Sudden Expansion of Gas-solid Two Phase flow

Abstract

Momentum transfer from particles to gas in a decelerated flow of suspensions is confirmed experimentally in a sudden expansion of pipes of different expansion ratios by using different particles, when the flux Richardson number exceeds 0.0015. Mean axial velocity profiles of air in a suspension are measured by a thermistor anemometer in a larger pipe in case of the expansion ratio 0.523, and it is shown that an approximately uniform profile near the maximum pressure point disappears when the flux Richardson number is 2.07×l0-3.