Δημήτρης Ραζής

ΠΡΟΣΦΕΡΟΜΕΝΑ ΜΑΘΗΜΑΤΑ

Δημήτρης Ραζής

Δημήτρης Ραζής

Ο Δημήτρης Ραζής διαθέτει δίπλωμα μηχανολόγου μηχανικού, μεταπτυχιακό στην εφαρμοσμένη φυσική και διδακτορικό στα εφαρμοσμένα μαθηματικά. Είναι μεταδιδακτορικός ερευνητής στην Ακαδημία Αθηνών και διδάσκει το μεταπτυχιακο μάθημα «Συστήματα Αυτόματου Ελέγχου» στο τμήμα Φυσικής του ΕΚΠΑ.

 

Curriculum Vitae

Dimitrios Razis 

Personal Data

Name:                                     Dimitrios Razis

Date of Birth:                           27-07-1983

Telephone:                              +306979244499

e-mail:                                    razisdim@gmail.com

Education

PhD:      Department of Mathematics, University of Patras. Thesis Advisor: Prof. Dr. J.P. van derWeele. Thesis Title: “Nonlinear Waves in Granular Flow” (2020). (Cum Laude).

MSc:      Applied Physics/Physics of Fluids track, Faculty of Science & Technology, University ofTwente, The Netherlands (2010). University of Twente Scholarship. (Cum Laude).

MEng: Department of Mechanical Engineering and Aeronautics, Polytechnic School, University ofPatras, (2007). In the Hellenic Entrance Exams, I ranked first on a nationwide scale.

Publications

  1. Kanellopoulos, D. Razis, and K. van der Weele, “Pairwise balancing of forces in traveling granular waves”, under revision at Phys. D: Nonlinear Phenom. (2024).
  2. van der Weele, D. Razis, and G. Kanellopoulos, “Traveling waves in flowing sand: the dynamical systems approach”, Chaos, Fractals and Complexity – Springer Nature, 199-212 (2023).
  3. Razis, G. Kanellopoulos, and K. van der Weele, “Roll waves as relaxation oscillations”, Phys. Fluids 35, 063333 (2023).
  1. Kanellopoulos, D. Razis and K. van der Weele, “On the shape and size of granular roll waves”, J. Fluid Mech. 950, A27 – 1-28 (2022).
  1. Razis, G. Kanellopoulos, and K. van der Weele, “Continuous hydraulic jumps in laminar channel flow”, J. Fluid Mech. 915, A8 – 1-22 (2021).
  1. Kanellopoulos, D. Razis, and K. van der Weele, “On the structure of granular jumps: thedynamical systems approach”, J. Fluid Mech. 912, A54 – 1-19 (2021).
  2. Kanellopoulos, D. Razis, and K. van der Weele, “The Persian Immortals: A classical case of self-organization”, Am. J. Phys. 88, 263-268 (2020). Cover Issue of Am. J. Phys.
  3. Razis, G. Kanellopoulos, and K. van der Weele, “A Dynamical Systems view of granular flow: from monoclinal flood waves to roll waves”, J. Fluid Mech. 869, 143-181 (2019).
  4. Razis, G. Kanellopoulos, and K. van der Weele, “Τhe granular monoclinal wave”, J. Fluid Mech. 843, 810-846 (2018).
  5. Razis, A.N. Edwards, J.M.N.T. Gray, and K. van der Weele, “Arrested coarsening of granular roll waves”, Phys. Fluids 26, 123305 (2014). Research Highlight of 2014.

Research Interests

Fluid Mechanics, Waves in Fluids, Open Channel Flow, Hydraulic Jumps, Aerodynamics, Nonlinear Dynamical Systems, Control Systems, Mathematical Modelling.

