Georgios H. Vatistas


BIOGRAPHY

EDUCATIONAL BACKGROUND:

November 1984           

Ph.D. (Mechanical), Dept. of Mechanical Eng.
Concordia University, Montreal
            Thesis title: "Theoretical and Experimental Studies on Confined Vortex Flows"

November 1980

M. Eng. (Mechanical), Dept. of Mechanical Eng.
Concordia University, Montreal
Thesis title: "Computational Flow Prediction in Cyclone Chambers". 

June 1978       

B. Eng. (Mechanical), Dept. of Mechanical Eng.
Concordia University, Montreal

AWARDS:

1987

SAE Ralph R. Teetor Educational Award for Significant
Contributions to Teaching Research and Student Development

1995   

Best Paper Award, ASME The Computers in Engineering Division for the paper entitled "Dynamic Characteristics of Liquid Draining from a Tank in Weightlessness"

ACADEMIC HISTORY:

1994 to present

Professor
Department of Mechanical Engineering,
Concordia University Montreal

1989 to 1994

Associate Professor
Department of Mechanical Engineering,
Concordia University Montreal

1985 to 1989

Assistant Professor
Mechanical Engineering Department, Concordia University, Montreal

ADMINISTRATIVE HISTORY:

2001 to  2004

Associate Dean
Faculty of Engineering and Computer Science,
Concordia University Montreal

1995 to  1998

Associate Dean
Faculty of Engineering and Computer Science,
Concordia University Montreal

 

 

1992 to  1995 

Associate Dean
School of Graduate Studies,
Concordia University Montreal

 

 

1990 to 1992  

Graduate Programme Director
Department of Mechanical Engineering,
Concordia University Montreal


RESEARCH:

DR. VATISTAS' research interests lie in the general area of thermofluids. The central theme of his research activities is however concentrated in fluid dynamics (with emphasis to vortex dynamics) and its industrial applications. Both the fundamental aspects of the discipline, where new knowledge is generated, and industrial applications where the new knowledge is put into use to improve designs are considered.


1. Research Projects Pursued

i. Fundamentals of Vortex Dynamics

ii. Applications of Vortex Flows

iii. Fundamentals of Fluid Mechanics

iv. Behavior of Liquids in Zero Gravity Conditions

v. Dynamics of Liquid Sloshing

vi. Fluid Mechanics of Human Physiology
 
 

2. Summary of Research Accomplishments
 

i. Vortex Dynamics

Derived a theoretical model relating the main fluid dynamic properties (core size and static pressure drop) in vortex chambers.

Established similitude relationships for strongly swirling flows.

Derived a new theoretical model for multi-celled vortices.

Discovered experimentally several core equilibrium states in disk-like and columnar liquid vortices.

Extended Kelvines theory on vibrations of vortex columns to fluids of finite radial extend.

Described the vortex flow evolution through spectral development.

Elaborated on the concentration of very fine slits in concentrated vortices.

Contributed on the improvement of the relationship between the size of the perturbation and the vortex pair structure for converging shocks.
 
 

ii. Liquid Sloshing

Contributed to the development of a numerical code to investigate the dynamic behavior of liquid sloshing in heavy vehicle-liquid tankers.

Studied the dynamics of liquids in a microgravity environment.
 
 

iii Purely Accelerating or Decelerating Flows

Developed approximate solutions for the flow between two disks

Developed approximate solutions for the purely polar flow within two spheres

Derived approximate and exact solutions for converging and diverging flow in narrow conical passages.
 
 

iv. Fluid Mechanics of Human Physiology

Showed that the areas known to be prone to arteriosclerosis are those under the influence of a considerable spatial wall shear variations, and suggested a theory for the progression of the disease.

Studied the flow in Endotracheal tubes.
 
 

 

4. A Sample of Journal Publications

 

Abderahmane H.A. and Vatistas G.H. “ An Accurate Low Dimensional Model for the

waves on Thin layer Fluid Flowing Down an Inclined Plane”. Journal of Applied Mechanics-

Transactions of 76(6) Article 064501, NOV 2009.

 

Zheng T. H., Vatistas G.H., and Tang, S. K. “Effect of Turbulence on Sound Radiation

by Vortex-Body Interaction”. J. Comput. Acoust. 17(1) 71-81, (2009).

