Department

Specific Topics of Interest

•  Multiphase flows
•  Indoor air pollution
•  Outdoor air pollution
•  Lung/nose deposition
•  Turbulence modeling
•  Aerosol transport and deposition
•  Electro-hydrodynamic flows
•  Particle and fiber adhesion and removal
•  Chemical-Mechanical Polishing
•  Surface cleaning
•  Gas filtration
•  Sprays
•  Nanoparticle transport
•  CO2 sequestration
•  Natural gas production form hydrate dissociation
•  Three phase slurry reactors
•  Micro-contamination control
•  Vibration isolation
•  Vibration control of space structures
•  Base isolation of buildings   

Professional Experience

•  Co-Director, Center for Air Resources Engineering and Science (CARES), Clarkson University.
•  Board Member, Center for Advanced Materials Processing, CAMP, Clarkson University.
•  Chairman, Department of Mechanical and Aeronautical Engineering, Clarkson University (1991-1994).
•  Clarkson Distinguished Professor, Department of Mechanical and Aeronautical Engineering, Clarkson University (2001-Present).
•  Robert R. Hill '48 Professor, Department of Mechanical and Aeronautical Engineering, Clarkson University (2003-Present).
•  Professor of Mechanical and Aeronautical Engineering, Clarkson University (1981-2001).
•  Chairman of Graduate Committee, Department of Mechanical and Aeronautical Engineering, Clarkson University (1985-1991, 1997-Present).
•  Faculty Research Participant, Federal Energy Technology Center (DOE-NETL), Morgantown, WV (Summer, 1997, 1998, 1999, and 2000)
•  Senior National Research Council Research Associate, Federal Energy Technology Center (DOE-NETL), Morgantown, WV (1995, Summer 1996)
•  Vice-Chairman of Fluid Mechanics and Thermal Science Group, Clarkson University (1983-1988)
•  Visiting Professor, Department of Mechanical Engineering, University of Calgary, Calgary (Feb.-Dec. 1981)
•  Professor of Engineering, Shiraz (formerly Pahlavi) University (1976-1981)
•  Dean of Engineering, Shiraz University (1979-1980)
•  Associate Dean of Engineering, Shiraz University (1975-1977)
•  Academic Visitor, School of Mathematics and Department of Mechanical Engineering, University of Newcastle Upon Tyne, Newcastle (Summer, 1978)
•  Academic Visitor, Department of Civil Engineering, Northwestern University (Summer, 1977)
•  Visiting Professor, Department of Aeronautics, Imperial College, London (Summer, 1976)
•  Visiting Scholar, Department of Civil and Geological Engineering, Princeton University (Summer of 1975)
•  Visiting Scientist, Department of Physics, University of Saskatchewan, Saskatoon (1974-1975)
•  Associate Professor of Engineering, Shiraz University (1972-1976)
•   Assistant Professor of Engineering, Shiraz University (1970-1972)

Administrative Activities

•  Chairman, Department of Mechanical and Aeronautical Engineering, Clarkson University (1991-1993)
•  Dean Search Committee Chair, School of Engineering,Clarkson University (2000-2003)
•  Chairman, Graduate Committee, Department of Mechanical and Aeronautical Engineering, Clarkson University (1985-1991, 1997- Present)
•  Chair, University Graduate Committee (GERIP) (1997-1999)
•  Chairman, Graduate Committee, Department of Mechanical and Aeronautical Engineering, Clarkson University (1985-1991)
•  Vice-Chairman, Fluid Mechanics and Thermal Sciences Group, Clarkson University (1983-1988)
•  Dean of Engineering, Shiraz University, Shiraz (1979-1980)
•  Associate Dean of Engineering, Shiraz University, Shiraz (1975-1977)
•  Member of the Engineering Committee, Research Council of the Ministry of Science and Higher Education of Iran (1977-1979)
•   Head of Administration and Job Evaluation, Shiraz University, Shiraz (1973-1974

Publications

• A. Razani and G. Ahmadi, Mathematical Methods in Engineering and Science, Vol. 1, Shiraz University Press No. 87 (1977).
• G. Ahmadi and A. Razani, Mathematical Methods in Engineering and Science, Vol. 2, Shiraz University Press No. 90 (1977).

