keywords
- granular flows, gas-particle fluidization, multiphase flows, clean energy production, aerosol dynamics, heat transfer in multiphase systems, concentrating solar power
- Contact Info
Hrenya, Christine M
Positions
- Professor, Chemical and Biological Engineering
Research Areas
- Chemical Engineering
- Chemicals Transport
- Coal Processing
- Coal Processing/Gasification
- Computational Fluid Dynamics
- Computer Modeling
- Condensed Matter
- Continuum Mechanics
- Energy Mathematical Sciences
- Fluid Dynamics
- Fluid Mechanics
- Fluid Physics
- Heat Transfer
- High Performance Computing
- Lunar Environment
- Lunar Exploration
- Microgravity/Reduced Gravity Experiments
- Renewable Energy Sources
- Synfuels
- Transport Phenomena
Research
Publications
selected publications
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chapter
-
The Clustering Instability in Rapid Granular and Gas-Solid Flows.
Annual Review of Fluid Mechanics.
485-510.
2017
- Kinetic theory for granular materials: Polydispersity 2011
-
The Clustering Instability in Rapid Granular and Gas-Solid Flows.
Annual Review of Fluid Mechanics.
485-510.
2017
-
conference proceeding
- The effect of a non-equipartition of energy on multi-component flows. MRS Online Proceedings Library. 91-96. 2002
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journal article
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Experimental measurements of gas-particle flows in large-scale strippers.
Chemical Engineering Science.
118087-118087.
2022
-
Experimental validation of the extraction of a particle-particle cohesion model (square-force) from simple bulk measurements (defluidization in a rheometer).
Chemical Engineering Science.
117782-117782.
2022
-
Very small‐scale, segregating‐fluidized‐bed experiments: A dataset for;
CFD‐DEM ; validation and uncertainty quantification. AIChE Journal. 2022
-
Toward reducing uncertainty quantification costs in DEM models of particulate flow: Testing simple, sensitivity-based, forward uncertainty propagation techniques.
Powder Technology.
117136-117136.
2022
-
Toward general regime maps for cohesive‐particle flows: Force versus energy‐based descriptions and relevant dimensionless groups.
AIChE Journal.
2021
-
An error-controlled adaptive time-stepping method for particle advancement in coupled CFD-DEM simulations.
Powder Technology.
203-216.
2021
-
Heat and momentum transfer to a particle in a laminar boundary layer.
Journal of Fluid Mechanics.
2020
-
On the use of a powder rheometer to probe defluidization of cohesive particles.
Chemical Engineering Science.
2020
-
Comparison of velocimetry methods for horizontal air jets in a semicircular fluidized bed of Geldart Group D particles.
Powder Technology.
323-330.
2020
-
Experimental validation of indirect conduction theory and effect of particle roughness on wall-to-particle heat transfer.
AIChE Journal.
2019
-
Continuum prediction of entrainment rates and agglomeration of gas-fluidized, lightly-cohesive particles.
Chemical Engineering Science.
249-257.
2019
-
A fully-developed boundary condition for the random walk particle tracking method.
International Journal of Heat and Mass Transfer.
604-610.
2019
-
A hybrid lattice Boltzmann – random walk method for heat transfer in gas–solids systems.
100007-100007.
2019
-
Cluster-Induced Deagglomeration in Dilute Gravity-Driven Gas-Solid Flows of Cohesive Grains.
Physical Review Letters.
2018
-
Continuum prediction of scale-dependent, anisotropic fluctuating kinetic energy in gas-solid flows.
Chemical Engineering Science.
84-87.
2018
-
A square-force cohesion model and its extraction from bulk measurements.
AIChE Journal.
2329-2339.
2018
-
Experimental data for code validation: Horizontal air jets in a semicircular fluidized bed of Geldart Group D particles.
AIChE Journal.
2351-2363.
2018
- The homogeneous cooling state as a verification test for kinetic-theory-based continuum models of gas-solid flows 2017
-
CONTINUUM THEORY FOR RAPID COHESIVE-PARTICLE FLOWS: GENERAL BALANCE EQUATIONS AND DISCRETE-ELEMENT-METHOD-BASED CLOSURE OF COHESION-SPECIFIC QUANTITIES.
Journal of Fluid Mechanics.
345-382.
2017
-
A Tribute to Roy Jackson.
AIChE Journal.
5238-5238.
2017
-
How Nano-Scale Roughness Impacts the Flow of Grains Influenced by Capillary Cohesion.
AIChE Journal.
5250-5257.
2017
-
Intrusive probes in riser applications.
AIChE Journal.
5361-5374.
2017
-
Indirect conduction in gas–solids systems: Static vs. Dynamic effects.
AIChE Journal.
4685-4693.
2017
-
Dynamics of singlet-doublet collisions of cohesive particles.
