Εργαστήριο Ρευστομηχανικής & Στροβιλομηχανών

Διευθυντής Εργαστηρίου

Νίκος Πελεκάσης, Καθηγητής

Ιστότοπος Εργαστηρίου

Γενικά
History

The Laboratory of Fluid Mechanics & Turbomachines (LFMT) is one of the first laboratories of the University of Thessaly, founded in 1995 by Presidential Decree PD50/95. The Laboratory is equipped with scientific equipment suitable for teaching, research and service provision.

Objective & Activities

The focus of LFMT is on phenomena and effects of flow of fluids and polymers by using experimental measurements and computational modeling. The specific fields acting the LFMT lab are gas-thermodynamics, combustion, atmospheric pollution, natural flows and all process including flow and transport phenomena in one-phase or multiphase flows.

 

The activities of LFMT involve:

 

  • Dynamics and stability of films drops and bubbles in the presence of acoustic, adhesive and elastic forces – Interfacial rheology of coated microbubbles – Application in Biomechanics and Diagnostic Imaging via Ultrasound
  • Magneto-hydrodynamic stability–Flow Control and Optimization of Heat Transfer in the presence of Lorentz, viscous and adhesive forces – Application in the design of a porous structure (CPS) used as protective coating
  • Study of instabilities in flows, turbulence and chaos
  • Develop of mathematical and numerical models for the studying of flows and transport phenomena
  • Study of turbulence structure with PIV anemometry
  • Flow velocity and turbulent characteristics measurements with Hot Wire Anemometry
  • Flow velocity and turbulent characteristics measurements with Laser Doppler velocimetry
  • Study of turbulence with PIV techniques
  • MHD laminar and turbulent modelling
  • Droplet impingement on solid surfaces
  • Liquid jet atomization and breakup
  • Spray flow interaction
  • Development of optical diagnostics for flow measurement
  • Micro-Scale Flows in Fibrous Media
  • Flow through Dual-Scale Porous Media
  • Transport across filled systems
  • Realistic Modeling of Polymer/Composites Manufacturing Operations
 
Acoustic signature of an adhered microbubble

Schematic diagram of the envisioned CPS flow arrangement in the pore level
 
Distribution of interstitial fluid speed in a dual porosity fibrous material
 
Droplet Splashing on inclined surface

 

  
Ερευνητικές Δραστηριότητες
· Support of Young Researchers Program       2019-
“Numerical and theoretical investigation of the production of microbubbles with a surfactant coating via a flow focusing microfluidic device” Research project funded by The Greek Secretariat of Research with a budget of  75000 €. It is targeted towards the development of the theoretical/numerical tools that are essential for the design and optimal operation of a microfluidic device dedicated to the fabrication of such bioparticles.
  
· NIARXOS Foundation Scholarship                                                                                          2018-
“Interaction between a coated microbubble and a nearby wall- Effect of viscoelastic, intermolecular and acoustic forces” Research Project funded by the Niarxos Foundation with a budget of 50000 €. It is targeted towards the investigation of different numerical tools, to evaluate and distinguish the acoustic signatures of coated microbubbles in adhesion and free circulation in narrow capillaries.
  
· ARISTEIA  I                                                                                                                    2012-2015

“Characterization of Contrast Agents for Medical Imaging and Drug Delivery with Ultrasound via Theoretical & Numerical Analysis of Static & Dynamic Response”. Research project funded by the Greek Ministry of Education, carried out by the group led by Dr. Pelekasis as Coordinator. The total funding was 325000 € and covered the salaries of 2 PhD candidates and 3 Post Docs. Details on the activities of the project are provided in the wiki http://contrast-aristeia.mie.uth.gr/wiki/.

The ARISTEIA I project provided convincing evidence regarding the mechanical behaviour of coated microbubbles as well as ways to obtain reliable estimates of their viscoelastic properties via static and acoustic measurements and the corresponding static and dynamic response patterns. The NIARXOS and Young Researcher Projects are essentially continuations of the ARISTEIA project, aiming at establishing the basis for successful implementation of such bioparticles in novel biomedical modalities.

 
· EUROFUSION, WPDTT1-LM5    2011-

“Modelling activities of liquid metal PFC (Plasma Facing Components) solutions”. Participation in the EUROPEAN fusion project and the Work Package WPDTT1 dedicated to the use of liquid metals as plasma facing components in the divertor region of fusion reactors; funding ~25000 € per year. Dr. Pelekasis is the coordinator of the activity that focuses on the modelling of a capillary porous system (CPS) as a means to deliver liquid metal to the interface with plasma. 

  
 

   

PROJECTS

Title:Programme of controlled thermonuclear fusion, Association EURATOM – Hellenic Republic Code:ΕΕ2425/EURATOM
Funding:European Union (EURATOM) – GSR&T Budget:60,000Euro/year €
Partners:UTH (N. Vlachos-Sci.Resp., D. Valougeorgis, N. Pelekasis, D. Vavougios), NTUA, Democritus, U.Athens, U.Ioannina, FoRTH, AUTh, U.Crete, U.Cyprus Responsible: 
Duration:2000 – 2008  
 
Εκπαιδευτικές Δραστηριότητες

Προπτυχιακά Μαθήματα: επι του παρόντος, τα παρακάτω μαθήματα διδάσκονται από προσωπικό του Εργαστηρίου:

Επιπλέον, το προσωπικό του Εργαστηρίου έχει διδάξει κατά καιρούς τα παρακάτω μαθήματα:

Επίσης, το προσωπικό του Εργαστηρίου έχει διδάξει κατά καιρούς τα παρακάτω Μεταπτυχιακά Μαθήματα

Υποδομή - Εξοπλισμός

Laboratory Equipment

The Laboratory of Fluid Mechanics & Turbomachinery is equipped with experimental and computational equipment capable of carrying out fundamental and industrial research.

