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Fall 2009
A common challenge during deposition of slurries is segregation as large particles settle through the matrix of fines and water. Whether segregation occurs or not depends on the grain size distribution of the solids, the void ratio or solids content and the rheological properties of the...
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High-Float Emulsion Residue: A New Rheological Model Based on the Existence of a Yield Stress
DownloadFall 2016
“High-float” (HF) emulsions are dispersions of micron-sized bitumen droplets in water, with a special type of anionic surfactant functioning as stabilizer. By allowing the water to evaporate from an HF emulsion, what remains is called a “high-float emulsion residue.” Although indistinguishable in...
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Hydrothermal Treatment of Low Rank Coal for Making High Solid Loading and Stable Coal Water Slurries
DownloadFall 2014
The objective of this research is to understand the effect of hydrothermal dewatering (HTD) on surface properties, stability and rheological behavior of lignite water slurry (LWS). The surface forces between coal particles are found to be attractive after HTD, which is proven by contact angle and...
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Fall 2015
The rheological properties of heavy oil and bitumen depend on factors such as temperature, pressure, diluent type and diluent composition, as well as sample shear and thermal histories and shear conditions during measurements. Each of these factors can affect the value of apparent viscosity...
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Impact of Suspended Cuttings on Drilling Fluid Rheology and Hole Cleaning Capacity in Horizontal Directional Drilling
DownloadFall 2020
Trenchless technologies are a family of techniques to install or rehabilitate conduits under the ground without conventional open excavation processes. Among them, horizontal directional drilling (HDD) is one of the most popular methods for installation of pipelines under surface obstacles, due...
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Interactions between a flat slab and overriding plate: Controlling factors of subduction dynamics and continental deformation
DownloadFall 2022
Subduction zones are active plate margins that have an important role in mantle and lithosphere processes. Subduction is driven by the negative buoyancy of the downgoing oceanic plate, resulting in a steep descent angle at most subduction zones. However, in approximately 10% of modern subduction...
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Long Term Dynamics And Potential Remediation Of Fine Textured Soils And Ground Water Contaminated With Chlorinated Organic Compounds And Salts
DownloadFall 2019
Contamination of land, water, and air is a widespread concern often associated with anthropogenic activities. Remediation of contaminated sites is necessary to minimize negative impacts on human health and the environment and allow for safe, productive use of land. Although contaminated sites...
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Fall 2012
Convergent plate boundaries have played an important role in the growth and assembly of the modern continents. To obtain a better understanding of the tectonic processes in these boundaries, it is necessary to constrain the rheology of the crust and upper mantle in these regions. Magnetotelluric...
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MODELLING THE RHEOLOGY OF COMPLEX FLUIDS : Cases of Bitumen and Heavy Oils at low temperatures.
DownloadFall 2011
As complex fluids such as heavy oil or bitumen pass from the field to process units, structural and compositional changes occur that are intimately linked with pressure (P), temperature (T), and shear histories. In this exploratory work, a modified Structural Kinetics Model is used to calculate...
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Modification of pulse starch properties by nanoparticulation and phosphorylation techniques
DownloadFall 2021
The global demand for plant-based protein is fast growing. This has resulted in significant expansion of pulse grain fractionation and value-added processing operations that primarily focus on protein refining. Pulse starches, as the major by-product of those operations, remain underutilized...