To parametrize air-water interaction parameters, systems are constructed having a water/air slab in the middle with air/water above and below. These systems are initially constructed as a rectangular box with dimensions 30 × 30 × 60 𝑅 𝑐 3 (19.4 × 19.4 × 38.8 𝑛𝑚 3 ) with interfaces in the XY plane and a total of 162000 particles, consisting of equal number of W and B beads. After a short NPT equilibration at the ambient pressure 23.7, NVT simulations are performed for 4 million steps, with quantities averaged over the last 3 million steps. The DPD timesteps used is 0.01 𝜏, where 𝜏 is the DPD time unit. Simulations are performed at different DPD temperatures with three independent runs at each temperature. Different initial configurations for NVT runs are created by running NPT equilibration at different lengths varying from 80000 to 120000 steps.