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FACULTY OF PHYSICS

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2024-11-22 2:16

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Conference: Bucharest University Faculty of Physics 2015 Meeting

Section: Nuclear and Elementary Particles Physics II

Title:

Hydrodynamic flow and phase transitions in relativistic nuclear collisions

Authors:

Alexandru JIPA(1), Calin BESLIU(1), Oana RISTEA(1), Catalin RISTEA(2,1), Marius CALIN(1), Ionel LAZANU(1), Tiberiu ESANU (3,1), Daniel FELEA(2,1), Ioan Valeriu GROSSU(1), Emil STAN(2), Cristian BORDEIANU(4,1), Valerica BABAN(5), Danut ARGINTARU(5), Nicolae George TUTURAS(1)

Affiliation:

(1) Atomic and Nuclear Physics Chair, Department of Structure of Matter, Earth and Atmosphere Physics, Astrophysics, Faculty of Physics, University of Bucharest, ROMANIA

(2) Institute of Space Science Bucharest-Magurele

(3) Institute of Physics and Nuclear Engineering "Horia Hulubei" Bucharest-Magurele

(4) Military National College "Stefan cel Mare" Campulung Moldovenesc

(5) University of Civil Marine Cosntantza

E-mail

jipa@brahms.fizica.unibuc.ro

Keywords:

relativistic nuclear collisions, collective behaviour, hydrodynamics, flow, phase transitions, Reynolds number

Abstract:

The dynamics of the relativistic and ultrarelativistic nuclear collisions is extremely complex. Therefore, many mechanisms were proposed during the time. Ones of the most adequate mechanisms seem to be those based on hydrodynamics concepts. The hydrodynamic flow of the extremely dense and hot nuclear matter from the participant region, with the possible influences of the spectator regions, can be correlated with the possible phase transitions in nuclear matter. The present work present different ways for description of the hydrodynamic behaviour of the nuclear matter, with possible jumps in dependencies of some interesting physical quantities at the critical point for a specific phase transition in nuclear matter. These include aspects from standard hydrodynamic equations up to the introduction an equivalent Reynold number for nuclear matter. It is important to stress here that the behaviour of such quantity reflects well the observed experimental tendency to a perfect fluid behaviour in the phase of the quark-gluon plasma of the nuclear matter formed in relativistic and ultrarelativistic nuclear collisions.

Acknowledgement:

This work was been performed in the frame of a few grants awarded from national founding agencies, namely: UEFISCDI (IDEI-34/2011), IFA (F09/2014), ROSA (1/2013). Many thanks all for support.