Journals (In Press)

1.  Zhang, X. and G. Ahmadi (2011), “Effects of Electrostatic and Capillary Forces and Surface Deformation on Particle Detachment in Turbulent Flows,” Journal of Adhesion Science and Technology, Vol. 25, pp. 1175-1210.
2.  Moghadasa, H., Aboualia, O., Faramarzi,A., and Ahmadi, G. Numerical Investigation of Septal Deviation Effect on Deposition of Nano/Microparticles in Human Nasal Passage, Respiratory Physiology and Neurobiology. Vol. 177, pp. 9-18 (2011).
3.  Salmanzadeh, M., Ahmadi, G., and Rahnama, M., Transport and Deposition of Evaporating Droplets in a Ventilated Environment, Particulate Science and Technology, (In Press).
4.  Shanley, K.T. and Ahmadi, G., A Numerical Model for Simulating the Motions of Ellipsoidal Fibers Suspended in Low Reynolds Number Shear Flows, Aerosol Science and Technology (In Press).
5.  Salmanzadeh, M., Zahedi, Gh., Ahmadi, G., Marr, D. and Glauser, M., Effect of Thermal Plume Adjacent to the Body on the Movement of Indoor Air Aerosol Particles, Journal of Aerosol Science, (Under Review).
6.  Afshar, H., Shams, M., Nainian, S.M.M., and Ahmadi, G., Two Phase Numerical Simulation of Convective Heat Transfer of Cu-Water Nanofluid in a Microchannel, Nanoscale Research Letters (In Press).
7.  Akbar. M., Mansoori, Z, Saffar-Avval, M., and Ahmadi, G., Turbulence Modulation for Gas - Particle Flows in Vertical and Horizontal Channels Using an Eulerian–Lagrangian Approach, International Journal of Heat and Mass Transfer, (In Press).
8.  Aboualia, O., Bayatpour, D., Ghaffariyeh, A., and Ahmadi, G., Simulation Of Flow Field During Irrigation/Aspiration In Phacoemulsification Using Computational Fluid Dynamics, J Cataract Refractive Surgery, Vol. , pp. (2011).
9.  Rafati Salehi, A., Hosseini, S. H., Shojaee, S., and Ahmadi, G., CFD Studies of Pressure Drop and Increasing Capacity in MellapakPlus 752.Y Structured Packing, Chemical Engineering and Technology (In Press).
10.  Dehestani, M., Vafai, A and Mofid, M., and Ahmadi, G., On the Dynamic Response of a Half-Space Subjected to a Moving Mass, Mathematics and Mechanics of Solids (In Press).