LFMT staff has access to scientific instruments for carrying out high precision measurements applicable to various kinds of flow arrangements. Moreover, it is equipped with two clusters for parallel computing and relevant accessory equipment. It has developed in house CFD software and has access to the commercial computational fluid dynamics package ANSYS/FLUENT, used for simulations of many applied fluid flows and heat transfer problems.

Experimental Equipment

  • Subsonic wind tunnel with a 50x70x300cm working section and speed up to 30 m/s
  • TSI Laser Doppler Anemometer (LDA)
  • TSI Particle Image Velocimeter (PIV)
  • DANTEC Hot Wire Anemometer
  • AA Lab Systems Hot Wire Anemometer
  • Aerometrics Phase Doppler Particle Anemometer (PDA)
  • Schlieren for compressible flow visualization

Software Packages

  • ANSYS/FLUENT
Προσωπικό

Πελεκάσης Νικολαος (Διευθυντής Εργαστηρίου)  

Καθηγητής, Διδακτορικό Δίπλωμα’91 State University of New York at Buffalo, USA
Computational Fluid Dynamics
Τηλ:+30 24210 74102 Email: pel(AT) mie.uth.gr
Περισσότερες Πληροφορίες | CV | Δημοσιεύσεις
  

Παπαθανασίου Αθανάσιος  (Καθηγητής)

Καθηγητής, PhD’91 McGill University, Canada
Multi Scale Composites and 2D materials; Manufacturing; Structure/Property Correlations in fibrous and flake composites
Τηλ:+30 24210 74013 Email: athpapathan (AT) mie.uth.gr
Περισσότερες Πληροφορίες | CV | Δημοσιεύσεις
  

Χαραλαμπους Γεώργιος  (Αναπληρωτής Καθηγητής)

PhD’09 Imperial College London, UK
Thermofluid Processes with Energy Applications
Τηλ:+30 24210 74077
Email: georgios.charalampous (AT) uth.gr
Περισσότερες Πληροφορίες | CV | Δημοσιεύσεις
  

Σταματέλλου Αντιόπη-Μαλβίνα (Επιστημονική Συνεργάτης, Διδάκτωρ)

Δρ. Μηχανολόγος Μηχανικός 
Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης
Τηλ:+30 24210 74053
Email: malvina (AT) uth.gr
Περισσότερες Πληροφορίες | CV | Δημοσιεύσεις
  

Στρατάκης Γεώργιος  (Διδάσκων ΠΔ 407/80)

Δρ. Μηχανολόγος Μηχανικός
Πανεπιστήμιο Θεσσαλίας
Email: gstrat (AT) uth.gr
Περισσότερες Πληροφορίες | CV | Δημοσιεύσεις
  
 
Αντιπροσωπευτικές Δημοσιεύσεις
Διατριβές – Εργασίες
Doctoral (PhD) Theses
  1. Nikolaos Tsantouklas “Experimental and numerical investigation of Gas Jets in turbulent environments” (Advisor G. Charalampous) [2023]
  2. E. Benos, ‘First principles study of the static arrangement of a plasma facing component in the form of a capillary porous system (cps)”, 2018 (Advisor N. Pelekasis).
  3. A. Lytra, “Numerical & theoretical study of the static response of coated microbubbles subject to uniform and distributed load-application on the estimation of the shell elastic properties”, 2017, (Advisor N. Pelekasis).
  4. P. Kapsalis, ‘Control of boundary layer transition, delay of separation and optimization of airfoil performance, using active flow control’, 2016 (Advisor N. Vlachos)
  5. K. Efthimiu “Boundary element study of the interaction between a coated bubble and a nearby surface due to an acoustic disturbance”, 2015, (Advisor N. Pelekasis).
  6. D. Dimopoulos, ” Computational/theoretical study of 3d MHD stability of free convection flows in ducts”, 2013 (Advisor N. Pelekasis).
  7. A. Iatridis, “Study of Magnetohydrodynamic turbulent flow and heat transfer in ducts of Fusion reactors: Flow transition”, 2012 (Advisor N. Vlachos)
  8. M. Vlachomitrou ” Numerical study of boundary layer interaction with a growing liquid film over a solid surface” (Advisor Ν. Pelekasis) [2008]
  9. Sotiris C. Kakarantzas “Magneto-hydrodynamic convection with internal heat sources in cylindrical ducts” (Advisor Ν. Vlachos) [2008]
  10. Cristos D. Dritselis “Study of gas-particles turbulent two-phase flow in ducts” (Advisor Ν. Vlachos) [2007]
  11. Dimitris Κ. Fidaros “Mathematical simulation and study of magneto-hydrodynamic flows in curvilinear geometries” (Advisor Ν. Vlachos) [2007]
  12. Costas Α. Tsiglifis “Numerical study of bubble dynamics in the environment of acoustic excitation” (Advisor Ν. Pelekasis) [2006]
  13. Manolis Alygizakis “Study of mixing phenomena via large flow structures and turbulence in liquid-gas interfaces” (Advisor H. Stapountzis) [2005]
  14. Vasilis P. Kambanis “Interaction of wing wakes with application to the behavior of wind turnbines” (Advisor H. Stapountzis) [2004]
  15. Catherine Α. Baxevanou “Navier-Stokes model of aeroelastic stability of wind turbine windes in stall conditions”(Advisor Ν. Vlachos) [2003]
  16. Ioannis Ε. Sarris “Simulation of flow and transport henomena in glass melting tanks” (Advisor Ν. Vlachos) [2001]
  17. George Ν. Κoutlas “Simulation of flow and transport phenomena during titanium carbide depostion with the LCVD method” (Advisor Ν. Vlachos) [2001]