Chemical Engineering Journal.
380-391.
2017
- CFD-DEM: Modeling the Small to Understand the Large. Chemical Engineering Progress. 38-45. 2017
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Predicting Regolith Erosion during a Lunar Landing: Role of Continuous Size Distribution.
Journal of Aerospace Engineering.
2017
-
Clustering instabilities in sedimenting fluid-solid systems: critical assessment of kinetic-theory-based predictions using direct numerical simulation data.
Journal of Fluid Mechanics.
433-469.
2017
-
Dense versus dilute fluidization of cohesive particles: Reverse sensitivity to friction and restitution coefficient.
Physical Review Fluids.
2017
-
Are continuum predictions of clustering chaotic?.
Chaos: an interdisciplinary journal of nonlinear science.
2017
-
Fluidized-bed measurements of carefully-characterized, mildly-cohesive (Group A) particles.
Chemical Engineering Journal.
259-271.
2017
-
Method of quantifying surface roughness for accurate adhesive force predictions.
Chemical Engineering Science.
140-153.
2017
-
Annulus flow behavior of Geldart Group B particles in a pilot-scale CFB riser.
Powder Technology.
816-828.
2017
-
Development of soft-sphere contact models for thermal heat conduction in granular flows.
AIChE Journal.
4526-4535.
2016
-
A coupled, multiphase heat flux boundary condition for the discrete element method.
Chemical Engineering Journal.
766-773.
2016
-
Cohesive Grains: Bridging Microlevel Measurements to Macrolevel Flow Behavior via Surface Roughness.
AIChE Journal.
3529-3537.
2016
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Linking Micro-Scale Predictions of Capillary Forces to Macro-Scale Fluidization Experiments in Humid Environments.
AIChE Journal.
3585-3597.
2016
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Interpreting Differential Pressure Signals for Particle Properties and Operating Conditions in a Pilot-Scale Circulating Fluidized Bed Riser.
Industrial and Engineering Chemistry Research.
8659-8670.
2016
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Simulations of heat transfer to solid particles flowing through an array of heated tubes.
Solar Energy.
101-115.
2016
-
Fine-particle defluidization: Interaction between cohesion, Young's modulus and static bed height.
Chemical Engineering Science.
266-278.
2016
-
Impact of a binary size distribution on particle erosion due to an impinging gas plume.
AIChE Journal.
984-995.
2016
-
Transport coefficients of solid particles immersed in a viscous gas.
Physical Review E.
2016
-
Quantitative Assessment of Fine-Grid Kinetic-Theory-Based Predictions of Mean-Slip in Unbounded Fluidization.
AIChE Journal.
11-17.
2016
-
A system-size independent validation of CFD-DEM for noncohesive particles.
AIChE Journal.
4051-4058.
2015
-
A conductive heat transfer model for particle flows over immersed surfaces.
International Journal of Heat and Mass Transfer.
1277-1289.
2015
-
New structure-based model for Eulerian simulation of hydrodynamics in gas-solid fluidized beds of Geldart group "A" particles.
Chemical Engineering Science.
22-36.
2014
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Challenges of DEM: I. Competing bottlenecks in parallelization of gas-solid flows.
Powder Technology.
620-626.
2014
-
Challenges of DEM: II. Wide particle size distributions.
Powder Technology.
627-633.
2014
-
Instabilities in granular binary mixtures at moderate densities.
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
2014
-
Kinetic-theory predictions of clustering instabilities in granular flows: beyond the small-Knudsen-number regime.
Journal of Fluid Mechanics.
2014
-
Particle cluster dynamics during fluidization.
Chemical Engineering Science.
39-51.
2013
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Dual role of friction in granular flows: attenuation versus enhancement of instabilities.
Journal of Fluid Mechanics.
484-495.
2013
-
Impact of collisional versus viscous dissipation on flow instabilities in gas-solid systems.
Journal of Fluid Mechanics.
2013
-
Role of collisions in erosion of regolith during a lunar landing..
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
022205.
2013
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Elutriation and Species Segregation Characteristics of Polydisperse Mixtures of Group B Particles in a dilute CFB Riser.
AIChE Journal.
84-95.
2013
-
Enskog kinetic theory for monodisperse gas-solid flows.
Journal of Fluid Mechanics.
129-168.
2012
-
Agglomeration and de-agglomeration of rotating wet doublets.
Journal of Fluid Mechanics.
128-148.
2012
-
Mechanisms for agglomeration and deagglomeration following oblique collisions of wet particles.
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
2012
-
Continuum representation of a continuous size distribution of particles engaged in rapid granular flow.
Physics of Fluids.
2012
-
Assessing a hydrodynamic description for instabilities in highly dissipative, freely cooling granular gases.
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
2012
-
Experimental determination of temperature profiles in a sheared granular bed containing two and three sizes of particles.
