FLUID MECHANICS LABORATORY



FML/UoP is one of the main laboratories of Mechanical Engineering and Aeronautics Department, founded in 1975, and covers all the educational needs in the area of Fluid Mechanics and its Applications (Fluid Dynamics, Turbomachinery, Aerodynamics, Computational Fluid Dynamics, and Multi-Phase Flows).
 

Educational Activities
· Fluid Mechanics I & II
· Turbomachinery and Aerodynamics
· Natural Gas Technology
· Two-Phase Flow in Pipes and Boundary Layers
· Aerodynamics and Gasdynamics
· Advanced Fluid Mechanics
· Fluid Mechanics and Turbomachinery Laboratory
· Computational Fluid Dynamics
· Experimental Fluid Dynamics
· Multi-Phase Flows
· High Velocity and Rarefied Gas Flow
 
Areas and Topics of Research Activities
Aeronautics:

AERODYNAMICS:
· Fixed-wing and Rotary-wing Aerodynamics including interaction effects
· Aircraft Design and Optimisation
· Wind Tunnels Design, Optimisation, Calibration and Utilisation

AEROACOUSTICS:
· Acoustics and related Aerodynamics (Propellers/Rotors, Engines)
· Noise Source (Identification, Prediction and Reduction)

Turbomachinery:
· Flowfield analysis in Turbomachines (Compressors and Turbines)
· Fans, Blowers and Hydraulic Machines (Design and Optimisation)

Applied Fluid Dynamics:

WIND ENGINEERING
· Wind effects on structures
· Wind Turbines (Aerodynamic Design and Optimisation, Performance Calculations and Testing)

INDUSTRIAL FLUID DYNAMICS
· Internal Flow Systems (Pipe Networks in Steady/Unsteady flow, Flowfield Analysis into the components of the system)
· Multi-Phase Flows (Gas-Liquid-Particle flow in Pipes and Networks)
· Fluid-Thermo Analysis in Energy Systems
 

Current Research
The current activities of FML/UoP cover the following areas of research:
· The research projects and parallel activities in Aerodynamics concern the flow field analysis of helicopter rotors using numerical simulation techniques which will be validated by wind tunnel measurements, in order to develop a powerful computational code for optimised design of rotary wings.
· The research in Two-Phase Flows and Artificial Lift is more targeted to Oil-Natural Gas flow. Flow regimes analysis, separation processes and computational fluid dynamics techniques for two-phase flow field analysis in complex geometries, as well as optimum design of Air-Lift Pump installation, are the topics of interest. The developed integrated computational code is very powerful and user's friendly tool for multiphase flow analysis.
· The research in Steady and Unsteady Gas Pipeline Flow concerns the analysis of flow in transport pipelines and networks with application to hydrocarbon transport and distribution. Transport properties estimation systems combined with flow regimes and transient phenomena analysis are the topics of interest.
· Basic and applied research in Drying Processes covers the area of agricultural products drying (grapes, potatoes, tomatoes carrots). Advanced models, developed for the simulation of individual product drying process, combined with computational fluid dynamics techniques, are applied to the flow field analysis and flow manipulation in order to design more effective dryers.
 
Computer Facilities
· One (1) minicomputer Prime 2350 that provides an access up to 8 users under UNIX environment
· Six (6) Pentium 330 MHz
· Four (4) 486 IBM Compatible
· Several Peripherals (Laser and Ink-Jet Printers, Scanners, Plotters, etc.)
· FML/UoP computing capabilities are expanded, when required, by direct access to the mainframe systems and Workstations of the Computer Technology Institute of the University of Patras.
 
Developed Simulation Codes and CFD
FML/UoP uses the well-known CFD code PHOENICS developed by CHAM for the numerical simulation of single and two-phase flow phenomena and in parallel develops its own codes, which are very good tools for specific flow problems analysis. A sample of the developed and used codes is given below:


· PHOENICS, a general purpose CFD code by CHAM
· EMPF, an extended multi-phase flow analysis code
· AIRLIFT, an optimum design code for air-lift pump installations
· SOLAIR, a gas-particle two-phase flow analysis code
· TPES, transport properties estimation system
· SEPAR, flow field analysis of gas-liquid two-phase flow in baffle type separators
· ETNA, steady and unsteady flow analysis in complex pipe flows
· TRANS, transient phenomena analysis in pipelines
· DRYPRO, drying processes analysis and optimum design of dryers
· HELIC, flow field analysis of a helicopter rotor
 

Experimental Facilities:
· Low speed Wind Tunnel that provides a max. velocity of 40m/s into an octagonal test section (0.50mx0.50m).
· Low speed Wind Tunnel with a 2-D test section (0.2mx1.0m) of open or closed type (max. velocity 30m/s), mainly used for boundary layer and jet flows research works.
· Low speed Wind Tunnel with a max. velocity of 25m/s into a square test section (0.25mx0.25m), used for educational purposes.
· Pneumatic Transport Facility for research and education in Gas- Particle flows.
· Air-Lift Pump installation for research activities.
· Horizontal and Vertical Air-Water flow installation for research in two-phase flow.
· Steady and Unsteady Pipeline flow installation for research activities.
· Network simulation facility for research in Natural Gas transportation and distribution.
· Several facilities used exclusively for educational purposes in the areas of Fluid Mechanics and Turbomachinery.

The FML/UoP is mainly supported by its own workshop and when required by the Main Workshop of the Mechanical Engineering and Aeronautics Department.
 

Measuring Instrumentation:
There is a considerable experience, accumulated over the last twenty years in measuring techniques utilising advanced instrumentation such as Hot-Wire Anemometer, Laser-Doppler Velocimeter as well as Data Acquisition Systems. Data analysis and reduction being the post processing of any experimental work is well established since the FML/UoP capabilities were tested recently for a huge amount of data, in the framework of research projects supported by the European Community.
 
Personnel:
Scientific Staff:

· D. G. Papanikas, Professor, Dr.-Ing., Director
· D. P. Margaris, Assistant Professor, Dr.-Eng.
· P. A. Tsimoraga, Assistant, Dipl. of Mathem.

Secretaries:

· E. Dimitracopoulou
· G. Dimitracopoulou

Scientific Researchers:

· D. C. Fertis, Dr.- Eng.
· A.-G. Ghiaus, Dr.-Eng.
· A. I. Spyropoulos, Dipl.- Eng.
· E. S. Tentis, Dipl.- Eng.
· A. P. Fragias, Dipl.- Eng.
· V. Samaras, Dipl.- Eng.
· N. Tachos, Dipl.- Eng.
· S. Loukopoulos, Msc., Dipl.- Eng.
· K. Dodis, Dipl. of Physics

External Scientific Collaborators:

· A. E. Filios, Dr.-Eng.
· I. G. Koligiannis, Dipl.- Eng.
· A. Z. Protopsaltis, Dipl.- Eng.
· P. A. Papagiannidis, Dipl.- Eng., MSc.
· N. B. Vlachopoulos, Dipl.- Eng.,MSc.
 

Address:
University of Patras
Mechanical Engineering & Aeronautics Dept.
Fluid Mechanics Laboratory
GR-26500, Rio-Patras, Greece

Tel. : +30 61 997193
Fax : +30 61 997201
Tel/Fax:+30 61 997202
e-mail: fml@mech.upatras.gr