Gaussian processes (GPs) offer an attractive model. But we show that applying a GP with a standard stationary kernel directly to buoy data can struggle at both current prediction and divergence identification – due to some physically unrealistic prior assumptions. To better reflect known …
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Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting
… of continuous-cast steel. A computational model of the meniscus region has been developed, that 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 …
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The two-fluid model with interfacial area transport equation in gas-dispersed condensing flows
The student, Vineet Kumar, accepted the attached license on 2019-10-01 at 17:11.
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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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Two-phase two-fluid model solver based on a high-resolution total variation diminishing scheme
… method and a solver for the two-phase two-fluid model are developed using an innovative high-resolution, Total Variation Diminishing (TVD) scheme. The new scheme is derived first for scalar hyperbolic problems using the method of flux limiters, then extended to the two-phase two-fluid …
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Adjoint sensitivity analysis of the two-phase two-fluid model based on an approximate Riemann solver
… analysis framework for the two-phase two-fluid model are developed and verified. Both the numerical solver and the adjoint sensitivity analysis framework are based on an analytical analysis of the two-phase two-fluid model. The challenge (due to the arbitrary equation of state) in the …
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NUMERICAL ANALYSIS OF TURBULENT GAS-SOLID FLOWS IN A ROUGH HORIZONTAL CHANNEL USING THE EULERIAN TWO-FLUID MODEL
… materials such as pulverized coal, circulating fluidized beds and dust and particle-exhaust pollution control systems. Modelling the gas-solid flow is a major challenge since the flow is turbulent which renders the system non-linear. In addition, the presence of particles further complicates the …
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Analysis of interfacial forces on the physics of two-phase flow and hyperbolicity of the two-fluid model
The scope of this Master Thesis is the two-fluid model. This study aims at analysing their ill-posedness, showing how it is related to non-hyperbolicity and giving a measurement that I call the numerical hyperbolicity. As a cure to this important issue, we will propose a combination of physical and …
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Investigation of meniscus region behavior and oscillation mark formation in steel continuous casting using a transient thermo-fluid model
… marks is very valuable. A computational model was created of the meniscus 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 …
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An Unequal Velocity, Unequal Temperature Two-Fluid Model of Vapor-Liquid Flow and Solution of a Standard Blowdown Problem
Made available in DSpace on 2017-07-06T18:42:40Z (GMT). No. of bitstreams: 3 Ho_Szu-Hsiung_PhD.pdf: 84258926 bytes, checksum: dbcbb8ca8737f66fab7a2f4ba566c332 (MD5) Ho_Szu-Hsiung_PhD_ABS.pdf: 907525 bytes, checksum: e7e058883ef0ca74c8f46d0a2fb3956a (MD5) license.txt: 4813 bytes, checksum: …
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Impact of ion-neutral collisions in fluid models of plasma sheath
… of an improved one-dimensional self-consistent fluid modeling of argon plasmas in DC discharges, including the sheath regions, is presented. Comparison of the charged species density, electron mean energy, plasma potential and ion velocity profiles with the profiles obtained by other fluid …
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Enabling Theoretical Model Based Techniques for Simulating Large Scale Networks
We develop a fluid model of describing the data transmission activities in IEEE 802.11-operated WLANs, and used it to explore whether or not fluid model-based simulation is effective in simulating WLANs. Fluid model based simulation is not well-suited for studying the network behavior under light …
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