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A new and accurate equation of state for hard-body fluids is proposed. For linear molecules, the equation only requires the second virial coefficient, which is known exactly for convex as well as for many non-convex hard-body fluids, to provide very good agreement with simulations even for quite elongated molecules. For non-linear molecules, some of the higher order virial coefficients might be needed, for which reasonable approximations would probably be sufficient to obtain satisfactory results.
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J. R. Solana (2014) studied this question.
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