Selected Publications

1. F. Behzad, Z. Mansoori, M. Saffar-Avval, H. Basirat Tabrizi and G. Ahmadi, "Thermal Stochastic Collision Model in Turbulent Gas-Solid Pipe Flows," International Journal of Heat and Mass Transfer, Vol. 53 pp. 1175-1182 (2010).
2. S. Azizi, S.H. Hosseini, G. Ahmadi and M. Moraveji, "Numerical Simulation of Particles Segregation in Bubbling Gas-Fluidized Beds," Chemical Engineering & Technology, Vol. 33, pp. 421-432 (2010).
3. D. Crandall, G. Ahmadi and D.H. Smith, "Computational Modeling of Fluid Flow through a Fracture in Permeable Rock," Transport in Porous Media, Vol. 85, pp. 493-510 (2010).
4. S. Jafari, M. Salmanzadeh, M. Rahnama and G. Ahmadi, "Investigation of Particle Dispersion and Deposition in a Channel with a Square Cylinder Obstruction Using the Lattice Boltzmann Method," Journal of Aerosol Science, Vol. 41, pp.198-206 (2010).
5. S.H. Hosseini, G. Ahmadi, R. Rahimi, M. Zivdar and M. Nasr Esfahany, "CFD Studies of Solid Hold-up Distribution and Circulation Pattern in Gas-Solid Fluidized Beds," Powder Technology, Vol. 200, 201-215 (2010).
6. M. Jalaal, E. Esmaeilzadeh and G. Ahmadi, "Numerical Investigation on Effect of Tip Angle on Settling of a Conical Shape Particle," Journal of Numerical Simulations, Vol. 2, 63-77 (2010).
7. A. Moshfegh, M. Shams, G. Ahmadi and R. Ebrahimi, "A New Expression for Spherical Aerosol Drag in Slip Flow Regime," J. Aerosol Science, Vol. 31, pp. 384-400 (2010).
8. M. Hamzehei, H. Rahimzadeh and G. Ahmadi, "Computational and Experimental Study of Heat Transfer and Hydrodynamics in a 2D Gas-Solid Fluidized Bed Reactor," Industrial Engineering and Chemical Research, Vol. 49, pp. 5110-5121 (2010).
9. R. Rafee, H. Rahimzadeh and G. Ahmadi, "Numerical Simulations of Airflow and Droplet Transport in a Wave-plate Mist Eliminator," Chemical Engineering Research and Design, Vol. , pp. (2010).
10. M. Jalaal, D.D. Ganji and G. Ahmadi, "Analytical Investigation on Acceleration Motion of a Vertically Falling Spherical Particle in Incompressible Newtonian Media," Advanced Powder Technology, Vol. 21, pp. 298-304 (2010).
11. M. Hamzehei, H. Rahimzadeh and G. Ahmadi, "Studies of Gas Velocity and Particles Size Effects on Fluidized Bed Hydrodynamics with CFD Modeling and Experimental Investigation," Journal of Mechanics, Vol. 26, pp. 267-278 (2010).
12. J. Marzbanrad and G. Ahmadi, "Hybrid Preview Control of Structures under Earthquake Excitations," Asian J. Civil Engineering, Vol. 10, pp. 57-78 (2009).
13. D. Crandall, G. Ahmadi, M. Ferer and D.H. Smith, "Distribution and Occurrence of Localized-Bursts in Two-Phase Flow through Porous Media," Physica A, Vol. 388, pp. 574-584 (2009).
14. K. Inthavong, J. Tu and G. Ahmadi, "Computational Modelling of Gas-Particle Flows with Different Particle Morphology in the Human Nasal Cavity," J. Computational Multiphase Flows, Vol. 1, pp. 57-82 (2009).
15. O. Abouali, A. Nikbakht, G. Ahmadi and S. Saadabadi, "Three-Dimensional Simulation of Brownian Motion of Nano-Particles in Aerodynamic Lenses," Aerosol Science and Technology, Vol. 43, pp. 205-215 (2009).
16. A. Razmi, B. Firoozabadi and G. Ahmadi, "Experimental and Numerical Approach to Enlargement of Performance of Primary Settling Tanks," Journal of Applied Fluid Mechanics, Vol. 2, pp. 1-12 (2009).
17. A. Moshfegh, M. Shams, G. Ahmadi and R. Ebrahimi, "A Novel Surface-Slip Correction for Microparticles Motion," Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 345, pp. 112-120 (2009).
