The impulsive motion of a liquid resulting from a particle collision

When two particles collide in a liquid, the impulsive acceleration due to t he rebound produces a pressure pulse that is transmitted through the fluid. Detailed measurements were made of the pressure pulse and the motion of th e particles by generating controlled collisions with an immersed dual pendu lum. The experiments were performed for a range of impact velocities, angle s of incidence, and distances between the wall and the pairs of particles. The radiated fluid pressure was measured using a high-frequency-response pr essure transducer, and the motion of the Particles was recorded using a hig h-speed digital camera. The magnitude of the impulse pressure was found to scale with the particle velocity, the particle diameter and the density of the fluid. Additionally, a model is proposed to predict the impulse held in the fluid based on the impulse pressure theory. The model agrees well with the experimental measurements.