 

Zheng T. H., Povitsky A., Vatistas G.H. “Vortex-Generated Sound in Flow about

Spinning Cylinders”. J. Comput. Acoust 16(4) 577- 599, (2008).

 

Vatistas G.H., Abderrahmane H.A., Siddiqui K. “The dynamic similarity between

polygonal satellite vortices and electron columns in a Malmberg-Penning trap”.

Plasma Physics and Controlled Fusion 50(12) 124047 (2008).

 

Vatistas G.H., Fayed M., Soroardy J.U. Strongly swirling turbulent sink flow between

two stationary disks. J. Propul. Power, 24(2) 295-301 (2008).

 

Abderahmane H.A., and Vatistas G.H. “An accurate model for the thin film flow”.

Acta Mech Sin 24 (4) 375-380 (2008).

 

Abderrahmane H.A., Vatistas G.H. “Effects of uniform and constant electromagnetic

fields on the stability of thin layer of liquid metal flow”. Fusion Engineering and Design

83(4) 661-666 (2008).

 

Chen T.F., Vatistas G.H., Lin S. “Particle paths of Lagrangian velocity distribution

simulating the spiral arms of Galaxy M51”. Journal of Thermal Science 17(1) 61-63 (2008).

 

Vatistas, G. H., Ait-Abderrahmane, H.and Siddiqui, K. M. H. “Experimental

Confirmation of Kelvin’s Equilibria.” Phys. Rev. Lett. 100(17) 174503(2008).

 

Ait Abderrahmane, H., and Vatistas G. H. “Improved two-equation model for thin layer

fluid flowing down an inclined plane problem”, Phys. Fluids 19, 098106 (2007).

 

Vatistas, G. H. “A comment on “Surface switching of rotating fluid in a cylinder” Phys.

Fluids 18, 101701 (2006)]”, Phys. Fluids 19: 069101 (April 2007).

 

Zheng, T. H., Vatistas, G.H., and Povitsky, A. “Sound generation by a street of vortices

in a nonuniform flow, Phys. Fluids 19: 037103 (March 2007).

 

Aboelkassem Y., and Vatistas G.H. “New model for compressible vortices,” J. Fluid

Eng.-ASME, 29(8): 1073-1079, (August 2007).

 

Aboelkassem, Y. and Vatistas G. H. “On the refracted patterns produced by liquid

vortices”, Acta Mech Sin 23: 11–15, (2007).

 

Vatistas G.H., Chen D. K, Chen T. F., and Lin S. “Prediction of infiltration rates

through an automatic door”, Appl. Therm. Eng., 27 (2-3): 545-550, (2007).

 

Jawarneh A.M., Sakaris P., Vatistas G.H. “Experimental and analytical study of the

pressure drop across a double-outlet vortex chamber”, J. Fluid Eng.-ASME 129 (1): 100-

105, (2007).

 

Jawarneh, A. M. and Vatistas, G. H. Reynolds stress model in the prediction of

confined turbulent swirling flows”, J. Fluid Eng.-ASME 128 (6): 1377-1382, (2006).

 

Zheng T. H, Vatistas G. H, Povitsky A. “Sound generation by one-cell and two-cell

vortices in a nonuniform flow”, J. Comp. Accoust. 14 (3): 321-337, (2006).

 

Vatistas G.H. “The optics of the compressible N=2 vortex”, Trans.CSME 30 (1): 143-

166, (2006).

 

Vatistas G.H. and Aboelkassem, Y. “Space-time analogy of self-similar intense

vortices”, AIAA J., 44 (4): 912-917, (2006).

 

Vatistas G.H. and Aboelkassem, Y. “Extension of the incompressible n=2 vortex into

compressible”, AIAA J., 44 (8): 1912-1915, (2006).

 

Vatistas, G. H. “Simple model for turbulent tip vortices”, J. Aircraft, 43 (5): 1577-1579,

(2006).

 

Vatistas G. H. and Ait Abderrahmane, H. “Visualization of Kelvin waves activity in

the hollow vortex”, Journal of Visualization, 9(4): 360-360 (2006).

 

May D. H. and Vatistas, G. H. “Tip vortex dependence with angle of attack”, J. Aircraft,

43 (5): 1582-1585, (2006).

 

Vatistas, G.H., Ghaly, W. and Tsifourdaris, P. “Swirling inflow within the narrow gap of

two disks”, J. Propul. Power, 21 (4): 743-750, (2005).

