MODELING AND EXPERIMENTS OF CONDUCTIVITY MEASUREMENT OF GRANULAR MATERIALS USING CYLINDERS CONTAINING SAND AND HOT WIRE ON MAIN AXIS

• Main Author: Fika Lubis, Nuraina
• Format: Theses
• Language: Indonesia
• Subjects: Fisika
• Online Access: https://digilib.itb.ac.id/gdl/view/36596
• Institution: Institut Teknologi Bandung

A hot wire is placed at the center of the cylinder containing sand. The heat on the wire is generated by flowing current ???? on a wire that has resistance ????, length ???? and cross-sectional area ???? so that it can produce power????????. In each time unit ????????, some energy ???? is given to buckshot and sand which has thermal conductivity ???? and in the cylinder cavity. The radius of the cylinder cavity is ???? and the thickness of the cylinder shell is ????????. Then, the heat from the buckshot and sand is transferred by conduction to the cylinder shell, then radiated by it with temperature ???? to the temperature environment ????????. Through observation of changes in temperature of the cylinder shell, the conductivity of granular material in the form of buckshot and sand can be modeled. From the experiments that have been carried out, the highest temperature reached by the wire when propagating through the mixture of buckshot and sand is approximately 319 K in the composition of 100% buckshot. It was also proved that the variation of mixed sand + buckshot + sand did not affect the magnitude of the increase in temperature of the current wire between one variation and the other variations.