Dilution in a dense bottom jet in cross currents

A 3-dimensional numerical model describing the dilution in the near field a round dense vertical jets in a cross flow is formulated and validated again st laboratory experiments. The validation shows that the model reproduces t he flow pattern well, though the dilution is underestimated by 20%. The mod el is applied to a case study where the dilution from two vertical jets at an angle in shallow water is described. It is demonstrated that a 20% incre ase in dilution is possible. It is concluded that the model may become a va luable tool in diffuser design. (C) 1998 IAWQ Published by Elsevier Science Ltd. All rights reserved.