Influence de la viscoélasticité de la paroi sur les phénomènes classiques de coup de bélier

Fluid–structure interaction with pipe-wall viscoelasticity during water hammer

“…He stated that ABS is not significantly viscoelastic, and therefore not the main mechanism for dispersion (degradation of wave front). A thorough theoretical analysis and illustration of the degradation of wave fronts, as caused by FSI and viscoelasticity, was given by Bahrar et al (1998). Van der Weijde (1985) did experiments on a 50 mm diameter PVC pipeline containing a 24 m long U-shaped test section.…”

Numerical Analysis of Transient Flow in Polyethylene Pipe

“…Given these assumptions, the averaged equations of the flow in a cross section of pipe can be written in traditionally a one-dimensional formulation, reflecting the relations of conservation of mass and momentum averaged over a section of a cross section, as hyperbolic system that is suitable for characteristic methods [8][9][10][11][12][13][14][15][16] + , and the Eq. ( 3) above became…”

Modeling of transient flow in plastic pipes

“…In the field of plastic materials, the classic study of the phenomena of waterhammer in pipes, is usually conducted in one-dimensional flow and the conduit is supposed to be deformed instantly as if it consists of a stacking of rings without mass. Bahrar et al [3] have recently developed a method for calculating two-dimensional flow from the shell theory of Timoshenko for the dynamic behavior of the pipe wall. The pioneering studies in this area appear to be those of Tison in 1958 [10], who had noticed the influence of viscoelasticity on the transient flow behavior associated with the valve opening.…”