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Particle‐Wall Interaction in a Viscoelastic Fluid

In this work, particle‐wall interaction in viscoelastic fluids is experimentally studied. The effect of Stokes number, Weissenberg number and surface roughness on the rebound velocity of a colliding spherical particle on a wall is considered. Different steel spherical particles are released in viscoelastic solutions of different high‐molecular‐weight polymers in water with different concentration, and the coefficient of restitution is calculated for particle‐wall collision. The critical Stokes number at which no rebound occurs is studied for different Weissenberg number.