Marios Valavanides, PhD

 Professor (Hydraulics and Flow in Porous Media)

Manager, ImProDeProF,  Hydraulics Lab

Dept. Civil Engineering, University of West Attica 

CV (6p)     Extended CV     Publication List

SCOPUS   ORCiD  Web of Science  ResearchGate

 

Studies

• Ph.D. (Fluid Mechanics), University of Patras, Dept of Chemical Engineering, Laboratory of Physicochemical Hydrodynamics & Transport Phenomena (1998). PhD Thesis title: “Macroscopic Theory of Two-phase Flow in Porous Media based on Integration of Pore Scale Phenomena”. Supervisor: Prof. A.C. Payatakes (http://thesis.ekt.gr/11044)  
• Post-graduate Specialization (in Composite Materials), University of Patras, Dept. of Mechanical & Aerospace Engineers, Lab. of Applied Mechanics. (1991) “Damage Tolerance in Advanced, Thermoplastic Composite Aerospace Constructions”   
• Diploma in Mechanical Engineering, University of Patras (1989)

Research

Interests:

Fluid mechanics and, in particular, physics and multi-scale modeling of two-phase flow in porous media, continuum mechanics, and mechanics of composite materials. Main research activities are focused on the development of the DeProF theory for steady-state two-phase flow in porous media (Valavanides, 2018).

My current research efforts are towards expanding the fractional flow theory to account for flow rate dependency and towards the recovery of the universal, relative permeability and energy efficiency maps for two-phase flow in porous media. In that context, I am also implementing energy efficiency criteria to develop a normative methodology for the effective characterization of flows (capillary/viscous) and pore networks (rock typing). Updates available at the ImproDeProF webpage.

Expeditions:

• “Two-Phase Flow in Porous Media: Improvement of the Mechanistic Model DeProF and Implementation in Practical Applications” Contractor: TEI Athens MlS 379389, NSRF Grant Budget: 100,0k€, Duration 2012-2015, Scientific Manager M.S. Valavanides (http://users.uniwa.gr/marval/ImproDeProF.html)
• "Laboratory validation of Flow-Dependent Relative Permeability Scaling for steady-state two-phase flow in micro-fluidic pore networks" in collaboration with Univ. of Stuttgart/MIB. Matched funding by DAAD and SPWLA (2022) : http://users.uniwa.gr/marval/ImproDeProF.htm

International Collaborations:

• The Norwegian Center of Excellence (2017 - ), NTNU & UiO, focusing on the physics of porous media using experimental, theoretical and computational methods (www.porelab.no), Collaborative Partner
• The University of Stuttgart, Inst. of Applied Mechanics (https://www.mib.uni-stuttgart.de/) 
• Founding Member of the Hellenic InterPore National Chapter

Teaching

Undergraduate:   @ UniWA: "Fluid Mechanics", "Hydraulics", "Open Channel Hydraulics", "Experimental Hydraulics", "Land Reclamation & Irrigation", "Management of Construction Equipment",  Hydraulics Lab

Postgraduate:   @ Hellenic Open Univ.: "Construction Project Management" ,     @ Engineer Officers’ Technical School (EOTS): "Fluid Mechanics & Applied Hydraulics"

Selected publications (Publication List)

1. Valavanides, M.S. (2023) “Flowrate Dependency of Steady-State Two-Phase Flows in Pore Networks: Universal, Relative Permeability Scaling Function and System Characteristic Invariants." Transp. in Porous Media 150, 521:557, https://doi.org/10.1007/s11242-023-02012-5
   
2. Karadimitriou, N., Valavanides, M.S., Mouravas, K., Steeb, H. (2023) "Flow Dependent Relative Permeability Scaling for Steady-State, Two-Phase Flow in Porous Media: Laboratory Validation on a Microfluidic Network" Petrophysics 64 (5), pp. 656-679, https://doi.org/10.30632/PJV64N5-2023a4, http://users.uniwa.gr/marval/publ/Karadimitriou_etal_Petrophysics2023.pdf
   
3. Valavanides, M.S., Mascle, M., Youssef, S., Vizika, O. (2020) "Steady-State Two-Phase Flow in Porous Media: Laboratory Validation of Flow Dependent Relative Permeability Scaling", E3S Web of Conferences 146, 03002, The Intern. Symp. of the Society of Core Analysts, SCA2019, https://doi.org/10.1051/e3sconf/202014603002
4. Valavanides, M.S. (2018) "Review of steady-state two-phase flow in porous media: independent variables, universal energy efficiency map, critical flow conditions, effective characterization of flow and pore network" Transp. in Porous Media 123 (1), pp. 42-99, https://doi.org/10.1007/S11242-018-1026-1
5. Valavanides, M.S. (2018) "Oil fragmentation, interfacial surface transport and flow structure maps for two-phase flow in model pore networks. Predictions based on extensive, DeProF model simulations." Oil & Gas Science and Technology - Rev. IFP Energies nouvelles 73 (6), pp. 1-36, https://doi.org/10.2516/ogst/2017033 also http://users.uniwa.gr/marval/publ/Valavanides_OGST_73_2018.pdf  
   
6. Valavanides, M.S., Daras, T. (2016) “Definition and Counting of Configurational Microstates in Steady-State Two-Phase Flows in Pore Networks” Entropy 18 (054), pp. 1-28, http://www.mdpi.com/1099-4300/18/2/54, http://dx.doi.org/10.3390/e18020054
   
7. Valavanides, M.S., Totaj, E., Tsokopoulos, M. (2016) “Energy Efficiency Characteristics in Steady-State Relative Permeability Diagrams of Two-Phase Flow in Porous Media” Journal of Petroleum Science and Engineering 147, pp. 181-201 http://dx.doi.org/10.1016/j.petrol.2016.04.039
8. Valavanides, M.S. (2012) “Steady-State Two-Phase Flow in Porous Media: Review of Progress in the Development of the DeProF Theory Bridging Pore- to Statistical Thermodynamics- Scales” Oil & Gas Science and Technology 67(5) pp. 787-804, http://dx.doi.org/10.2516/ogst/2012056
   
9. Paipetis, S.A., Polyzos, D., Valavanidis, M. (1993) “Constitutive relations of periodic laminated composites with anisotropic dissipation” Archive of Applied Mechanics, 64, pp. 32-43, http://dx.doi.org/10.1007/BF00792342