Associate Head (Research)
Dr.-Ing. Lehrstuhl für Strömungs mechanic
Preferred method of communication
- Flow control and machine learning
- Flow-induced vibrations
- Renewable energy (energy harvesting)
Bluff-body wakes and aerodynamics
Fundamental focus is on developing low-order models of the dynamics of turbulent bluff body wakes. This work aims to understand the influence of body shape and on-coming flow on: (i) aerodynamic loading on structures; (ii) mixing properties of the wake and (iii) turbulence characteristics. Low-order models are developed to model the wake dynamics and predict loading and mixing characteristics. The physics of vortex structure interactions and inter-scale energy exchanges is investigated for the purpose of the role of large-scale instabilities in the generation of turbulence and dispersion of scalar quantities (temperature or contaminants). The experimental research includes development of optical diagnostic techniques, vortex and feature identification techniques and real-time visualizations for virtual environments.
Remote-sensing and advanced monitoring
Semi-empirical and analytical techniques are developed for real-time estimation of flow dynamics and large-scale forces from sensor data obtained from locations removed from the flow domain or body of interest. Briefly, estimation algorithms are trained using experimental or CFD data to predict flow behaviour in full-scale environments. Examples of applications include: prediction fluctuating wind patterns in the wake of large structures from a small number ground measurements, flow patterns in large scale vessels based on wall-pressure measurements, prediction of flow-induced vibrations in pipelines or bridges; or wind gusts based on wall measurements.
Flow control and machine learning
The objective of the work is to develop model-free closed-loop flow control strategies. The basic principle is based on genetic search algorithms and evolutionary algorithms to guide actuation of flow control devices to achieve drag reduction, mixing control or manipulation of unsteady forces. In this context, genetic programming is used to design the controller, a mathematical model describing how to use a sensor signal to guide the actuation signal, to achieve a desired effect. Examples include suction and/or blowing at critical locations on a body surface to reduce drag or increase mixing. The techniques are well suited for multi-objective optimization. An important aspect of this work is robust implementation in real systems and reliability.
Professor Robert Martinuzzi, P. Eng. and Fellow of the ASME, is a Pratt & Whitney Canada Research Fellow and Professor of Fluid Mechanics.
His fundamental area of research is the physics of turbulent, separated flows. His research strategy includes the development of reduced or low-order models for inter-scale energy transfer dynamics and applications to flow control as well as developing strategies for machine learning control. He is an expert in non-intrusive experimental techniques, especially in optical velocimetry (PIV, LDV). His work focuses on transport phenomena in bluff-body wakes, turbulent wakes, remote-sensing and fluid-structure interactions.
Dr. Martinuzzi's applied research focuses on unsteady load predictions on structures, closed-loop control of separated wakes vortex-induced vibrations, aerodynamics in high-speed aviation compressors and power turbines as well as scouring and erosion in river systems.
Binham, C., Raibaudo, C., Morton, C. and Martinuzzi, R. J., (accepted, Sept 23, 2018), “Suppression of fluctuating lift on cylinder via evolutionary algorithms: control with interfering small cylinder,” Phys. Fluids, Manuscript: POF18-AR-0171.
Kindree, M.G., Shahroodi, M., Martinuzzi, R.J., 2018, “Low-frequency dynamics in the turbulent wake of cantilevered square and circular cylinders protruding a thin laminar boundary layer,” Exp. Fluids 59:186 https://doi.org/10.1007/s00348-018-2641-x.
Riches, G., Martinuzzi, R., Morton, C., 2018, “Proper orthogonal decomposition analysis of a circular cylinder undergoing vortex-induced vibrations,” Phys. Fluids 30: 105103 doi 10.1063/1.5046090.
Bingham, C., Morton, C., Martinuzzi, R.J., 2018, “Influence of control cylinder placement on vortex shedding from a circular cylinder,” Exp. In Fluids 59:10 : DOI: 10.1007/s00348-018-2615-z
Graziani, A., Kerherve, F., Martinuzzi, R.J., Kiersbulk, L., 2018, “Dynamics of the recirculating areas of a forward-facing step,”Exp. In Fluids 59:154,doi.org/10.1007/s00348-018-2608-y
Morton, C., Martinuzzi, R.J., Kindree, M., Shahroodi, M., Saeedi, M., 2018, “Wake dynamics of a cantilevered circular cylinder of aspect ratio 4,” Int. J. Heat & Fluid Flow 72: 109-122.
