Search Results - "Hrenya, Christine M"

Method of quantifying surface roughness for accurate adhesive force predictions by LaMarche, Casey Q., Leadley, Stuart, Liu, Peiyuan, Kellogg, Kevin M., Hrenya, Christine M.

“…The van der Waals force between contacting surfaces depends strongly on the surface roughness. Theories that allow for estimating the adhesion force, or the…”
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Review of entrainment correlations in gas–solid fluidization by Chew, Jia Wei, Cahyadi, Andy, Hrenya, Christine M., Karri, Reddy, Cocco, Ray A.

“…•Review of applicability of entrainment correlations to Geldart Groups A and B.•Monodisperse, binary, and continuous particle size distributions (PSDs)…”
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Linking micro-scale predictions of capillary forces to macro-scale fluidization experiments in humid environments by LaMarche, Casey Q., Miller, Andrew W., Liu, Peiyuan, Hrenya, Christine M.

“…The effects of increasing relative humidity (RH) on fluidization/defluidization are investigated experimentally and understood via particle‐level predictions…”
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Experimental segregation profiles in bubbling gas-fluidized beds by Joseph, Gustavo G, Leboreiro, José, Hrenya, Christine M, Stevens, Andrea R

“…Species segregation measurements were performed in a fluidized bed composed of a binary, Geldart B mixture. Three system types were explored: size segregation,…”
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Enskog theory for polydisperse granular mixtures. III. Comparison of dense and dilute transport coefficients and equations of state for a binary mixture by Murray, J. Aaron, Garzó, Vicente, Hrenya, Christine M.

“…The objective of this study is to assess the impact of a dense-phase treatment on the hydrodynamic description of granular, binary mixtures relative to a…”
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The Clustering Instability in Rapid Granular and Gas-Solid Flows by Fullmer, William D, Hrenya, Christine M

“…Flows of solid particles are known to exhibit a clustering instability-dynamic microstructures characterized by a dense region of highly concentrated particles…”
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Cluster-Induced Deagglomeration in Dilute Gravity-Driven Gas-Solid Flows of Cohesive Grains by Liu, Peiyuan, Hrenya, Christine M

“…Clustering is often presumed to lead to enhanced agglomeration between cohesive grains due to the reduced relative velocities of particles within a cluster…”
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Quantitative assessment of fine-grid kinetic-theory-based predictions of mean-slip in unbounded fluidization by Fullmer, William D., Hrenya, Christine M.

“…Significance The quantitative ability of a kinetic‐theory‐based, two‐fluid model is demonstrated in a clustering (unstable) gas‐solid system via highly…”
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An error-controlled adaptive time-stepping method for particle advancement in coupled CFD-DEM simulations by Sitaraman, Hariswaran, Vaidhynathan, Deepthi, Grout, Ray, Hauser, Thomas, Hrenya, Christine M., Musser, Jordan

“…Coupled Computational-Fluid-Dynamics (CFD) and Discrete-Element-Method (DEM) models provide an accurate description of multiphase physical systems where a…”
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Fine-particle defluidization: Interaction between cohesion, Young's modulus and static bed height by Liu, Peiyuan, LaMarche, Casey Q, Kellogg, Kevin M, Hrenya, Christine M

“…The defluidization of fine (mildly cohesive) glass particles with mean size 69 mu m is studied by DEM-CFD simulations and experiments for quantitative model…”
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On the use of a powder rheometer to probe defluidization of cohesive particles by Mishra, Ipsita, Liu, Peiyuan, Shetty, Abhishek, Hrenya, Christine M.

“…•Defluidization experiments in a powder rheometer for fine glass particles are reported.•An impeller at a sufficiently high rotation speed is shown to mitigate…”
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Continuum prediction of scale-dependent, anisotropic fluctuating kinetic energy in gas-solid flows by Fullmer, William D., Hrenya, Christine M.

“…•Granular temperature and spatially averaged fluctuating kinetic energy are reviewed.•The two measures are arising from spatial averaging are related, but…”
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Challenges of DEM: II. Wide particle size distributions by Berger, Kyle J., Hrenya, Christine M.

“…Realistic granular systems consist of particles of differing sizes, shapes, and material properties. One method commonly used when examining granular systems…”
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Link between bubbling and segregation patterns in gas-fluidized beds with continuous size distributions by Chew, Jia Wei, Hrenya, Christine M.

“…Experiments involving a bubbling, gas‐fluidized bed with Gaussian and lognormal particle‐size distributions (PSDs) of Geldart Group B particles have been…”
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A coupled, multiphase heat flux boundary condition for the discrete element method by Lattanzi, Aaron M., Hrenya, Christine M.

“…•A new total heat flux boundary condition (BC) for multiphase flows is proposed.•The BC couples the heat flux at the wall for the gas and solid phases.•Wall…”
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A fully-developed boundary condition for the random walk particle tracking method by Lattanzi, Aaron M., Yin, Xiaolong, Hrenya, Christine M.

“…•A new fully developed boundary condition (BC) for the random walk method is proposed.•The BC employs a semi-reflecting barrier that accounts for local…”
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Very small‐scale, segregating‐fluidized‐bed experiments: A dataset for CFD‐DEM validation and uncertainty quantification by LaMarche, W. Casey Q., Dahl, Steven R., Fullmer, William D., Hrenya, Christine M.

“…Fluidization experiments were conducted on a small scale and with a rapid response (short duration) to enable corresponding simulations at low‐computational…”
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Toward general regime maps for cohesive‐particle flows: Force versus energy‐based descriptions and relevant dimensionless groups by LaMarche, W. Casey Q., Liu, Peiyuan, Kellogg, Kevin M., Lattanzi, Aaron M., Hrenya, Christine M.

“…Much confusion exists on whether force‐ or energy‐based descriptions of cohesive‐particle interactions are more appropriate. We hypothesize a force‐based…”
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Challenges of DEM: I. Competing bottlenecks in parallelization of gas–solid flows by Liu, Peiyuan, Hrenya, Christine M.

“…An analysis is performed on the computational efficiency of performing gas–solid simulations based on the open source code MFIX, which was recently…”
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Experimental validation of indirect conduction theory and effect of particle roughness on wall‐to‐particle heat transfer by Mishra, Ipsita, Lattanzi, Aaron M., LaMarche, Casey Q., Morris, Aaron B., Hrenya, Christine M.

“…Conduction between a flat wall and solid particles is important to heat transfer in various industrial unit operations. Predicting heat transfer in such…”
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