Q1. What contributions have the authors mentioned in the paper "A new model for ejected particle velocity from erupting bubbles in 2-d fluidized beds" ?
A new model is proposed for obtaining the velocity profile of the particle ejected from the bubble dome in a freely bubbling 2-D fluidized bed. Its basis is the supposition that the initial velocity of the ejected particles, with a direction perpendicular to the dome contour, depends on bubble velocity and bubble growth velocity. Upon comparing these results with the proposed model, it was established that, excepting some isolated cases, the model properly predicts the magnitude and direction of the maximum particle ejection velocity and the velocity profile. These expressions, together with the proposed model, can be used to calculate the initial velocity of the ejected particles.