Granular Matter.
215-220.
2012
-
Cluster characteristics of continuous size distributions and binary mixtures of Group B particles in dilute riser flow.
Chemical Engineering Journal.
348-358.
2011
-
Instabilities in the homogeneous cooling of a granular gas: A quantitative assessment of kinetic-theory predictions.
Physics of Fluids.
2011
-
Direct numerical simulation of gas-solid suspensions at moderate Reynolds number: Quantifying the coupling between hydrodynamic forces and particle velocity fluctuations.
Powder Technology.
57-69.
2010
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Stokes's Cradle: Newton's Cradle with Liquid Coating.
Physical Review Letters.
2010
-
Stokes' cradle: normal three-body collisions between wetted particles.
Journal of Fluid Mechanics.
479-504.
2010
-
Clustering in rapid granular flows of binary and continuous particle size distributions..
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
021302.
2010
-
Characterization of clusters in rapid granular flows..
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
021304.
2009
-
Initial rates of aggregation for dilute, granular flows of wet particles.
Physics of Fluids.
2009
-
Newton's cradle undone: Experiments and collision models for the normal collision of three solid spheres.
Physics of Fluids.
2008
-
Evidence of higher-order effects in thermally driven rapid granular flows.
Journal of Fluid Mechanics.
429-450.
2008
-
On the role of the Knudsen layer in rapid granular flows.
Journal of Fluid Mechanics.
73-92.
2007
-
Rapid nickel oxalate thermal decomposition for producing fine nickel metal powders Part 2: Global kinetics.
Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing.
13-25.
2006
-
Thermophoretic deposition of aerosol particles in laminar tube flow with mixed convection.
Journal of Aerosol Science.
715-734.
2006
-
An experimental study of thermophoretic deposition of aerosol particles in laminar tube flow with mixed convection.
Aerosol Science and Technology.
178-188.
2006
-
Size segregation in gas-solid fluidized beds with continuous size distributions.
Chemical Engineering Science.
6658-6673.
2005
-
Engineered particle processing.
Powder Technology.
61-61.
2005
-
On the role of non-equipartition in the dynamics of rapidly flowing granular mixtures.
Journal of Fluid Mechanics.
207-232.
2005
-
Size segregation in rapid, granular flows with continuous size distributions.
Physics of Fluids.
1-13.
2004
-
Three-dimensional, rapid shear flow of particles with continuous size distributions.
Powder Technology.
7-12.
2003
-
Analysis of the rapid carbothermal reduction synthesis of ultra-fine silicon carbide powders.
Aerosol Science and Technology.
1087-1098.
2002
-
Kinetic temperatures for a granular mixture.
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
2002
-
Intrinsic reaction and self-diffusion kinetics for silicon carbide synthesis by rapid carbothermal reduction.
Journal of the American Ceramic Society.
2273-2280.
2002
-
The effects of continuous size distributions on the rapid flow of inelastic particles.
Physics of Fluids.
1972-1984.
2002
-
Simulations of a binary-sized mixture of inelastic grains in rapid shear flow..
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
031301.
2002
-
Inelastic collapse in simple shear flow of a granular medium..
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics.
061308.
2001
-
Experimental measurements of gas-particle flows in large-scale strippers.
Chemical Engineering Science.
118087-118087.
2022
Teaching
courses taught
-
CHEN 4650 - Particle Technology
Primary Instructor - Fall 2018
Aims to identify the important physical mechanisms occurring in processes involving particles, formulate and solve mathematical descriptions of such processes, and analyze experimental and theoretical results in both a qualitative and quantitative manner. Teaches students to apply this knowledge to the design of particulate systems. Conveys the breadth and depth of natural and industrial applications involving particulates. Same as CHEN 5650. -
CHEN 5650 - Particle Technology
Primary Instructor - Fall 2018
Aims to identify the important physical mechanisms occurring in processes involving particles, formulate and solve mathematical descriptions of such processes, and analyze experimental and theoretical results in both a qualitative and quantitative manner. Teaches students to apply this knowledge to the design of particulate systems. Conveys the breadth and depth of natural and industrial applications involving particulates. Extra work required for graduate course. Same as CHEN 4650. -
CHEN 5838 - Special Topics in Chemical Engineering
Primary Instructor - Fall 2020
Graduate-selected topics courses offered upon demand. May be repeated up to 6 total credit hours. -
CHEN 5919 - Special Topics in CHBE
Primary Instructor - Spring 2018
May be repeated up to 5 total credit hours.
Background
education and training
- Ph.D., Carnegie Mellon University 1997
- B.S., Ohio State University 1991
awards and honors
International Activities
geographic focus
- Europe Continent
- Italy Country
- Netherlands Country
- Spain Country
- United Kingdom Country