Rational understanding of viscoelastic drop impact dynamics on porous surfaces considering rheological properties

Understanding of viscoelastic drop impact on porous solid surfaces emerges as the essential physics for broad industrial and biological systems. However, there have been few studies concerning post-drop transition considering rheological properties dynamics. Here, we report post-impact dynamics drops mesh using experimental theoretical analyses. Five concentrations highly viscous polymer solutions with shear-thinning characteristics exhibit different (viscosity, storage, loss moduli, etc.). These changes in features result four distinguishable two-dimensional surfaces. Viscoelastic that (storage modulus > modulus) resulted combined elastic solid-like motions fluid-like depending velocity anti-penetration effects (such capillary pressure yield stress). Meanwhile, decreases fluid monotonous viscosity-dominant behaviors. A pressure-balance equation was proposed to theoretically predict filament column penetration length drops. The results correlated experimentally measured values until necking occurred column. We believe this study can shed light future applications involve various mechanical behaviors non-Newtonian drops, such 3D printing, coating, bio-fluid treatments, polymeric solutions.