A5089621712- Granular flow and fluidized beds
- Landslides and related hazards
- Particle physics theoretical and experimental studies
- Particle Dynamics in Fluid Flows
- Fluid Dynamics and Heat Transfer
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Tunneling and Rock Mechanics
- Mineral Processing and Grinding
- Belt Conveyor Systems Engineering
- Geotechnical and Geomechanical Engineering
- Additive Manufacturing and 3D Printing Technologies
- Quantum Chromodynamics and Particle Interactions
- Hydrology and Sediment Transport Processes
- GNSS positioning and interference
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Dark Matter and Cosmic Phenomena
- Scientific Research and Discoveries
- Experimental Learning in Engineering
- Inertial Sensor and Navigation
- Heat Transfer and Optimization
- Advanced Battery Technologies Research
- Blood properties and coagulation
Northern Illinois University
2015-2025
Fermi National Accelerator Laboratory
2024
Northwestern University
2006
Massachusetts Institute of Technology
2002
University of Dayton
2000
We investigate the effect of nanoscale variations in surface roughness individual particles on macroscale granular flow characteristics. Experiments were conducted circular rotating tumblers with smooth and rough 2 3 mm steel particles. The beads had a rms approximately 30 to 60 nm; 240 350 nm. dynamic angle repose for increased by 10 degrees 25 over that wide range rotation speeds. Even though affects repose, we unable detect any segregation bidisperse mixtures radial direction...
The flow of granular material in rotating tumblers is confined to a thin flowing layer at the free surface which particle velocity primarily streamwise, perpendicular axis rotation, with minimal axial motion. Particle tracking velocimetry was used measure for 1 and $2\phantom{\rule{0.3em}{0ex}}\mathrm{mm}$ glass particles sand cylindrical various diameters, lengths, rotation rates flat continuously surface. End-wall friction slows streamwise adjacent walls, yet just inward from end wall...
A fundamental characteristic of granular flows is that they are typically restricted to thin layers rapid surface flow. Thus, a complete understanding key for an accurate representation the dynamics entire Experiments were conducted in three-dimensional tumblers: cylindrical tumblers various diameters, double-cone tumbler, and spherical Froude number last two being function local geometry ranging from . Surface velocity measurements 1 mm 2 glass particles obtained using particle tracking...
The characteristics of steady granular flow in quasi-two-dimensional rotating tumblers have been thoroughly investigated and are fairly well understood. However, unsteady time-varying has not studied detail. linear response is presented for periodic forcing protocols via sinusoidal variation the rotational speed tumbler step changes speed. Variations radius, particle size, frequency explored. Similarities to include fastest occurring at free surface flowing layer an instantaneous...
Abstract The Muon g -2 Experiment at Fermilab uses a gaseous straw tracking detector to make detailed measurements of the stored muon beam profile, which are essential for experiment achieve its uncertainty goals. Positrons from decays spiral inward and pass through before striking an electromagnetic calorimeter. is therefore located inside vacuum chamber in region where magnetic field large non-uniform. As such, must have low leak rate maintain high-quality vacuum, be non-magnetic so as not...
Biomass cookstoves are used as a common source of heating and cooking in developing countries with most improved cookstove design focusing on efficiency thermal conversion fuels safer operation than open flame fires. A top-lit-up-draft (TLUD) utilizes gasification process similar to pyrolysis where the solid biomass heated within oxygen-limited environment syngas burned which reduces carbon content particulate matter being introduced into air. The new continuous-operation is described have...
Abstract An ion-drag pump is utilized to enhance the heat transport capacity of micro pipes. analytical model developed estimate maximum as a function applied electric field. The predicts that application an field causes four fold increase in capacity. A transient was permit variation with thermal load. proportional-integral-derivative controller used simulate active temperature control. feasibility achieving control demonstrated experimentally.