Sheldon I. Green, P.Eng.
Professor and Head
B.A.Sc. (University of Toronto), M.A.Sc., Ph.D. (Caltech),
FASME, FCAE, Member TAPPI
ph: (604) 822-0497
fx: (604) 822-2403
email: green@mech.ubc.ca
lab website: Applied Fluid Mechanics Laboratory
Research Interests
Fluid Mechanics
- Papermaking
- Industrial Sprays
- Biomechanics
- Building Ventilation
Current Research Work
- Over the past few years, Professor Green’s primary area of interest has been pulp and paper fluid mechanics. Paper is formed by taking a very dilute suspension of pulp fibres and hydrodynamically filtering the suspension, thus producing a mat of fibres. In one very common papermaking process, gap forming, dewatering of the pulp suspension occurs by passing two porous fabrics under tension, with the pulp suspension between them, over rotating rolls or fixed blades. This process is very interesting because the mechanics of the forming fabric are coupled with the fluid mechanics of the pulp suspension and the deposited fibre mat. The goal of this research is to develop a model of the fibre deposition and dewatering process. This research is funded by NSERC and AstenJohnson.
- A research initiative is underway, under the lead of Professor Olson, to minimize electrical power consumption in paper mills. My emphasis in this large project is to monitor, and improve, the efficiency of pulp pumps.
- Research in biomechanics is proceeding along two fronts. Professor Fels from Electrical Engineering, a graduate student, and I are working to develop a computer model of human vocalization. Professor Grecov, a graduate student, and I are developing experimental tools to detect urethral obstruction.
- In collaboration with Kelsan Technologies, fundamental studies of the flow of Newtonian and non-Newtonian liquids in a pressure atomizer are being performed. These studies have shed light into why fouling of such atomizers may occur when spraying railroad friction modifier.
Selected Publications
Montgomery, J., Green, S.I., and Vanerek, A., “Effect of applied vacuum box suction on Overall Retention in Hand Sheet Forming”, Nordic Pulp and Paper Research Journal, vol. 25, no. 4, pp. 463-472, 2010.
Li, L.K.B., Green, S.I., Davy, M., and Eadie, D.T., “Air-blast atomization of viscoelastic liquids in a cross-flow, Part 1: Spray Penetration and Dispersion”, accepted for publication in Atomization and Sprays, October 2010.
Li, L.K.B., Green, S.I., Davy, M., and Eadie, D.T., “Air-blast atomization of viscoelastic liquids in a cross-flow, Part 2: Droplet velocities”, accepted for publication in Atomization and Sprays, October 2010.
Vakil, A. and Green, S.I., “Flexible Fiber Motion in the Flow Field of a Cylinder”, accepted for publication in International Journal of Multiphase Flow, August 2010.
Lillquist, E. and Green, S.I., “The Discipline Dependence of Citation Statistics”, Scientometrics, vol. 84, pp. 749–762, 2010.
Vakil, A. and Green, S.I., “Drag and Lift Coefficients of Inclined Finite Circular Cylinders at Moderate Reynolds Numbers”, Computers and Fluids, vol. 38, no. 9, pp. 1771-1781, October 2009.
Derrick, D.J., Anderson, P., Gick, B., and Green, S.I. “Characteristics of air puffs produced in English ‘pa’: Experiments and Simulations”, Journal of the Acoustical Society of America, vol. 25, no. 4, pp. 2272-2281, April 2009.
