Index Catalog // ScholarsArchive@OSU

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:: exchanger design it increases laminar heat transfer while extending the Reynolds number range of laminar

Performance of rotary regenerative heat exchanger--a numerical simulation

Creator:: Bae, Young Lib
Abstract:: This thesis examines the transient and steady-state temperature performance of a rotary regenerative heat exchanger. In contrast to previous studies on this problem, fluid flow in the circumferential direction was considered. Appropriate modeling was included to measure the effect of carry-over on the differential equations describing mass and energy conservation....
Resource Type:: Dissertation
Full Text:: Performance of rotary regenerative heat exchanger--a

An experimental study of co-flow ammonia-water desorption in an oil-heated, microscale, fractal-like branching heat exchanger

Creator:: Mouchka, Gregory A.
Abstract:: An experimental study was performed in which an ammonia-water solution was desorbed within a branching fractal-like microchannel array. The solution entered in the center of a disk, and flowed out radially until discharging in to a gravity-driven separation chamber. Heat was added to the ammonia-water through a thin wall, above...
Resource Type:: Masters Thesis
Full Text:: temperature. Heat exchanger analyses (LMTD and c-NTU) were done to determine the heat transfer

A numerical study of viscous, incompressible fluid flow problems

Creator:: Terry, Michael D.
Abstract:: The mathematical technique of overrelaxation is used here to speed the convergence of a numerical method for solving viscous, incompressible fluid flow problems. The method, called MAC, involves approximating the complete two-dimensional incompressible Navier-Stokes equations with analogous finite-difference equations. The MAC method was developed by the Los Alamos Scientific Laboratory...
Resource Type:: Masters Thesis
Full Text:: NUMERICAL STUDY OF VISCOUS, INCOMPRESSIBLE FLUID FLOW PROBLEMS Redacted for Privacy_ Abstract approved

Simple models for the structure and dynamics of polyatomic fluids

Creator:: James, Corinne Patricia
Abstract:: Three areas of liquid state theory are considered. First, Monte Carlo computer simulation of a two-dimensional hard disk fluid with an imbedded ellipse was undertaken to determine how a non-spherical molecule affects intermolecular ordering. The elliptical molecule (with axial ratios of 2, 5 and 10) altered the isotropic distribution of...
Resource Type:: Dissertation
Full Text:: simulation of a two-dimensional fluid of hard disks is used to model the fluid of isotropic molecules and

Winter cover cropping effects on integrative biological indicators of soil quality

Creator:: Ndiaye, Evelyne L.
Abstract:: Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...
Resource Type:: Masters Thesis
Full Text:: organic matter but it is a dynamic, living component that is involved in various biogeochemical

Using a single-well push-pull test to estimate mass transfer rate parameters

Creator:: Kelley, Michael John
Abstract:: More efficient methods are needed for the in-situ evaluation of mass transfer parameters which describe the movement of solutes through aquifer material. The objective of this study was to develop a method for estimating diffusion rate and capacity coefficients using a single-well, "push-pull" tracer test. The method consists of the...
Resource Type:: Masters Thesis
Full Text:: 2.4 Mathematical Model 22 3. PHYSICAL AQUIFER MODF.T. (PAM) 27 3.1 Overview and Background

A lagrangian philosophy for plume modeling

Creator:: Frick, Walter Eugen
Resource Type:: Dissertation
Full Text:: 46 Entrainment and Merging 47 MATHEMATICAL DEVELOPMENT 49 Basic Model Theory 49 Plume Dynamics 51

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

Creator:: Costa, Timothy B.
Abstract:: In this work we consider two multiscale applications with tremendous computational complexity at the lower scale. First, we examine a model for charge transport in semicon- ductor structures with heterojunction interfaces. Due to the complex physical phenomena at the interface, the model at the design scale is unable to adequately...
Resource Type:: Dissertation
Full Text:: decomposition methods that decouple the interface computation from the macroscale model. For the fluid flow

A numerical model of drop-on demand droplet formation from a vibrating nozzle and a rigid nozzle

Creator:: Yang, Guozhong
Abstract:: Droplet formation from a rigid and a vibration nozzle driven by a pulsing pressure is simulated. Droplet formation is simulated by using one-dimensional model. For the case of droplet formation from a vibration nozzle, the nozzle vibration is simulated by large deflection plate vibration equation. Droplet formation from a rigid...
Resource Type:: Masters Thesis
Full Text:: model and marker-and-cell front tracking technique. The fluid was considered as incompressible. He

ScholarsArchive@OSU

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

Performance of rotary regenerative heat exchanger--a numerical simulation

An experimental study of co-flow ammonia-water desorption in an oil-heated, microscale, fractal-like branching heat exchanger

A numerical study of viscous, incompressible fluid flow problems

Simple models for the structure and dynamics of polyatomic fluids

Winter cover cropping effects on integrative biological indicators of soil quality

Using a single-well push-pull test to estimate mass transfer rate parameters

A lagrangian philosophy for plume modeling

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

A numerical model of drop-on demand droplet formation from a vibrating nozzle and a rigid nozzle

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