Author(s): P. C. Yannopoulos; H. S. Bekri
Linked Author(s):
Keywords: Plumes; Multi-port diffusers; Virtual image source technique; Superposition
Abstract: The work reported herein improves the classical virtual image source technique to simulate the boundary effect on velocity and concentration fields, when plumes are issued by multi-port systems in flowing environments, i.e. water bodies or atmosphere. Following the superposition model proposed by Yannopoulos (1996), the classical simulation method, according to which the real source field of concentrations in a semi-infinite space is simply superimposed on the field of the conjugate image source to get the actual field, is herein modified. The proposed technique is mathematically consistent with the equations of tracer and kinetic energy of the mean flow. It is applied to simulate wastewater discharges from a line diffuser in a water current of greater density and the results are compared to both the classical procedure computations and experimental measurements available in the literature. The excellent agreement of the proposed method findings to the experimental results verifies the theoretical assumptions, which the method is based on, and indicates that this modification should be incorporated in Gaussian models implementing the virtual image source technique.
Year: 2003