“…Stochastic fluid flow models are useful instruments for evaluating numerous performance measures including the distribution and moments of the fluid level in the area of congestion control, communication networks, risk processes, and other related systems. Some significant works on fluid flow models and their applications can be found in Anick et al [1], Elwalid and Mitra [2], Kapoor and Dharmaraja [3], Mitra [4], Latouche and Taylor [5], Bekker and Mandjes [6], Stern and Elwalid [7], Knessl and Morrison [8], El-Baz et al [9], and related references therein. The behavior of fluid queueing models examined by several researchers can be classified into two types; one is the stationary and another being the non-stationary.…”