Author(s): L. Amara; R. F. Carvalho
Linked Author(s): Maria Rita L. M. F. Carvalho
Keywords: No Keywords
Abstract: Hydraulic manifold usually consists of one relatively large pipe, in which there are numerous junctions with small pipes, usually relatively closely spaced, all allowing flow from the main pipe. The flow in dividing manifolds is a spatially varied flow and it is traditional analyzed as steady flow with different considerations of the two opposing forces known as friction and momentum. This work shows current past studies of manifolds based on Bernoulli, continuity and momentum equations and describes different general mathematical model for computing flows in manifold systems considering energy losses in different ways, whether friction is or is not considered and whether junction losses are or are not considered. The nondimensional parameters affecting the flow distribution are identified, as well as comparison between models in different flow regimes: (1) equilibrium (2) momentum dominant (3) friction dominant and (4) momentumfriction reciprocity. For a special case, it presents an analytical solution and numerical simulations using 3D Finite volume methods, which are compared. Analytical solution is of great interest for most practical cases in hydraulic engineering. However, when kinetic energy is important, it may lead to some deviation. 3D numerical models results are fair.
Year: 2022