 

Vatistas, G.H., Jawarneh, A.M., and Hong, H. “Flow characteristics in a vortex

chamber”, Can. J. Chem. Eng., 83 (3): 425-436 (June 2005).

 

Jawarneh, A.M., and Vatistas G.H. “The effect of inlet conditions on the pressure drop

in a confined vortex chamber”, J. Propul. Power, 21 (6): 1128-1133 (2005).

 

Vatistas G.H., Aboelkassem, Y, and Siddiqui, M.H.K. “Time Decay of n family of Vortices”.

AIAA J, 43 (6): 1389-1391 (2005).

 

Zheng, T.H., Vatistas, G.H., and Povitsky, A. “Effects of non-linearity on sound

generation and propagation in a non-uniform flow”, Trans. CSME, 29 (1): 57-65 (2005).

 

Jawarneh, A.M., Vatistas G.H., and Aboelkassem, Y. “Experimental investigation of the

pressure drop in a sink-swirl flow within two disks”, J. Propul. Power, 21 (4): 759-760

(2005).

 

Aboelkassem, Y., Vatistas, G. H., and Esmail, N. “Viscous dissipation of Rankine vortex

profile in zero meridional flow”. Acta Mech Sinica, 21(6): 550-556 (2005).

 

Povitsky, A., Zheng, T.H, and Vatistas, G.H. “Effect of vortex profile on sound

generation in a non-uniform flow”, Math. Comput. Simulat., 65 (4-5): 447-468 (2004).

 

Vatistas, G.H. “The fundamental properties on the n = 2 vortex model”, Trans. CSME,

28 (1): 43-58 (11 2004).

A Sample of Conference Publications

 

Ait Abderrahmane H., K. Siddiqui and G.H. Vatistas “On the Dynamics of the

Polygonal Satellite vortices”. Proceeding Fluids Engineering Division Summer Meeting,

August 2-5, 2009,Colorado, USA.

 

Ait Abderrahmane H., K. Siddiqui and G.H. Vatistas Synchronization in Kelvin

equilibria Proceeding 22th Canadian Congress of Applied Mechanics, 2009.

 

Ait Abderrahmane H. and Vatistas G.H. Influence of magnetic and electrical fields on a

thin layer of electrically conducting liquid, the 22nd International Congress of

Theoretical and Applied Mechanics (ICTAM2008) Adelaide, Australia August 24 – 30,

2008.

 

Ait Abderrahmane, H. and, Vatistas, G. H. Three-equation Model for a Thin Layer Fluid

Flowing Down an Inclined Plane. Paper no. AIAA 2007-3983, 37th AIAA Fluid

Dynamics Conference and Exhibit 37th AIAA Fluid Dynamics Conference and Exhibit

25 - 28 June 2007, Miami, FL.

 

Ait Abderrahmane, H. and, Vatistas, G. H. Stability of Thin Layer of Electrically

Conducting Fluid Flowing Down An Inclined Plane under the Action of Transversal

Magnetic Field. Paper no. AIAA-2007-451, 38th AIAA Plasma dynamics and Lasers

Conference In conjunction with the16th International Conference on MHD Energy

Conversion, 25 - 28 June 2007, Miami, FL.

 

Vatistas, G.H. and Ait Abderrahmane, H. Symmetry Braking Phenomena in Vortices

with an Interface. CANCAM 2007, June 3-7, Ryerson University Toronto, Ontario

CANADA.

 

Ait Abderrahmane, H. and Vatistas, G.H Improved Two Equations Model for Thin

Film Flow down an Inclined Plane. CANCAM 2007, June 3-7, Ryerson University

Toronto, Ontario CANADA.

 

Vatistas G.H. “Vortices in Homer’s Odyssey - A Scientific Approach”. SCIENCE AND

TECHNOLOGY IN HOMERIC EPICS, SPAP Conference Centre, Ancient Olympia,

Greece, 27-30 August 2006.

 

Ait Abderrahmane, H., Kamran Siddiqui, K., and Vatistas, G. H. Kelvins equilibria in

hollow vortex core. 59th Annual Meeting of the Division of Fluid Dynamics November

19 - 21, 2006 Meeting ID: DFD06 Tampa Bay, Florida.