18. V. Esfahanian, H. Mahmoodi Darian, H. Babazadeh, M. Aghvami, R. Pasandeh, F. Torabi and G. Ahmadi, "Numerical Simulation of Electrolyte Particles Trajectory to Investigate Battery Cover Design Characteristics," Journal of Power Sources, Vol. 191. pp. 139-143 (2009).
19. H. Nasr, G. Ahmadi and J.B. McLaughlin, "A DNS Study of Effects of Particle-Particle Collisions and Two-Way Coupling on Particle Deposition and Phasic Fluctuations," Journal of Fluid Mechanics, Vol. 640, pp. 507-536 (2009).
20. B. Asadi, M.H. Saidi, M. Taeibi-Rahni and G. Ahmadi, "Computational Simulation of Hydrodynamic Convection in Rising Bubble under Microgravity Condition," International Journal of Engineering, Transactions A: Basics, Vol. 22, pp. 295-305 (2009).
21. H. Afshar, M. Shams, S.M.M. Nainian and G. Ahmadi, "Microchannel Heat Transfer and Dispersion of Nanoparticles in Slip Flow Regime with Constant Heat Flux," International Communications in Heat and Mass Transfer, Vol. 36, pp. 1060-1066 (2009).
22. M.H. Saidi, M. Taeibi-Rahni B. Asadi and G. Ahmadi, "Computational Simulation of Marangoni Convection under Microgravity Condition," Scientia Iranica, Transcation B: Mechanical Engineering Vol 16, 513-524 (2009).
23. D. Crandall, G. Ahmadi and D.H. Smith, "Comparison of Experimental and Numerical Two-Phase Flows in a Porous Micro-Model," J. Computational Multiphase Flows, Vol. 1, pp. 325-340 (2009).
24. B. Mousavi Belfeh-Teymouri and G. Ahmadi, "Identification of the Near Wall Collapsing Bubble Jet Using and opposite Secondary Wall," Journal of Fluid Science and Technology, Vol. 3, pp. 207-218 (2008).
25. A. Tamayol, F. Firoozabadi and G. Ahmadi, "Effects of Inlet Position and Baffle Configuration on Hydraulic Performance of Primary Settling Tanks," ASCE Journal of Hydrology, Vol. 134, pp. 1004-1009 (2008).
26. A. Tamayol, F. Firoozabadi and G. Ahmadi, "Determination of Settling Tank Performance using and Eulerian-Lagrangian Method," Journal of Applied Fluid Mechanics, Vol. 1, pp. 43-54 (2008).
27. A.R. Mazaheri, G. Ahmadi and I. Gamwo, "Temperature Distribution in a Demonstration-Scale Filter Vessel With and Without Ash Bridging," Advanced Powder Technology, Vol. 19, pp. 101‑117 (2008).
28. X. Zhang, G. Ahmadi, J. Qian and A. Ferro, "Particle Resuspension and Transport due to Human Walking in Indoor Environments," Journal of Adhesion Science and Technology, Vol. 22, pp. 591-621 (2008).
29. D. Crandall, G. Ahmadi, D. Leonard, M. Ferer and D.H. Smith, "A New Stereolithography Experimental Porous Flow Device," Review of Scientific Instrumentation, Vol. 79, pp. 044501-1-6 (2008).
30. A. Alavinasab, R. Jha, G. Ahmadi, C. Cetinkaya and I. Sokolov, "Computational Modeling of Nano-Structured Glass Fibers," Computational Materials Science, Vol. 44, 622-627 (2008).
31. M.R. Sahebnasagh, V. Esfahanian, S. Gitipour, G. Ahmadi and K. Ashrafi, "Simulation of Plume Patterns Associated with Different Atmospheric Temperature Profiles," Asian Journal of Chemistry, Vol. 20, pp. 6551-6564 (2008).
32. A.Nasrollahi, S.A.A. Salehi Neyshabouri, G. Ahmadi and M.M. Namin, "Numerical Simulation of Particle Saltation Process," Particulate Science and Technology, Vol. 26, pp. 529-550 (2008).
33. M. Rostami, A. Ardeshir, G. Ahmadi and P.G. Thomas, "On the Effect of Gravitational and Hydrodynamic Forces on Particle Motion in a Quiescent Fluid at High Particle Reynolds Numbers," Canadian Journal of Physics, Vol. 86, pp. 791-799 (2008).