Chen, Z., Martinuzzi, R.J., 2018, “Shedding of dual structures in the wake of a surface-mounted low aspect ratio cone,” Phys. Fluids, 30, 045107: doi:10.1063/1.5018485
Mohamed, M. A., Sherry, M., du Plessix, P. Wood, D.H., Martinuzzi, R.J., 2018, “Measurements to Assess Simple RANS Model Behaviour in Stagnating Flow,” Int. J. Heat & Fluid Flow, 70, 226-236.
Hemmati, A., Wood, D. H., Martinuzzi, R.J., 2018, “On simulating the flow past a normal thin flat plate,” J. Wind Eng. & Ind. Aero. 174, 170-187.
Maleki, M., Martinuzzi, R.J., Herzog, W., Federico, S., 2017, “Orthotropic hydraulic permeability of arrays of parallel cylinders,” Phys. Rev. E, 96: 033112 (11p.).
Mohebi, M., du Plessix, P., Martinuzzi, R.J., Wood, D. H., 2017, “Effect of thickness-to-chord ratio on the wake of two-dimensional rectangular cylinders,” Phys. Rev. Fluids 2: 064702 (33 pages).
Mohebi, M., Wood, D.H., Martinuzzi, R.J., 2017, “The turbulence structure of the wake of a thin flat plate at post-stall angles of attack,” Exp. In Fluids, 58:67 (18 pages).
Kannaiyan, R., Mahinpey, N., Kostenko, V., Martinuzzi, R.J., 2017, “Enhanced Delignification of Wheat Straw by the Combined Effect of Hydrothermal and Fungal Treatments,” Chem. Eng. Communications, 204:803-812.
Erfan, I., Hajialimohammdadi, A., Chitsaz, I., Ziabasharhagh, M., Martinuzzi, R.J., 2017, “Influence of back pressure and injected-gas properties on jet characteristics of a multi-hole high pressure gaseous injector,” Fuel 197: 186-193.
Hemmati, A., Wood, D.H., Martinuzzi, R.J., 2016, “Characteristics of distinct flow regimes in the wake of an infinite span normal thin flat plate,” Int. J. Heat & Fluid Flow, 62:423-436.
Hemmati, A., Wood, D.H., Martinuzzi, R.J., 2016, “Effect of side-edge vortices and secondary induced flow on the wake of normal thin flat plates,” Int. J. Heat & Fluid Flow, 61: 197-212.
Hosseini, Z., Martinuzzi, R.J., Noack, B. R., 2016, “Modal energy flow analysis of a highly modulated wake behind a wall-mounted pyramid,” J. Fluid Mech. 798:717-750.
Ali, S., Elliot, K.J., Savory, E., Zhang, C., Martinuzzi, R. J., Lin, W.E., 2016, “Investigation of the Performance of Turbulence Models with Respect to High Flow Curvature in Centrifugal Compressors,” Trans. ASME, J. Fluids Eng. J. Fluids Eng. 138(5) 051 101, 10 pgs.
El Hassan, M., Bourgeois, J. A., Martinuzzi, R. J., 2015, “Boundary layer effect on the vortex shedding of wall-mounted rectangular cylinder,” Exp. in Fluids 56 (2):33.
Hosseini, Z., Martinuzzi, R. J., Noack, B. R., 2015, “Sensor-based estimation of the velocity in the wake of a low-aspect-ratio pyramid,” Exp. in Fluids 56 (1):13.
Kannaiyan, R., Martinuzzi, R.J., Kostenko, V., Mahinpey, N., 2015, “Nutrient Media Optimization for Simultaneous Enhancement of the Laccase and Peroxidases Production by Co-culture of Dichomitus Squalens and Ceriporiopsis Subvermispora,” Biotechnology and Applied Biochemistry, 62 (2), 173-185, DOI: 10.1002-bab. 1263
Dol, S.S., Salek, M.M., Martinuzzi, R.J., 2014, “Energy Redistribution between the Mean and Pulsating Flow Field in a Separated Flow Region,” Trans. ASME, J. Fluids Eng. 136, 111105:1-9.
Kannaiyan, R., Mahinpey, N., Martinuzzi, R.J. Kostenko, V. , 2014, “Induction and Suppression of Dichomitus sqaulens and Ceriporiopsis subvermispora Peroxidase Activity by Manganese Sulfate in Response to Carbon and Nitrogen Sources,” Can. J. Chem. Eng., 92: 779-786.
