BRAZIL NUT EFFECT
In this final assignment will be assessed a phenomenon that occurs in a number of different grain sizes. When a mixture of grains of different sizes is given energy from the outside, in the form of vibration, it will separate itself. As result of the separation, the large grains will be on the surfa...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/15996 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | In this final assignment will be assessed a phenomenon that occurs in a number of different grain sizes. When a mixture of grains of different sizes is given energy from the outside, in the form of vibration, it will separate itself. As result of the separation, the large grains will be on the surface, while the smaller grains would be under. This phenomenon is also called brazil nut effect. From this phenomenon, the author wants to make a simple model of the <br />
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brazil nut effect and look for the shape and size of the grains are most effective in the process of brazil nut effect and also see the influence of parameters that play a role in the process. The basic principle used in the modeling is Newton's Second Law; the resultant force acting <br />
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on the system would be worth the same as the object times the acceleration experienced. Some forces that the author concerned are the drag force, the force of gravity and the <br />
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Archimedes force. To obtain the necessary data, the author carried out a series of experiments with various grain sizes and frequencies. The result obtained from these experiments that the geometry of a triangular prism with a base width of 3 centimeter which placed upside down is <br />
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an effective form for the brazil nut effect process. It could be say to be effective because the prism needs only a short amount of time to reach the surface of the system, and the data obtained from the experiment is quite stable. The data is used as a standard in the mathematical modeling of the brazil nut effect. From the model that has been set up before, the author do some simulations of the parameters, they are the density of intruder, the density <br />
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of granular, the drag coefficient of objects, and the size of the intruder. From these simulations can be concluded that the density of intruder and granular was highly influential in the process of brazil nut effect, while the size of the intruder does not affect the time of that <br />
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phenomenon. |
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