Abstract
The equation of state for an ideal gas is simple, which is \(P=nk_\textrm{B}T\). In the case of imperfect gases where mutual interactions among the constituents are important, pressure P can be expressed as the series expansion of density n with appropriate coefficients, known as virial coefficients \(B_m\). In this paper, we have obtained the first four virial coefficients for a model interaction potential \(\Phi (r)\) using multidimensional Monte-Carlo integration and importance sampling methods. Next, we perform molecular dynamics simulations with the same \(\Phi (r)\) for a many-particle system to obtain P as a function of T and n. We compare our numerical data with the virial equation of state.
Graphic Abstract
The plot of Mayer function f(r) as a function of radial distance r for \(\Theta (r)\) for different inverse temperature \(\beta \).
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Acknowledgements
SH acknowledges financial support from IISER Mohali through a Junior Research Fellowship. PD acknowledges financial support from SERB, India through a start-up research grant (SRG/2022/000105).
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PD proposed the problem and develop the program for molecular dynamics simulation. SH performed the all the analytical and numerical work with the help of PD. The paper was written by PD.
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Howlader, S., Das, P. Virial equation of state for a granular system. Eur. Phys. J. E 47, 20 (2024). https://doi.org/10.1140/epje/s10189-024-00412-z
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DOI: https://doi.org/10.1140/epje/s10189-024-00412-z