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 7 of 7 for “"Two Zone model"”.
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One-Dimensional Performance Modeling of Centrifugal Flow Vaned Diffusers
The Two Element in Series (TEIS) and Two Zone models stand out as powerful tools that enable deeper understanding of compressor stage designs after they have been tested. The insights gained from these investigations have aided in improving new stage designs. Up to now, it has only been possible to …
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Stochastic analysis of dense nonaqueous phase liquid dissolution in naturally heterogeneous subsurface systems
… DNAPL saturation distribution in a source zone is derived, based on the previous research to describe the field-scale nonuniform residual DNAPL distribution. A local-scale dissolution model is generalized from the laboratory experimental results. Effective transport and dissolution …
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Modeling and characterizing bi-directional airflow in natural ventilation
… using computational fluid dynamics (CFD). Two important scenarios are simulated and analyzed: 1. Two-zone model with pure buoyancy forces, 2. Multi-zone model with combined wind and buoyancy forces. In the 1st model, a new concept of "local discharge coefficient" is proposed for its …
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Spatially Resolved Species and Temperature Profiles in the Oxidative Dehydrogenation of Ethane on Mono and Bimetallic Catalysts at Short Contact Times
… dehydrogenation rates. H2 addition tests show a two zone model; preferential oxidation to H2 raising the catalyst temperature while preserving C2H6, followed by C2H4 production. On Rh, H2 addition produced minimal change. The differences in catalytic performances are attributed to the high …
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Exergy Based SI Engine Model Optimisation. Exergy Based Simulation and Modelling of Bi-fuel SI Engine for Optimisation of Equivalence Ratio and Ignition Time Using Artificial Neural Network (ANN) Emulation and Particle Swarm Optimisation (PSO).
In this thesis, exergy based SI engine model optimisation (EBSIEMO) is studied and evaluated. A four-stroke bi-fuel spark ignition (SI) engine is modelled for optimisation of engine performance based upon exergy analysis. An artificial neural network (ANN) is used as an emulator to speed up the …
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Fire Scenario Development for South African Hospitals
… Consolidated Fire and Smoke Transport (CFAST) two-zone model. The objective was to evaluate how typical SA operational and emergency procedures, and system functionality influence environmental conditions affecting vulnerable occupants. Following a performance-based design (PBD) methodology, …
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Methodologies to strategize the utilization of modeling and simulation for probabilistic risk assessment (PRA) of nuclear power plants: Applications in fire PRA
… including data-driven statistical analyses, modeling and simulation (M&S) of underlying phenomena, expert elicitation, or hybrid approaches that integrate these methods. Presently, there is a growing reliance on M&S in the PRA of NPPs for several reasons: (i) having limited empirical data for …