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We study the elliptic flow coefficient v_2(eta,b) in Au+Au collisions at sqrt(s)=200 A GeV as a function of pseudorapidity eta and impact parameter b. Using a hybrid approach which combines early ideal fluid dynamical evolution with late…

Nuclear Theory · Physics 2008-11-26 Tetsufumi Hirano , Ulrich W. Heinz , Dmitri Kharzeev , Roy Lacey , Yasushi Nara

We investigate fluid-to-particle conversion using the usual Cooper-Frye approach but with more general local equilibrium distributions than the Boltzmann or Bose/Fermi distributions typically used. Even though we study ideal fluids (i.e.,…

Nuclear Theory · Physics 2019-07-01 Adam Takacs , Denes Molnar

We compute the time evolution of elliptic flow in non-central relativistic heavy-ion collisions, using a (2+1)-dimensional code with longitudinal boost-invariance to simulate viscous fluid dynamics in the causal Israel-Stewart formulation.…

Nuclear Theory · Physics 2008-11-26 Huichao Song , Ulrich W. Heinz

The detailed analysis of excitation function of elliptical flow by taking into account the nature of equation of state, nucleon-nucleon cross sections as well as momentum dependent interactions is performed within Quantum Molecular Dynamics…

Nuclear Theory · Physics 2011-12-30 Sanjeev Kumar , Rajeev Chugh

To reduce the effect of the fluctuations of initial geometrical shape, elliptic flow are studied at fixed centrality in Au+Au collision at $\sqrt{s_{\rm NN}}$=200GeV. It is observed with the participant increasing, elliptic flow has an…

Nuclear Theory · Physics 2012-08-31 Wang Meijuan , Chen Gang , Wu Yuanfang

Within a covariant parton cascade, we discuss the impact of both finite shear viscosity $\eta$ and freeze-out dynamics on the elliptic flow generated at RHIC. We find that the enhancement of $\eta/s$ in the cross-over region of the QGP…

Nuclear Theory · Physics 2010-03-04 V. Greco , M. Colonna , M. Di Toro , G. Ferini

By considering three different Nucleon-Nucleon (NN) elastic differential cross sections: the Cugnon \emph{et al.} parameterized differential cross section [Nucl. Instrum. Methods Phys. Res., Sect. \textbf{B111}, 215 (1996)], and the…

Nuclear Theory · Physics 2016-08-24 Yongjia Wang , Chenchen Guo , Qingfeng Li , Zhuxia Li , Jun Su , Hongfei Zhang

Anisotropic flow coefficients and their fluctuations are investigated for Au+Au collisions at center of mass energy $\sqrt{s_{NN}}$ = 200 GeV by using a multi-phase transport model with string melting scenario. Experimental results of…

Nuclear Theory · Physics 2015-06-19 L. Ma , G. L. Ma , Y. G. Ma

We present measurement of elliptic flow, $v_2$, for charged and identified particles at midrapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV. We compare the inclusive charged hadron $v_2$ to those from transport model…

Nuclear Experiment · Physics 2019-08-13 Shusu Shi

The bending of flow of identified particles from the relativistic heavy-ion collision is investigated using the iEBE-VISHNU framework. The Maxwell's equations are applied to compute the incremental drift velocity and the change in the…

Nuclear Theory · Physics 2021-07-07 Tewodros Gezhagn , A. K. Chaubey

Arterial deformations arise in blood flow when surrounding tissue invades the space available for a blood vessel to maintain its circular cross section, the most immediate effects being a reduction in blood flow and redistribution of shear…

Tissues and Organs · Quantitative Biology 2023-04-05 Chris Brimacombe , Robert M. Corless , Mair Zamir

We present a new direct simulation Monte-Carlo method for solving the relativistic Boltzmann equation. We solve numerically the 2-dimensional Boltzmann equation using this new algorithm. We find that elliptic flow from this transport…

Nuclear Theory · Physics 2008-11-26 Clement Gombeaud , Jean-Yves Ollitrault

The dynamics of fluctuating electric field structures in the edge of the TJ-II stellarator, that display zonal flow-like traits, is studied. These structures have been shown to be global and affect particle transport dynamically [J.A.…

We employed the new issue of a parton and hadron cascade model PACIAE 2.1 to systematically investigate the charged particle elliptic flow parameter $v_2$ in the relativistic nuclear collisions at RHIC and LHC energies. With randomly…

Nuclear Theory · Physics 2015-06-16 Ben-Hao Sa , Dai-Mei Zhou , Yu-Liang Yan , Yun Cheng , Bao-Guo Dong , Xu Cai

Within a parton cascade we investigate the dependence of anisotropies in momentum space, namely the elliptic flow $v_2=<cos(2\phi)>$ and the $v_4=<cos(4\phi)>$, on both the finite shear viscosity $\eta$ and the freeze-out (f.o.) dynamics at…

High Energy Physics - Phenomenology · Physics 2015-05-13 V. Greco , M. Colonna , M. Di Toro , G. Ferini

We extend our recent study of chiral magnetic effect in relativistic heavy ion collisions based on an anomalous transport model by including also the chiral vortical effect. We find that although vorticities in the chirally restored quark…

Nuclear Theory · Physics 2017-03-29 Yifeng Sun , Che Ming Ko

Within the ultrarelativistic quantum molecular dynamics (UrQMD) model, by reverse tracing nucleons that are finally emitted at mid-rapidity (|$y_0$| < 0.1) in the entire reaction process, the time evolution of elliptic flow ($v_2$) of these…

Nuclear Theory · Physics 2023-01-18 Bo Gao , Yongjia Wang , Zepeng Gao , Qingfeng Li

We perform viscous hydrodynamic calculations in 2+1 dimensions to investigate the influence of bulk viscosity on the viscous suppression of elliptic flow in non-central heavy-ion collisions at RHIC energies. Bulk and shear viscous effects…

Nuclear Theory · Physics 2010-04-06 Huichao Song , Ulrich W Heinz

We study effects of eccentricity fluctuations on the elliptic flow coefficient v_2 at mid-rapidity in both Au+Au and Cu+Cu collisions at sqrt{s_{NN}}=200 GeV by using a hybrid model that combines ideal hydrodynamics for space-time evolution…

Nuclear Theory · Physics 2009-11-18 Tetsufumi Hirano , Yasushi Nara

We calculate the elliptic flow parameter $v_2$ for Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV employing the parton cascade BAMPS (Boltzmann Approach of Multiparton Scatterings). Besides gluon interactions including the bremsstrahlung…

High Energy Physics - Phenomenology · Physics 2010-05-12 Zhe Xu , Carsten Greiner