Index Catalog // ScholarsArchive@OSU

Evaluating Stiffness Metrics for Predicting the Cost of Chemical Kinetics Integration

Creator:: Alferman, Andrew Thomas
Abstract:: Simulations of combustion and reacting flows often encounter stiffness in the equations governing chemical kinetics. Explicit solvers for these ordinary differential equations offer low computational expense, but typically cannot efficiently handle stiff systems. In contrast, implicit methods demand greater expense but offer unconditional stability—as a result, most reactive-flow solvers rely...
Resource Type:: Masters Thesis

Nonlinear Degenerate Evolution Equations in Mixed Formulation

Creator:: Showalter, R. E.
Abstract:: We develop the theory of degenerate and nonlinear evolution systems in mixed formulation. It will be shown that many of the well-known results for the stationary problem extend to the nonlinear case and that the dynamics of a degenerate Cauchy problem is governed by a nonlinear semigroup. The results are...
Resource Type:: Article
Full Text:: equations in mixed formulation. SIAM Journal on Mathematical Analysis, 42(5), 2114-2131. doi:10.1137

Near-Linear-Time Deterministic Plane Steiner Spanners for Well-Spaced Point Sets

Creator:: Borradaile, Glencora and Eppstein, David
Abstract:: See article for Abstract.
Resource Type:: Article
Full Text:: graphs with edge-weights. SIAM J. Comput. 37(6):1926–1952, 2008, doi:10.1137/060649562. [16] J. S. B

Steady-State Diffusion in a Spatially Varying Porous Medium

Creator:: Ferrero, Peter T.
Abstract:: Heterogeneous porous material represents a persistent challenge in the field of engineering. Microscale properties such as the porosity and microchannel torturosity significantly control the macroscale transport characteristics of homogeneous porous medium. Additional complexity is introduced when these small-scale features vary in space. Examples of heterogeneous porous systems include artificial body...
Resource Type:: Masters Thesis

Using SIMD and SIMT vectorization to evaluate sparse chemical kinetic Jacobian matrices and thermochemical source terms

Creator:: Curtis, Nicholas J., Niemeyer, Kyle E., and Sung, Chih-Jen
Abstract:: Accurately predicting key combustion phenomena in reactive-flow simulations, e.g., lean blow-out, extinction/ignition limits and pollutant formation, necessitates the use of detailed chemical kinetics. The large size and high levels of numerical stiffness typically present in chemical kinetic models relevant to transportation/power-generation applications make the efficient evaluation/factorization of the chemical kinetic...
Resource Type:: Article

Data-driven imputation of miscibility of aqueous solutions via graph-regularized logistic matrix factorization

Creator:: Behnoudfar, Diba, Simon, Cory M., and Schrier, Joshua
Abstract:: Aqueous, two-phase systems (ATPSs) may form upon mixing two solutions of independently water-soluble compounds. Many separation, purification, and extraction processes rely on ATPSs. Predicting the miscibility of solutions can accelerate and reduce the cost of the discovery of new ATPSs for these applications. Whereas previous machine learning approaches to ATPS...
Resource Type:: Article

Simulating Soot Formation and Growth using a Parallel Coupled Monte Carlo Method

Creator:: Peters, Jordan
Abstract:: Small hydrocarbon particles such as soot and soot precursors pose a serious threat to human health and Earth's climate. Understanding the mechanisms by which soot particles form and grow is the first step to reducing the prevalence of these particles. Computational simulations are used to investigate combusting systems which are...
Resource Type:: Masters Thesis

Toward a flexible and accurate approach to null network sampling

Creator:: Bright, Zachary A.
Abstract:: Null networks are a type of random graph that is favored for the analysis of a wide variety of real-world networks, including gene-regulatory networks, food webs, and species co-occurrence matrices. As a hypothesis-generating tool, null networks are invaluable because they can reveal network motifs and unusual large-scale properties of networks...
Resource Type:: Masters Thesis

Intensified Diurnal Tides along the Oregon Coast

Creator:: Osborne, J. J., Kurapov, A. L., Egbert, G. D., and Kosro, P. M.
Abstract:: Intensified diurnal tides are found along portions of the Oregon shelf (U.S. West Coast) based on analyses of high-frequency (HF) radar surface current data and outputs of a 1-km resolution ocean circulation model. The K₁ tidal currents with magnitudes near 0.07 m s⁻¹ over a wider part of the shelf...
Resource Type:: Article
Full Text:: –446, doi:10.1137/0135035. Osborne, J. J., A. L. Kurapov, G. D. Egbert, and P.M. Kosro, 2011: Spatial

Model Selection of Discrete Classifiers under Class and Cost Distribution Change: An Empirical Study

Creator:: Ahmed, Nahian and Hutchinson, Rebecca A.
Abstract:: A variety of important machine learning applications require predictions on test data with different characteristics than the data on which a model was trained and validated. In particular, test data may have a different relative frequency of positives and negatives (i.e., class distribution) and/or different mislabeling costs of false positive...
Resource Type:: Technical Report
Full Text:: /10.1137/1.9781611973440.78. C Bradford Barber, David P Dobkin, and Hannu Huhdanpaa. The quickhull

ScholarsArchive@OSU

Evaluating Stiffness Metrics for Predicting the Cost of Chemical Kinetics Integration

Nonlinear Degenerate Evolution Equations in Mixed Formulation

Near-Linear-Time Deterministic Plane Steiner Spanners for Well-Spaced Point Sets

Steady-State Diffusion in a Spatially Varying Porous Medium

Using SIMD and SIMT vectorization to evaluate sparse chemical kinetic Jacobian matrices and thermochemical source terms

Data-driven imputation of miscibility of aqueous solutions via graph-regularized logistic matrix factorization

Simulating Soot Formation and Growth using a Parallel Coupled Monte Carlo Method

Toward a flexible and accurate approach to null network sampling

Intensified Diurnal Tides along the Oregon Coast

Model Selection of Discrete Classifiers under Class and Cost Distribution Change: An Empirical Study

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search