Index Catalog // ScholarsArchive@OSU

Void fraction variations in a fractal-like branching channel network

Creator:: Cullion, Rebecca
Abstract:: Two-phase flow in a fractal-like branching microchannel heat sink may have enhanced heat transfer capabilities over single phase flow in the same branching channel network. In order to exploit this potential, a complete understanding of flow boiling in this geometry is required. The fractal-like geometry is similar to that of...
Resource Type:: Dissertation
Full Text:: Macroscale Two-Phase Flow . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.3 Microscale Two-Phase

Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

Creator:: Kwak, Younghoon
Abstract:: Two-phase gas-liquid flows in microscale fractal-like branching channel flow networks were experimentally studied to assess the validity of existing void fraction correlations and flow regimes based on superficial gas and liquid velocities. Void fractions were assessed using two different methods. First, void fraction data were acquired using a High-Speed-High-Resolution (HSHR)...
Resource Type:: Dissertation
Full Text:: . Title: Experimental Study of Two-Phase Gas-Liquid Flow in a Microscale Fractal-Like Branching Flow

A study of climbing-film flow characteristics of various liquids and air in an annular duct

Creator:: Vierra, George Joseph
Abstract:: Momentum transfer in climbing-film flow in an annular duct was investigated. Air and various liquids, with a wide range of viscosities and surface tensions, were investigated. The two phases flowed co-currently upward, the liquid climbing as a thin film on the inner wail while the outer wall remained dry. The...
Resource Type:: Dissertation
Full Text:: PREVIOUS WORK 4 Single-Phase Flow in an Annulus 4 Two-Phase Gas-Liquid Flow 13 Pressure Drop 15 Rough Wall

Stability improvement of the one-dimensional two-fluid model for horizontal two-phase flow with model unification

Creator:: Abel, Kent C.
Abstract:: The next generation of nuclear safety analysis computer codes will require detailed modeling of two-phase fluid flow. The most complete and fundamental model used for these calculations is known as the two-fluid model. It is the most accurate of the two-phase models since it considers each phase independently and links...
Resource Type:: Dissertation
Full Text:: Improvement of the One-Dimensional Two-Fluid Model for Horizontal Two-Phase Flow with Model Unification

A unified model of one-dimension two-fluid horizontal flows and its stability analysis

Creator:: Kim, Dong-Wan
Abstract:: An improved version of the one-dimensional horizontal two-fluid flow model has been developed by incorporating physical terms for gravity and local void fraction profiles. Introduction of an interface mixing layer concept allows the one-dimensional two-fluid model to remain hyperbolic. This will overcomes a major obstacle in using the current one-dimensional...
Resource Type:: Dissertation

Multiscale modeling of two-phase flows in microarchitectures with microfeatures

Creator:: Truszkowska, Agnieszka
Abstract:: Two-phase flows in microtechnology based devices are purposefully present in multiphase reactors, phase separators, analytical devices and others. Two-phase flows can also be an undesirable side effect occurring during operation due to phase transitions or, more commonly, introduction of surrounding air through equipment gaps and with process feed. In both...
Resource Type:: Dissertation
Full Text:: immis cible liquid systems, can be found in [10]. Two-phase flow solutions for nanoparticle and

A general theory of flooding implementing the cuspoid catastrophe

Creator:: Lafi, Abd Y.
Abstract:: The flooding phenomenon can be defined as the maximum attainable flow condition beyond which the well defined countercurrent flow pattern can no longer exist. Thus the countercurrent flow limit (CCFL) or the flooding limit may be thought of as the flow condition at which the strong interaction between the two...
Resource Type:: Dissertation
Full Text:: Flow Pattern 1 1.2 Annular Two-Phase Flow 3 1.3 Onset of the Flooding Phenomenon 5 1.4 Phenomenon

Synthesis of colloidal metal oxide nanocrystals and nanostructured surfaces using a continuous flow microreactor system and their applications in two-phase boiling heat transfer