Presentations in Conferences and Seminars

►  On subjects related principal research field, Fluid Mechanics:
  1. “A Dynamical Systems View of the Hydraulic Jump”, XLV Dynamics Days Europe, Thessaloniki, Greece, 23-27 June 2025.
  2. “Continuous Hydraulic Jumps in Open Channel Flow”, 3rd Young Researchers Conference in Areas of Mathematical Sciences, University of Ioannina, Greece, 24-25 May 2024.
  3. “Competing Forces in Nonlinear Waves”, SAM: Symposium on Acoustic Metamaterials #4, Aegina, Greece, 15-18 May 2024.
  4. “A Dynamical Systems View of Nonlinear Waves in Open Channel Flow”, 29th Summer School – Conference in Dynamical Systems & Complexity, National Centre for Scientific Research “Demokritos”, Athens, Greece, 17-26 July 2023.
  5. “Continuous hydraulic jumps in laminar channel flow”, 14th European Fluid Mechanics Conference (EFMC14), Athens, Greece, 13-16 September 2022.
  6. “Continuous hydraulic jumps in laminar channel flow”, 28th Summer School – Conference in Dynamical Systems & Complexity, Chania, Greece, 18-26 July 2022.
  7. “On the structure of granular jumps: The Dynamical Systems approach”, 27th Summer School – Conference in Dynamical Systems & Complexity, National Centre for Scientific Research “Demokritos”, Athens, Greece, 19-24 July 2021.
  8. “Monoclinal waves in granular flow: The interplay between nonlinearity and diffusion”, 6th Dynamics Days Central Asia (online conference), Nur Sultan, Kazakhstan, 2-5 June 2020.
  9. “Nonlinear granular waves: The Dynamical Systems approach”, 26th Summer School –Conference in Dynamical Systems & Complexity, NTUA, Athens, Greece, 14-20 July 2019.
  1. “The granular monoclinal wave”, 2nd Conference of Young Researchers in the Branches of Mathematical Science, University of Ioannina, Greece, 1-2 June 2018.
  2. “Arrested coarsening of granular roll waves”, 7th International Meeting of the Hellenic Society of Rheology (HSR2014), Heraklion, Greece, 7-10 July 2014.
  3. “Arrested coarsening of granular roll waves”, 4th D. Summer School – Conference on “Mathematical Modeling of Complex Systems”, Athens, Greece, 14-25 July 2014.
  1. “The Faraday instability on vibrated drops”, Université Paris-Diderot (Paris VII), Laboratoire

Matière et Systèmes Complexes, Paris, 26 July 2010.

  1. “Levitation by lubrication: The shapes of drops levitated on an air cushion”, University of Twente, Physics of Fluids group, Enschede, the Netherlands, 10 May 2010.
►  On topics of my broader scientific interests:
  1. “Perturbing the Celestial Orbits: The Lens Cap that Accidentally Became a Satellite of the Earth”, Astronomical Society of Patras,11-12-24.
  2. “Greeks versus Trojans: The Lagrangian points of Jupiter”, Astronomical Society of Patras, 12-02-20.
  3. “Feynman’s lost lecture: On the motion of planets”, Astronomical Society of Patras, 06-12-17
  1. “Evolutionary Mathematics”, Seminar on Nonlinear Systems, Department of Mathematics, University of Patras, Greece, 19-11-15.
  2. “The two-dimensional throw with air resistance: New insights in a classic problem”, Seminar on Nonlinear Systems, Department of Mathematics, University of Patras, Greece, 24-01-13.
  3. “Levitation by lubrication: The shapes of drops levitated on an air cushion”, Seminar on Nonlinear Systems, Department of Mathematics, University of Patras, Greece, 08-03-12.

Supervision of Theses

From 2021 I am appointed by the Department of Physics of the National and Kapodistrian University of Athens (NKUA) to teach the courses “Systems and Control” (undergraduate, 2021- 2022), and “Control Systems II” (postgraduate, 2022-now). During this period, I have supervised 4 undergraduate Theses:

  • “Nonlinear Waves in Open-Channel Flow: The Dynamical Systems Perspective” ― Theodoros

Fragkos, Department of Physics, NKUA, Greece.

  • “Hysteresis and Catastrophe of the Duffing Oscillator” ― Christos Giannopoulos, Department of Physics, NKUA, Greece (in progress).
  • “The Dynamic Stabilization of the Inverted Pendulum via Open and Closed Loop Systems” ―

Alexandros Uijterwaal, Department of Physics, NKUA, Greece.

  • “The Logistic Map and the Transition to Chaos” ― Panagiotis Anagnostopoulos, Department of Physics, NKUA, Greece.
  • “The Van der Pol Oscillator and Relaxation Oscillations” ― Nikolaos Papadopoulos, Department of Physics, NKUA, Greece.