Dol, S.S., Salek, M.M., Martinuzzi, R.J., 2014 “Effects of Pulsation to the Mean Field and Vortex Development in a Backward-Facing Step Flow,” Trans. ASME, J. Fluids Eng. 136:011001:1-6.
Kostenko, V., Martinuzzi, R.J., Hareland, G., 2014, “Pseudomonas putida Biofilm Facilitates Fine Solids, Water and Oil Separation from Oil Sands Tailings,” J. Scientific Research & Reports (JSSR.2014.004) 3(1): 110-129.
Bourgeois, J. A., Noack, B. R., Martinuzzi, R. J., 2013, “Generalized phase averaging of the wall-mounted square cylinder wake,” J. Fluid Mech 736: 316-350.
Hosseini, Z., Bourgeois, J. A., Martinuzzi, R. J., 2013, “Large Scale Structures in Dipole and Quadrupole Wakes of a Wall Mounted Finite Rectangular Cylinder,” Exp. in Fluids 54: 1595-1610, DOI 10.1007/s00348-013-1595-2.
Kostenko, V., Martinuzzi, R. J., Hareland, G., 2013, “Impact of Oil-Based Fluids Emulsification on Tolerance and Hydrocarbon-Degrading Potential of Ralstonia picketti and Alcaligenes piechandii,” J. Petroleum & Environmental Boiotechnology, 4 (2), 140, 1-7, doi: 10.4172.216101459-10000140.
El Hassan, M., Assoum, H.J. Martinuzzi, R., Sobolik, V., Abed-Meraim, K., Sakout, A., 2013, “Experimental investigation of the Wall Shear Stress in a circular orifice impinging jet,” Physics of Fluids, 25, 0077101:1-10; doi: 10.1063/1.4811172
Assoum, H. H., El Hassan, M., Abed-Meraim, K., Martinuzzi, R., Sakout, A., 2013, “Experimental analysis of the aero-acoustic coupling in a plane impinging jet on a slotted plate,” Fluid Dynamic Research, 45 (4), 045503: 1-15 (http://dx.doi.org/10.1088/0169-5983/45/4/045503).
Rosi, G. A., Rival, R.E., Martinuzzi, R.J., 2013, “A Conditional Analysis of Spanwise Vortices within the Lower Atmospheric Log Layer,” J. Wind Eng. & Ind. Aero. 119, 89-101.
Dol, S. S., Azimov, U., Martinuzzi, R.J., 2012, “Statistical Description in the Turbulent Near Wake of a Rotating Circular Cylinder,” World Academy of Sience, Eng. & Tech. 72 (12), 537-541.
Sattari, P., Rival, D. E., Martinuzzi, R.J., Tropea, C. , 2012, “Growth and Separation of start-up vortex from a two-dimensional shear layer,” Physics of Fluids 24 (10) 107101:1-14.
Kannaiyan, R., Mahinpey, N., Mani, T., Salak Asghari, F., Martinuzzi, R. J., Kostenko, V., 2012, , “Enhancement of Dichomitus squalens and Ceriporiopsis subvermispora Laccase Activity via Simultaneous Effects of Copper, Carbon and Nitrogen Sources,” Biochemical Engineering Journal, 67, 140-147.
Araujo, T.B., Sicot, C., Boree, J., Martinuzzi, R. J. 2012, “Influence of Obstacle Aspect Ratio on Tripped Cylinder Wakes,” Int. J. Heat and Fluid Flow, 35, 109-118.
Bourgeois, J. A., Sattari, P, Martinuzzi, R. J. 2012, “Coherent vortical and straining structures in the finite wall-mounted square cylinder wake,” Int. J. Heat and Fluid Flow, 35, 130-140.
Sattari, P., Bourgois, J. A., Martinuzzi, R.J., 2012, “On the Vortex Dynamics in the Wake of a Finite Surface Mounted Square Cylinder,” Exp. in Fluids 52(5), 1149-1167: DOI: 10.1007/s00348-011-1244-6.
Salek, M., Sattari, P., Martinuzzi, R.J. 2012, “Analysis of Fluid Flow and Wall Shear Stress Patterns Inside Partially-Filled Agitated Culture Well Plates,” Annals of Biomedical Engineering, 40 (3), 707-728, DOI: 10.10439-011-0444-9
Bourgeois, J. A., Sattari, P., Martinuzzi, R.J., 2011, “Alternating half-loop shedding in the phase averaged wake of a finite surface-mounted square cylinder with thin boundary layer,” Physics of Fluid 23 (9), 095101-1:15, DOI:10.1063/1.3623463
Hosseini, Z., Ramirez-Serrano, A., Martinuzzi, R.J., 2011, "Ground/Wall Effects on a Tilting Ducted Fan," International Journal of Micro Air Vehicles,” 3(3), pp. 119-143.
