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In this paper we explore the validity of the Rosenfeld and the Dzugutovrelation for the Lennard-Jones (LJ) system, its repulsive counterpart, the WCAsystem and a network forming liquid, the NTW model. We find that for all thesystems both the relations are valid at high temperature regime with anuniversal exponent close to 0.8. Similar to that observed for the simpleliquids, the LJ and the WCA systems show a breakdown of the scaling laws at thelow temperature regime. However for the NTW model, which is a simple liquid,these scaling laws are valid even at lower temperature regime similar to thatfound for ionic melts. Thus we find that the NTW model has mixedcharacteristics of simple liquids and ionic melts. Our study further reveals aquantitative relationship between the Rosenfeld and the Arrhenius relations.For strong liquids, the validity of the Rosenfeld relation in the lowtemperature regime is connected to it following the Arrhenius behaviour in thatregime. Finally we explore the role of pair entropy and residual multiparticleentropy in the dynamics as a function of fragility of the systems.

Validity of the Rosenfeld relationship: A comparative study of the network forming NTW model and other simple liquids