The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/32806 |
| _version_ | 1826190930834620416 |
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| author | Hwang, Pey-Hua B. (Pey-Hua Betty), 1982- |
| author2 | Anette E. Hosoi. |
| author_facet | Anette E. Hosoi. Hwang, Pey-Hua B. (Pey-Hua Betty), 1982- |
| author_sort | Hwang, Pey-Hua B. (Pey-Hua Betty), 1982- |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004. |
| first_indexed | 2024-09-23T08:47:50Z |
| format | Thesis |
| id | mit-1721.1/32806 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T08:47:50Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/328062019-04-10T07:36:54Z The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films Hwang, Pey-Hua B. (Pey-Hua Betty), 1982- Anette E. Hosoi. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004. Includes bibliographical references (p. 18-20). By imitating nature, man finds ways to expand his capacities. To achieve this aim, he often takes natures designs, simplifies them to their most basic principles and then works in a retrograde fashion to add back the complexity originally stripped away to make the first discoveries. This thesis is based on previous work done on modeling snail movement on a macroscopic scale using a motor driven wave propagation machine. This project scaled down the mechanism to a size more commonly found in nature. This downscaling required a new method for producing waves. Peristaltic pumping achieved through the use of soft-lithography and pneumatics was the method chosen. This combination of ideas proved challenging for several reasons. First, the pumping method had previously only been used with one channel per pneumatic input, whereas the snail required each input to feed a multitude of branching channels creating a more complicated fluid dynamics problem. Second, the snail waves were downscaled from a continuous sinusoid to the three phase stepping mechanism of the peristaltic pump. Each three-phase cycle was considered equivalent to one wavelength. Thus, after creating a design that could move, the ratio between the traveling wavelength speed and subsequent net movement were compared to the aforementioned mathematical model. The model's ratio was 0.56 net/wave velocity. The actual ratio was .05 net/wave velocity. The difference by an order of magnitude could be attributed to the discontinuity of the pumping mechanism as opposed to the continuous nature of an actual traveling wave. by Pey-Hua B. Hwang. S.B. 2006-05-15T20:31:32Z 2006-05-15T20:31:32Z 2004 2004 Thesis http://hdl.handle.net/1721.1/32806 57587864 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 26 p. 1851401 bytes 1849876 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Hwang, Pey-Hua B. (Pey-Hua Betty), 1982- The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films |
| title | The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films |
| title_full | The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films |
| title_fullStr | The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films |
| title_full_unstemmed | The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films |
| title_short | The use of soft lithography to reproduce snail-like movement by creating pressure gradients in thin films |
| title_sort | use of soft lithography to reproduce snail like movement by creating pressure gradients in thin films |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/32806 |
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