Marangoni effect of a gas bubble migration

When a bubble is formed in a temperature field, the surface tension effect is significant on the moving of bubble. The phenomenon is important in the micro- or nano- scale manufacturing or in the space activities. The present project is to study the effect the transport driven by the temperature gra...

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Main Author: Muhamad Naim Aman.
Other Authors: School of Mechanical and Aerospace Engineering
Format: Final Year Project
Language:English
Published: 2011
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Online Access:http://hdl.handle.net/10356/46049
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-460492023-03-04T18:27:38Z Marangoni effect of a gas bubble migration Muhamad Naim Aman. School of Mechanical and Aerospace Engineering Fei Duan DRNTU::Engineering::Mechanical engineering::Fluid mechanics When a bubble is formed in a temperature field, the surface tension effect is significant on the moving of bubble. The phenomenon is important in the micro- or nano- scale manufacturing or in the space activities. The present project is to study the effect the transport driven by the temperature gradient which is called Marangoni effect. Five experiments were done in 3 different temperature fields, two in a uniform room temperature and the other three were done in a temperature gradient of ∆T 0.05 k/mm., ∆T 0.31k/mm and ∆T 1.33k/mm. The experiment is done in two test cell, one in a cell of dimension of 40 x 40 x 60 mm and the other is of dimension 10 x10 x 20 mm. A high speed camera is use to capture the bubble migration with a help of a camera light. The results show that the bubble in the room temperature has an almost constant velocity when it reached to top of the test cell and finish longer compare with the experiment done in the temperature gradient. When compare with the bubble that was formed in the temperature field, it was shown that the velocity of the bubble in the temperature gradient is higher due to Marangoni effects. This paper have proven by inducing a temperature gradient, it create a Marangoni effect which pulled the bubble towards the hotter region. For future experiment, should deal with two or more bubbles and their interaction. The parameter range of Re and Ma should be extended to understand the non linear effects. This experiment is important in the field of nano and micro scale manufacturing or crystal growing, as this micro or nano bubble may cause weakness in the material and crystal. Since the bubble is so small, we can depend on the buoyancy migration to remove the bubble and by applying temperature gradient it will help removed the bubble. Bachelor of Engineering (Mechanical Engineering) 2011-06-28T06:37:20Z 2011-06-28T06:37:20Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/46049 en Nanyang Technological University 109 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Fluid mechanics
spellingShingle DRNTU::Engineering::Mechanical engineering::Fluid mechanics
Muhamad Naim Aman.
Marangoni effect of a gas bubble migration
description When a bubble is formed in a temperature field, the surface tension effect is significant on the moving of bubble. The phenomenon is important in the micro- or nano- scale manufacturing or in the space activities. The present project is to study the effect the transport driven by the temperature gradient which is called Marangoni effect. Five experiments were done in 3 different temperature fields, two in a uniform room temperature and the other three were done in a temperature gradient of ∆T 0.05 k/mm., ∆T 0.31k/mm and ∆T 1.33k/mm. The experiment is done in two test cell, one in a cell of dimension of 40 x 40 x 60 mm and the other is of dimension 10 x10 x 20 mm. A high speed camera is use to capture the bubble migration with a help of a camera light. The results show that the bubble in the room temperature has an almost constant velocity when it reached to top of the test cell and finish longer compare with the experiment done in the temperature gradient. When compare with the bubble that was formed in the temperature field, it was shown that the velocity of the bubble in the temperature gradient is higher due to Marangoni effects. This paper have proven by inducing a temperature gradient, it create a Marangoni effect which pulled the bubble towards the hotter region. For future experiment, should deal with two or more bubbles and their interaction. The parameter range of Re and Ma should be extended to understand the non linear effects. This experiment is important in the field of nano and micro scale manufacturing or crystal growing, as this micro or nano bubble may cause weakness in the material and crystal. Since the bubble is so small, we can depend on the buoyancy migration to remove the bubble and by applying temperature gradient it will help removed the bubble.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Muhamad Naim Aman.
format Final Year Project
author Muhamad Naim Aman.
author_sort Muhamad Naim Aman.
title Marangoni effect of a gas bubble migration
title_short Marangoni effect of a gas bubble migration
title_full Marangoni effect of a gas bubble migration
title_fullStr Marangoni effect of a gas bubble migration
title_full_unstemmed Marangoni effect of a gas bubble migration
title_sort marangoni effect of a gas bubble migration
publishDate 2011
url http://hdl.handle.net/10356/46049
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