Creator:: Choi, Chang-Ho
Abstract:: Metal oxide nanocrystals have attracted significant interests due to their unique chemical, physical, and electrical properties which depend on their size and structure. In this study, a continuous flow microreactor system was employed to synthesize metal oxide nanocrystals in aqueous solution. Assembly of nanocrystals is considered one of the most...
Resource Type:: Dissertation
Full Text:: Nanostructured Surfaces Using a Continuous Flow Microreactor System and their Applications in Two-phase

On the effects of centrifugal forces in air-water two-phase flow regime transitions of an adiabatic helical geometry

Creator:: Young, Eric P.
Abstract:: Two-phase flow in helical conduits is important in many industries where reaction between components, heat transfer, and mass transport are utilized as processes. The helical design is chosen for the effects of secondary flow patterns that reduce axial dispersion, increased heat transfer, and also their compact design. The first is...
Resource Type:: Dissertation
Full Text:: Effects of Centrifugal Forces in Air-Water Two-Phase Flow Regime Transitions of an Adiabatic Helical

Modeling in-situ vapor extraction during flow boiling in microscale channel

Creator:: Salakij, Saran
Abstract:: In-situ vapor extraction is performed by applying a pressure differential across a hydrophobic porous membrane that forms a wall of the channel as a means of reducing the local quality of flow boiling within the channel. As the local quality is reduced, the heat transfer capability can be improve while...
Resource Type:: Dissertation
Full Text:: . ................................................................................................................19 4. Membrane contact phase for horizontal two-phase laminar-laminar flow in rectangular channel

Single Phase and Flow Boiling Heat Transfer and Flow Characterization in Microscale Pin Fin Heat Sinks

Creator:: Rasouli, Erfan
Abstract:: The ever increasing requirements for heat dissipation in various thermal management applications such as computer chip cooling and high power electronics have necessitated the need for novel thermal management techniques. Thermal management using heat sinks with microscale features is amongst the prominent techniques developed over the past two decades. In...
Resource Type:: Dissertation
Full Text:: regime, the heat sinks with unsteady flow flapping show higher two-phase heat transfer coefficients

Investigating capillary pressure and interfacial area for multiphase flow in porous media using pore-scale imaging and lattice-Boltzmann modeling

Creator:: Porter, Mark L.
Abstract:: Recent advances in imaging technology and numerical modeling have greatly enhanced pore-scale investigations of multiphase flow and transport in porous media. It is now feasible to obtain high resolution 3-dimensional pore-scale data, and numerical methods such as the lattice- Boltzmann (LB) technique have been developed specifically for simulating such phenomena....
Resource Type:: Dissertation
Full Text:: Two Immiscible Fluids . . . . . . . . . . . . . . 13 2.2.2 Richard's Equation for Flow in the Vadose

ScholarsArchive@OSU

Void fraction variations in a fractal-like branching channel network

Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

A study of climbing-film flow characteristics of various liquids and air in an annular duct

Stability improvement of the one-dimensional two-fluid model for horizontal two-phase flow with model unification

A unified model of one-dimension two-fluid horizontal flows and its stability analysis

Multiscale modeling of two-phase flows in microarchitectures with microfeatures

A general theory of flooding implementing the cuspoid catastrophe

Synthesis of colloidal metal oxide nanocrystals and nanostructured surfaces using a continuous flow microreactor system and their applications in two-phase boiling heat transfer

On the effects of centrifugal forces in air-water two-phase flow regime transitions of an adiabatic helical geometry

Modeling in-situ vapor extraction during flow boiling in microscale channel

Single Phase and Flow Boiling Heat Transfer and Flow Characterization in Microscale Pin Fin Heat Sinks

Investigating capillary pressure and interfacial area for multiphase flow in porous media using pore-scale imaging and lattice-Boltzmann modeling

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