TY - JOUR
T1 - Investigation of the Effect of Viscosity on Slug Flow in Airlift Tubular Membranes in Search of a Sludge Surrogate
AU - Ratkovich, Nicolas Rios
AU - Chan, C.C.V.
AU - Berube, P.R.
AU - Nopens, I.
PY - 2010
Y1 - 2010
N2 - The behaviour of three different liquid-gas slug flows (water, carboxymethyl cellulose and activated sludge) in a vertical tube was studied using a high speed camera (HSC). Experiments were performed using different flow rates and two tube diameters (6.3 and 9.9 mm). The observed difference in behaviour of the ascending gas slugs can be explained by the difference in viscosity of the fluids (Newtonian and non-Newtonian). Moreover, it was observed that the degree of coalescence of gas slugs is lower for non-Newtonian liquids and they behave like a succession of slugs without actually coalescing into a single larger gas slug. Finally, gas slug rising velocities were also extracted, but no subsequent difference in the rising velocities of the different fluids was found.
AB - The behaviour of three different liquid-gas slug flows (water, carboxymethyl cellulose and activated sludge) in a vertical tube was studied using a high speed camera (HSC). Experiments were performed using different flow rates and two tube diameters (6.3 and 9.9 mm). The observed difference in behaviour of the ascending gas slugs can be explained by the difference in viscosity of the fluids (Newtonian and non-Newtonian). Moreover, it was observed that the degree of coalescence of gas slugs is lower for non-Newtonian liquids and they behave like a succession of slugs without actually coalescing into a single larger gas slug. Finally, gas slug rising velocities were also extracted, but no subsequent difference in the rising velocities of the different fluids was found.
U2 - 10.2166/wst.2010.118
DO - 10.2166/wst.2010.118
M3 - Journal article
SN - 0273-1223
VL - 61
SP - 1801
EP - 1809
JO - Water Science and Technology
JF - Water Science and Technology
IS - 7
ER -