Kayla D. Viegas, Sharul S. Dol, Mohammad M. Salek, Robert D. Shepherd, Robert J. Martinuzzi, Kristina D. Rinker, 2011, “Methicillin Resistant Staphylococcus aureus adhesion to Human Umbilical Vein Endothelial Cells demonstrates wall shear stress dependent behaviour,” Biomedical Engineering OnLine 10: 20, doi:10.1186/1475-925X-10-20.
Savory, E., Martinuzzi, R.J., Ryval, J., Li, Z., Blissit, M., 2011, “Evaluation of the thermofluid performance of an automotive engine cooling fan system motor,” Proc. Inst. Mech. Eng. Vol. 225; Part D, J. Auto. Eng. 74-89.
Bourgeois, J.A., Martinuzzi, R.J., Savory, E., Zhang, C., Roberts, D.A., 2011, “Assessment of Turbulence Model Predictions for an Aero-Engine Centrifugal Compressor Using the Mixing Plane Approach,” Trans. ASME J. Turbomachinery Vol. 133, 011025-1:011025-15.
Kostenko, V., Lyczak, J., Yin, H., Turner, K., Martinuzzi, R. J., 2010, “Impact of Silver-Containing Wound Dressings on Bacterial Biofilms Behavior Depends on Treatment Longevity,” J. Antimicrobials Agents and Chemotherapy 54 (12), 5120-5131.
Bordenave, S., Kostenko, V., Dutkoski, M., Grigoryan, Al, Martinuzzi, R.J., Voordouw, G., 2010, “Relationship between the activity of Anaerobic Microbial Populations in Oil Sands Tailing Ponds and the Densification of Tailings,” Chemosphere 81, 663-668.
Kostenko, V., Salek, M., Sattari, P., Martinuzzi, R. 2010, “Staphylococcus aureus Biofilm Formation and Tolerance to Antibiotics in Response to Oscillatory Shear Stresses of Phsyiological Levels,” FEMS Immun Med Microbiol 59, 421-431.
Goulet, G.C., Coombe, D., Martinuzzi, R.J., Zernicke, R. F., 2009, “Validation and iterative coupling to poroelastic problems in bone fluid flow,” Bulletin of Applied Mechanics, 5(17), 6-17.
Jones, S., Dang, T., Martinuzzi, R.J. , 2009, “Use of quorum sensing antagonists to deter the formation of crystalline Proteus mirabilis biofilms,” Int. J. Antimicrobial Agents 34(4), 360-64.
Salek, S. M., Jones, S., Martinuzzi, R. 2009. “The Influence of Flow Cell Geometry related shear stresses on the Distribution, Structure and Susceptibility of Pseudomonas aeruginosa 01 Biofilms,” Biofouling, 25 (8), 711-725.
Goulet, G.C., Coombe, D., Martinuzzi, R.J., Zernicke, R. F., 2009, “Poroelastic Evaluation of Fluid Movement Through the Lacunocanalicular System,” Annals of Biomedical Engineering, Vol 37 (7), 1390-1402; doi:10.1007/s10439-009-9706-1
Tan, Z., Zhang, H., Abedi, J., Yu, B., Martinuzzi, R. 2009, “Development of a New High Efficiency Simple Structure Cyclone,” Canadian J. of Chem. Eng., 87, 343-349.
Goulet, G.C., Cooper, D. M. L., Coombe, D., Martinuzzi, R., Zernicke, R. F., 2008, “Influence of Vascular Porosity on Fluid Flow and Nutrient Transport in Loaded Cortical Bone,” J. Biomechanics, 41(10), 2169-2175.
Martinuzzi, R.J., 2008, “Dual Vortex Structure Shedding from Low Aspect Ratio, Surface-Mounted Pyramids,” J. Turbulence (9) N28, 1-16.
Yerly, J., Hu, Y., Martinuzzi, R.J., 2008, “Biofilm structure differentiation based on multiresolution analysis,” Biofouling, (24:5 323-337).GDIF-2007-0046.
Abu-Ramadan, E., Dybenko, J., Savory, E., Hunt, A. G., and Martinuzzi, R.J. 2008, “Stator and Support Arm Aerodynamic Performance for Automotive Engine Cooling Fans with Realistic Inlet Conditions,” SAE 2007 Trans. J. of Passenger Cars – Mechanical Systems, 116-6, Selected Paper 2007-01-0769.
