Pressure drop for foam flow through pipes

Experiments for foam model development and validation.

“…The slip velocity profile consists of shear profiles near the perpendicular walls and plug flow profiles along the center. The shape of the slip velocity profile is consistent with non-curing foam systems [Calvert 1990, Calvert and Nezhati 1986, Kraynik 1988. The decrease of the average slip velocity is the result of a decreased availability of the blowing agent and the increase in viscosity due to polymerization and increasing gas volume fraction.…”

Experimental investigation of a wet foam flow through a horizontal sudden expansion

“…and ensuring the control of operations (energy loss, heat and mass transfers), is of a capital interest. Whilst the foam flow in ducts has been the subject of (at x = À765 mm) P 1 (Pa) static pressure measured by the first pressure tap upstream far from the singularity P 2 (Pa) static pressure measured by the last pressure tap downstream far from the singularity PIV particle image velocimetry DP S (Pa) singular pressure rise DP BC (Pa) singular pressure rise due to the kinetic effects of the singularity (Borda-Carnot formula) DP friction (Pa) singular pressure drop due to the friction in the vicinity of the singularity Q G (m 3 Exponent -temporal average many studies [2][3][4][5][6][7][8][9][10][11], foam flow through singularities (and in particular, through a sudden expansion) remains not studied. At the present time, there is almost no information on the reorganization of a such foam flow downstream of the singularities, in order to better understand the accidental degradation of energy caused by these later, which leads to important changes in the foam structure.…”

Etude des mousses de décontamination en écoulement : méthodes de caractérisation

“…La reproductibilité des mesures est meilleure que celle donnée par Cal vert et al [10]. En effet, la dispersion des mesures expérimentales est d'environ 5 % au lieu de 20 %.…”