EFFECT EXPERIMENTS WITH BRAZIL NUT BALL AND DETERMINATION OF INTRUDER IN NUMERICAL VISCOSITY GRANULAR

• Main Author: ROSYIDA (NIM : 10207088); Pembimbing : Dr. Sparisoma Viridi, RAHMAWATI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16909
• Institution: Institut Teknologi Bandung

Granular material in certain condition which vibrated vertically will show of the Brazil-nut effect. It is mean that the larger grain would split up and the smaller grains will collect in the base. Single ball, double ball coincide, and double ball which is connected by a stick are used as intruders in this experiment. <br /> <br /> <br /> <br /> <br /> <br /> <br /> The research carried out by observing the rising time of the intruder came from the bottom of the container to appear on the surface of granular for the different <br /> <br /> <br /> <br /> <br /> <br /> <br /> frequencies and voltages. The experimental results show the rising time most rapidly occurring at frequency 21 Hz for a constant voltage 12.6 volts on all three <br /> <br /> <br /> <br /> <br /> <br /> <br /> forms of intruder. A single ball and double ball coincide indicates the trend of rising time more similar to each other compared with double ball away. At a constant frequency of 19 Hz was found that the greater input voltage the faster rising time. Based on numerical methods we know that the value of granular viscosity depends on frequency, input voltage, and geometry intruder. <br />