In the DCVMD setup, the time interval τ , which dictates the rate of exchange between the control volumes and the bulk reservoir, is a critical parameter that can potentially influence the results. In previous non-equilibrium MD studies, the value of τ ranges between 10 to 200 ps. To test and establish a sensible choice of τ value in this setup, we perform several preliminary simulations using different values of τ , between 50 to 100 ps, and, interestingly, observed little difference in the results. For the actual production runs we adopt a τ value of 50 ps.