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Filtering by: Committee Member Wildenschild, Dorthe Remove constraint Committee Member: Wildenschild, Dorthe Resource Type Dissertation Remove constraint Resource Type: Dissertation

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Development and validation of acoustic measurement techniques for void fraction in concentric annular geometries

Creator:

Tost, Brian C.

Abstract:

This work investigates the acoustic velocity of gas-liquid mixtures in vertical, co-current flow in a concentric annulus. Acoustic velocity shows promise as a detection parameter for the presence and amount of gas in a liquid flow because of its high sensitivity to gas void fraction in a gas-liquid mixture. However,...

Resource Type:

Dissertation
Towards the Development of Performance-Based Concrete Mixtures Made with Modern Cementitious Materials Using Thermodynamic Modeling

Creator:

Bharadwaj Ravi, Keshav

Abstract:

This thesis builds on a modeling tool that has been developed to link thermodynamic modeling and concrete performance. This tool is intended to predict the performance for modern concrete mixtures made with ordinary portland cement (OPC), conventional and novel supplementary cementitious materials (SCMs), and limestone (Ls). The first part of...

Resource Type:

Dissertation
Numerical Methods for Upscaling Complex Transport Phenomena

Creator:

Taghizadeh, Ehsan

Abstract:

Transport phenomena specially the ones that occur in the various engineering disciplines such as tissue engineering and natural environment are often complex to analyze mostly due to the dynamic and geometric complexities; as such, they have been the subject of an active and intense area of research in past decades....

Resource Type:

Dissertation
Vortical Structures in Transition to Turbulence through Randomly Packed Porous Media: Scale, Energy, and Mixing Characteristics

Creator:

Mohammadi Ziazi, Reza

Abstract:

Vortical structures are the driving mechanism of transition to turbulence in porous media requiring adequately resolved observations along with analysis of the scale and energy of ﬂow within the pores. Of speciﬁc interest is to understand the vortex dynamics, energy, and turbulent mixing and transport properties in the scale of...

Resource Type:

Dissertation
Geometric Motion Planning for Inertial Systems

Creator:

Faraji, Hossein

Abstract:

In order to enable better visualization and understanding of the effect of the robot's geometry and inertia on the robot's trajectories, this dissertation proposes to use geometric mechanics to bridge the gap between the physical motion of a robot and its mathematical structure. The main focus of this research is...

Resource Type:

Dissertation
Signatures in the Subsurface - Big & Small Data Approaches for the Spatio-Temporal Analysis of Geologic Properties & Uncertainty Reduction

Creator:

Rose, Kelly Kathleen

Abstract:

Despite more than two centuries of exploration, including more than six million deep wellbores with depths exceeding 40,000 feet in some parts of the world, our ability to constrain subsurface processes and properties remains limited. Characteristics of the subsurface vary and can be analyzed on a variety of spatial scales....

Resource Type:

Dissertation
Problems of Shape and Information in Multiscale Modeling of Transport Phenomena

Creator:

Ostvar, Sassan

Abstract:

This work is a compilation of problems that deal with multiscale analysis of transport phenomena in environmental systems. A common feature among the problems studied here is the presence of non-negligible microscale structure in various forms. Each problem is approached from the perspective that a macroscopic observable encodes aspects of...

Resource Type:

Dissertation
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
Wood-adhesive bondline analyses with micro x-ray computed tomography

Creator:

Paris, Jesse Loren

Abstract:

There is no doubt that adhesive penetration plays an important role in wood bondline joint performance and durability; yet, to date there is no direct experimental evidence linking penetration depth with bond performance. This is, in part, because adhesive penetration is commonly assessed with various 2D microscopy techniques that are...

Resource Type:

Dissertation
Physiochemical mechanisms for the transport and retention of technetium

Creator:

Jansik, Danielle P.

Abstract:

Understanding the transport and retention of radionuclides in the environment is important for protecting freshwater supplies and minimizing impact to biologic systems. Technetium-99 (Tc⁹⁹) is a radionuclide of interest due to its long half-life (2.13 x 10⁵ years) and toxicity. In the form of pertechnetate (TcO₄⁻), Tc is expected to...

Resource Type:

Dissertation

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Academic Affiliation

Chemical, Biological and Environmental Engineering4
Mechanical, Industrial, and Manufacturing Engineering3
Civil and Construction Engineering1
Civil, Construction, and Environmental Engineering1
College of Earth, Ocean, and Atmospheric Sciences1
more Academic Affiliations »

Advisor

Istok, Jonathan D.2
Baham, John1
Dragila, Maria1
Fronk, Brian M.1
Hatton, Ross L.1
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Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 2007 to 2024

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Committee Member

Wildenschild, Dorthe[remove]16
Showalter, Ralph2
Wood, Brian2
Apte, Sourabh1
Balasubramanian, Ravi1
more Committee Members »

Creator

Bharadwaj Ravi, Keshav1
Costa, Timothy B.1
Faraji, Hossein1
Grover, Deeksha1
Jansik, Danielle P.1
more Creators »

Contributor

Carney, Janine E.1

Date

Date range begin – Date range end

Current results range from 2006 to 2023

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Decade

2020-20293
2010-20199
2000-20094

Degree Field

Civil Engineering3
Mechanical Engineering3
Chemical Engineering2
Environmental Engineering2
Crop Science1
more Degree Fields »

Degree Level

Doctoral16

Degree Name

Doctor of Philosophy (Ph.D.)16

File Format

application/pdf3

Language

English [eng]16

License

All rights reserved15

Non-Academic Affiliation

Oregon State University. Graduate School11
Oregon State University. Collaborative Robotics and Intelligent Systems (CoRIS) Institute1

Peer Reviewed

No15

Resource Type

Dissertation[remove]16

Rights Statement

In Copyright16

Subject

Transport theory2
Adhesives -- Imaging1
Bacteria -- Adhesion1
Barley -- Disease and pest resistance -- Genetic aspects1
Biofilms1
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