 

Vatistas G.H., Aboelkassem, Y., and Siddiqui, M.H.K. “On the Space-Time Duality of

Intence Vortices”, AIAA, 35th AIAA Fluid Dynamics Conference and Exhibit, Toronto,

Ontario, paper no. AIAA 2005-5159, Jun. 6-9, 2005.

 

Zheng, T. H., Vatistas, G.H., and Povitsky, A. “Sound Generation by Street of Vortices

in a Non-uniform Flow,” AIAA, 35th AIAA Fluid Dynamics Conference and Exhibit,

Toronto, Ontario, Paper no. AIAA 2005-5160, Jun. 6-9, 2005.

 

Jawarneh, A.M., Vatistas G. H., and Aboelkassem Y. “Effect of Vortex Generators in

Confined Swirl Flow”. AIAA, 35th AIAA Fluid Dynamics Conference and Exhibit,

Toronto, Ontario, paper no. AIAA-2005-4651, Jun. 6-9, 2005.

 

Jawarneh, A.M., and Vatistas G. H. “Experimental and Numerical Study of Turbulent

Confined Swirling Flow”. Proceeding of the Second International Exergy, Energy and

Environment Symposium (IEEES2) conference, paper no. IEEES2-197, Kos, Greece,

3-7 July 2005.

 

Jawarneh A.M., and Vatistas G. H. “Vortex Chamber Flows”, AIAA 2nd International

Energy Conversion Engineering Conference, Providence, Rhode Island, paper no.

AIAA-2004-5620, Aug. 16 -19, 2004.

 

Zheng, T. H., Vatistas, G. H., and Povitsky, A. “Nonlinear Analysis of Sound

Generation in a Non-Uniform Flow”, Proceedings of the 4th International conference on

fluid mechanics, Dalian, China July 19-23, 547-550, 2004.

 

Vatistas, G. H. “The Art and Science of Engineering Education”. Paper presented at

CSME International Conference on the Future of Engineering Education, February 16-

18, 2003, Concordia University, Montreal, Canada.

 

Povitsky, A., Zeng T., and Vatistas G.H. “Effect of Vortex Profile on Sound Generation

in a Non-Uniform Flow”, Lecture Notes In Computer Science, Springer-Verlag,

Heidelberg, Vol. 2668/2003, January 2003, pp. 826-836.

 

Povitsky, A., Zeng T., and Vatistas G.H. “Numerical Study on Propagation and

Scattering of Sound by Two Cylinders”, Presented at the 4th CAA Workshop on

Benchmark Problems, Ohio Aerospace Institute in Cleveland, Ohio, U.S.A., October 20-

22, 2003.

 

Zeng T., Vatistas G.H., and Povitsky, A., “Sound Generation by Vortex Stretching in a

Non-Uniform Flow”, Presented at the Division of Fluid Dynamics 56th annual Meeting,

East Rutherford, New Jersey, November 23-25, 2003.

 

Tsifourdaris, P., Vatistas, G.H., and Ghaly, W.S. “An Experimental Study on the Flow

Within Two Disks”, paper accepted for the 11th International Conference on

Computational Methods and Experimental Measurements. 12-14 May 2003, Halkidiki,

Greece.

 

Other

 

Vatistas, G.H., "Double Vortex", Letter to the Editor, New Scientist, 18 December 1993, p.50.

 

Vatistas, G.H, "Floating Body Dynamics Inside Whirlpools Found in Mythology and Literature"

 

Vatistas, G.H, "Floating Body Dynamics Inside Whirlpools Found in Mythology and Literature"(Greek Text)


COURSES:
 
Courses Taught

(i) Kinetic Theory of Gases, MECH 610 (graduate)

(ii) Fluid Mechanics I, ENGR 361 (undergraduate)

(iii) Fluid Mechanics II, MECH 361 (undergraduate)

(iv) Thermodynamics I, ENGR 251 (undergraduate)

(v) Numerical Methods in Engineering, EMAT 391 (undergraduate)

(v1) Engineering Project, ENGR 481 (undergraduate)

(v1i) Fluid Mechanics, ENGR 620 (graduate)
 
 

Courses to Teach in the Academic Year 1998-1999

June 1, 1998 to November 30, 1998 Administrative leave.
   

Winter 1998/99

Fluid Mechanics II MECH 361/4 (undergraduate)

Numerical Methods in Engineering EMAT 391/4 (undergraduate)