Experimental investigation of shock-induced breakup of single viscoelastic droplets

The present work experimentally studies the breakup of single viscoelastic droplets subject to shock-induced gas flow. Millimeter-sized droplets, made from aqueous solutions of carbonxymethylcellulose and polyacrylamideare, are examined. Both non-Newtonian liquids share similar shear viscosities while the latter shows a stronger elasticity. The droplets are ejected discretely into a shock tube inside which shock waves of varying strength are generated to achieve different Weber numbers. The droplet deformation is visualized by a focused shadowgraph system and recorded as continuous images with a high-speed camera. We will compare the breakup process between the two viscoelastic liquids as well as against the Newtonian counterpart, water. Then, the effect of the viscoelastic behavior on the breakup regimes and other breakup properties will be evaluated.     «

The present work experimentally studies the breakup of single viscoelastic droplets subject to shock-induced gas flow. Millimeter-sized droplets, made from aqueous solutions of carbonxymethylcellulose and polyacrylamideare, are examined. Both non-Newtonian liquids share similar shear viscosities while the latter shows a stronger elasticity. The droplets are ejected discretely into a shock tube inside which shock waves of varying strength are generated to achieve different Weber numbers. The drop...     »