Teaching and Professional Experience

From 2021 up to now I am constantly appointed as a lecturer of a wide variety of courses in several universities of Greece. More specifically in the last 6 academic semesters I have lectured 10 courses ―both in undergraduate and postgraduate level― in 3 different universities of Greece:

  • 2024─2025, autumn semester: Lecturer of the graduate course “Control Systems II”, Department of Physics, NKUA.
  • 2024─2025, autumn semester: Lecturer of the undergraduate course “Control Systems & Industrial Automations”, Faculty of Mechanical Engineering ― School of Pedagogical and Technological Education, Athens, Greece.
  • 2023─2024, spring semester: Lecturer of the undergraduate course “Automotive Technology (laboratory)”, Faculty of Mechanical Engineering ― School of Pedagogical and Technological Education, Athens, Greece.
  • 2023─2024, autumn semester: Lecturer of the undergraduate course “Fluid Mechanics I (laboratory)”, Faculty of Mechanical Engineering ― School of Pedagogical and Technological Education, Athens, Greece.
  • 2023─2024, autumn semester: Lecturer of the undergraduate course “Control Systems & Industrial Automations”, Faculty of Mechanical Engineering ― School of Pedagogical and Technological Education, Athens, Greece.
  • 2023─2024, autumn semester: Lecturer of the graduate course “Control Systems II”, Department of Physics, NKUA.
  • 2022─2023, spring semester: Lecturer of the undergraduate course “Fluid Mechanics”, Department of Civil Engineering, School of Engineering, Volos, University of Thessaly. (MIS 5181014).
  • 2022─2023, spring semester: Lecturer of the undergraduate course “Environmental Fluid Mechanics”, Department of Civil Engineering, School of Engineering, Volos, University of Thessaly. (MIS 5181014).
  • 2022─2023, autumn semester: Lecturer of the undergraduate course “Unsteady Flows”, Department of Civil Engineering, School of Engineering, Volos, University of Thessaly. (MIS 5181014).
  • 2022─2023, autumn semester: Lecturer of the graduate course “Control Systems II”, Department of Physics, NKUA.
  • 2021─2022, spring semester: Lecturer of the graduate course “Systems and Control”, Department of Physics,NKUA (MIS 5131398).
  • 2020─2021, spring semester: Lecturer of the undergraduate course “Systems and Control”, Department of Physics, NKUA (8th semester). (MIS 5064859).
  • 2015─2020: Tutor in Fluid Institute of Higher Education for University Students «Prosimo», Patras, Greece.
  • 2014─2019: As a PhD candidate I was Teaching Assistant for “Vector Calculus – Real Analysis IV” (Compulsory Course, 4th semester) at the Department of Mathematics of the University of Patras. Syllabus: Vector Calculus, Line & Surface Integrals of Scalar and Vector Fields, The Fundamental Theorems of Vector Calculus (Green, Stokes, Gauss), Applications to the Natural
  • 2010: Erasmus Placement, Université Paris-Diderot (Paris VII), Laboratoire Matière et Systèmes Complexes. Project Title: “The Faraday instability on vibrated drops”, Supervisor: Prof. Dr. Adrian Daerr.
  • 2004: Internship, Hellenic Defense Systems, Department of Research & Development. 

Research Programs and Scholarships

May 2025─Now: Postdoctoral Researcher at the Mathematics Research Center (MaRC) of the Academy of Athens. Research Program “The unified transform method for solving partial differential equations”, Sectoral Development Program (SDP 5223471) of the Ministry of Education, Religious Affairs and Sports, through the National Development Program (NDP) 2021-25, Grant No. 200/1029. Principal Investigator: Dr. K. Kalimeris.

2020─2022: Postdoctoral Researcher in the Research Program “Dynamical Systems Analysis of Nonlinear Waves in Open Channel Flow”, Department of Mathematics, University of Patras, Greece. Principal Investigator: Prof. Dr. Ko van der Weele.

2012─2015: Research Program “COVISCO,” co-financed by the European Union (European Social Fund) and Greek national funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework-Research Funding Program THALES: Investing in knowledge society through the European Social Fund (Grant No. MIS 380238).

Part of my PhD Thesis was founded by the scholarship of “COVISCO” issued by the Institute of Electronic Structure and Laser ― Foundation of Research and Technology (IESL―FORTH)

2008─2010: Master Student Scholarship awarded by the University of Twente in the context of my Master Studies in Applied Physics/Physics of Fluids.

Dissemination of my work in the Media

https://www.youtube.com/watch?v=k081SPmserg (in Greek) “Nonlinear Waves in Open Channel Flow: The Dynamical Systems Approach”, in the context of the Series of Scientific Lectures of the Department of Civil Engineering, University of Thessaly, Volos, Greece, 30-11-22.