Development of vibration shear tube method for powder flowability evaluation

► A new method for evaluating powder flowability has been developed. ► To make particles flow in this system, a shear field was generated by vibration. ► The vibration amplitude was increased during the measurement. ► The amount of powder used for the measurement was about 10-40 g. ► The measurement time was 100-400 s and the flowability profile was evaluated.