Teaching Experience

Undergraduate (Clarkson, Shiraz & Calgary)

•   Fluid Mechanics, Intermediate Fluid Mechanics, Gas Dynamics
•   Statics, Rigid Body Dynamics, Mechanical Vibrations
•   Thermodynamics, Engineering Mathematics

Graduate (Clarkson & Shiraz)

•   Particle Transport, Deposition and Removal
•   Advanced Fluid Mechanics, Theory of Boundary Layer, Mathematical Theory of Turbulence
•   Random Vibrations, Advanced Vibrations
•   Stochastic Processes for Engineers, Theoretical Acoustics
•   Theoretical Methods in Engineering, Numerical Solution of PDE
•   Multiphase Flow Modeling, Fluid Mechanics of Aerosols

Short Courses Given

• Random Vibrations (Worcester, July 1987)
• Fluid Mechanics of Aerosols (San Diego, August 1990)
• Introduction to Fluid Mechanics of Aerosols with Application to Microcontamination Control
  (San Jose, August 1991), (Las Vegas, July 1992), (Chicago, August 1993), (East Brunswick, August 1994)
• Mechanics of Dilute Two-Phase Flows (Sharif University of Technology, June 1992)
• Random Vibrations with Application to Earthquake Engineering (International Institute for Earthquake Engineering and Seismology, June 1992)
• Dilute and Dense Two-Phase Flows (University of Science and Technology of Iran, May-June 1995)
• Random Vibrations with Applications to Earthquake Engineering (Sharif University of Technology, May-June, 1996, and May-June, 1998)
• Risk Assessment with Applications to Earthquake Engineering (Sharif University of Technology, April-May, 1997)
• Turbulence, Aerosols and Two-phase Flows (Lappeenranta University of Technology, Lappeenranta, Finland, January, 1999)
• Two-Phase Flow with Application to Sediment Transport (Sharif University of Technology, April-May 1999)
• Random Vibrations with Applications to Earthquake Engineering (Sharif University of Technology, April-May, 2000)
• Particle Transport Processes in Turbulent Flows - Particle Dispersion and Deposition (Aalborg University, Aalborg, Denmark, May 2-4, 2001)
• Random Vibrations with Applications to Earthquake Engineering (Sharif University of Technology, May 2001)
• Introduction to Turbulent Flows (Sharif University of Technology, June 2002)
• Turbulence Modeling (Shiraz University, May 2003)

Honors and Awards

•   Research Medal for promotion of research, Iran (1975)
•   Alborz Foundation Award for the Distinguished Scientist of Iran (1976)
•   Ministry of Science and Higher Education Award for Excellence in Research, Tehran, Iran (1978)
•   Research Medal, Tehran, Iran (1978)
•   Pi Tau Sigma Distinguished Faculty Award, Clarkson University (1984)
•   University Outstanding Advisor Award, Clarkson University (1986)
•   Pi Tau Sigma Distinguished Faculty Teaching Award, Clarkson University (1986)
•   Personal Computer Curriculum Development Award, Clarkson University (1987)
•   Pi Tau Sigma Distinguished Faculty Teaching Award, Clarkson University (1988)
•   Honorable Mention for Personal Computer Curriculum Development, Clarkson University (1988)
•   University Outstanding Advisor Award, Clarkson University (1988)
•   University Distinguished Teaching Award, Clarkson University (1988)
•   Pi Tau Sigma Distinguished Faculty Teaching Award, Clarkson University (1990)
•   Powder Technology of Japan Award, Tsukuba, Japan (1991)
•   First Honorary Member of Iranian Academy of Science (1996)
•   First Honorary Fellow of Iranian Society of Mechanical Engineers, (ISME) (1996)
•   Fellow of American Society of Mechanical Engineers (ASME) (1997)
•   Fellow of Iranian Society of Civil Engineers (ISCE)(1999)
•  First Clarkson Distinguished Professor , Clarkson University (2001)
•   University Outstanding Advisor Award, Clarkson University (2002).
•   Robert R. Hill '48 Professor of Mechanical and Aeronautical Engineering (2002)