Abstract
A recently proposed analytical equation of state (EOS) for the hard core Yukawa fluid is tested against results of Monte Carlo (MC) simulations. The Duh and Mier-y-Terán (DMT) equation of state is based on the mean-spherical approximation (MSA) and gives the free energy of the fluid for arbitrary ranges of the Yukawa interaction. The pressure EOS is compared with results of new NVT MC simulations for shorter ranges of the potential and with the solution of the MSA. In all cases, the DMT EOS reproduces very accurately the MSA results obtained via the energy route. For the longer Yukawa ranges, the DMT EOS agrees well with the MC results but systematic deviations, due to the MSA itself, are noticeable for shorter ranges.
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