Contact pair correlation functions and equation of state for additive harddisk fluid mixtures

The contact pair correlation functions and the equation of state for a bina ry mixture of additive hard disks is obtained using a procedure similar to that leading to the Boublik-Mansoori-Carnahan-Starling-Leland equation of s tate for mixtures of additive hard spheres. The results from the derived eq uations are tested against new Monte Carlo data obtained for several diamet er ratios and mole fractions. The overall agreement is excellent. The equat ion of state reproduces exactly the second virial coefficient of the mixtur e and the third with great accuracy. Predicted values of the fourth and fif th virial coefficients are also in very good agreement with numerical data. (C) 2001 American Institute of Physics.