Dol, S.S., Martinuzzi, R., and Kopp, G.A., 2008, “The Suppression of Periodic Vortex Shedding from a Rotating Cylinder,” J. Wind Eng. & Ind. Aero., 96, 1164-1184.
Csiba, A., and Martinuzzi, R., 2008, “Investigation of Bluff Body Asymmetry on the Properties of Vortex Shedding,” J. Wind Eng. & Ind. Aero., 96, 1152-1163.
AbuOmar, M., and Martinuzzi, R., 2008, “Vortical Structure around Pyramid in Thin Boundary Layer,” J. Wind Eng. & Ind. Aero., 96, 769-778.
Gholamreza-Kashi, S., Martinuzzi, R.J., Baddour, R.E., 2008, “Comparison of the Far-Field Turbulence Structure of a Rectangular Surface Jet to Three-Dimensional Free and Wall Jets,” ASCE J. Engineering Mechanics, 134, 3, 224-233.
Kostenko, V., Ceri, H., Martinuzzi, R.J., 2007, “Increased Tolerance of Staphylococcus aureus to Vancomycin in Viscous Media,” FEMS Immunol. and Med. Microbiol 51, 277-288.
Martinuzzi, R., AbuOmar, M., and Savory, E., 2007, “Experimental Study of the Pressure Field Around Surface-Mounted Pyramids and Other Bluff Bodies,” Trans. ASME, J. Fluids Eng. 129, 1147-1156.
Yerly, J., Hu, Y., Jones, S.M., and Martinuzi, R. , 2007 “A Two-step Procedure for Automatic and Accurate Segmentation of Volumetric CLSM Biofilm Images,” Journal of Microbiological Methods 70, pp. 424-433.
Baran, O., Drozd, J.J., Martinuzi, R.J., Poole, P. H., 2007, “Granular Circulation in a Cylindrical Pan: Simulations of reversing radial and tangential flows,” Phys. Rev. E. 76 (2) 021305-1-9
Harrison, J.J., Rabiei, M., Ceri, H., Yerly, J., Martinuzzi, R.J., Turner, R.J., 2007, “Metal ions may signal or suppress cellular differentiation in Candida tropicalis biofilms,” Applied and Environmental Microbiology., Aug. 2007, 73 (15), 4940-4949.
Mian, M.H., M., Yanful, E.K., Martinuzzi, R., 2007, “Measuring the onset of cohesive mine tailings erosion,” Can. Geotechnical Journal, 44 (4), 473-489.
U. Shah, J. Zhu, C. Zhang, F. Wang, Martinuzzi, R.J., 2007, “Validation of a numerical model for the simulation of an electrostatic powder coating process,” Int. J. Multiphase Flow 33, 557-573.
Gholamreza-Kashi, S., Martinuzzi, R.J., Baddour, R.E., 2007, “Mean Flow Field of a Non-buoyant Rectangular Surface Jet,” ASCE J. Hydraulic Engineering, 133, No. 2, 234-239.
Jones, S.M., Yerly, J., Hu, Y., Ceri, H. and Martinuzzi, R.J., 2007, “Structure of Proteus mirabilis biofilms grown in artificial urine and standard laboratory media,” FEMS Microbiology Letters, 268, 16-21.
Harrison, J.J., Yerly, J., Ceri, H., Stremick, C.A., Hu, Y., Martinuzzi, R.J., Turner, R.J.,( 2006), “Use of three-dimensional visualization to investigate microbial biofilm structure,” Biological Procedures Online, 8(1), 194-215.
Baddour, R.E., Zaghloul, A., Martinuzzi, R., (2006), “Properties of Plane surface-Jets in Deep and Shallow Currents,” ASCE J. Hydraulic Engineering., April 2006, 363-370.
Sistla, P., Baran, O., Fohanno, S., Chen, Q., Poole, P.H. and Martinuzzi, R.J. (2005), “Bulk motion in granular matter in a cylindrical agitated bed,” Physical Review E 71-011303-1-12.
Wang, F., Martinuzzi, R., Zhu, J., (2005), “Experimental Study of Particle Trajectory in Electrostatics Powder Coating Process,” Powder Technology 150, 20-29.
Martinuzzi, R.J. and Havel, B., 2004, “Vortex Shedding from Two Surface-Mounted Cubes in Tandem,” International Journal of Heat and Flow, 25, 364-372.