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Anette E. Hosoi. Hoberg, Theresa B. (Theresa Blinn) Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering 2013-10-24T17:34:07Z 2013-10-24T17:34:07Z 2013 2013 http://hdl.handle.net/1721.1/81604 858868853 Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013. Cataloged from PDF version of thesis. Includes bibliographical references (p. 73-75). Interactions between capillary and elastic effects are relevant to a variety of applications, from micro- and nano-scale manufacturing to biological systems. In this thesis, we investigate capillary flows in extremely flexible, millimeter-scale cylindrical elastic tubes. We demonstrate that surface tension can cause sufficiently flexible tubes to collapse and coalesce spontaneously through non-axisymmetric buckling, and develop criteria for the initial deformation and complete collapse of a circular tube under capillary pressure. Experimental results are presented for capillary rise and evaporation of a liquid in a flexible tube. Several regimes are seen for the equilibrium state of a flexible tube under capillary pressure, and deformations of the tube walls are measured in different regimes and compared with a shell theory model. Good agreement is found between experiments and theory overall. Analysis and experimental results show that despite the complex and non-axisymmetric deformed shapes of cylindrical structures, the elastocapillary length used in previous literature for flat plates and sheets can also apply for flexible tubes, if the tube radius is used as the characteristic length scale. by Theresa B. Hoberg. S.M. 75 p. eng Massachusetts Institute of Technology 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 Mechanical Engineering. Capillary flows in flexible structures Thesis application/pdf Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="6aa07eb2-aeab-440d-97b1-5bc13aed78eb"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Capillary flows in flexible structures</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2013</PublicationDate> <Authors> <Author> <DisplayName>Hoberg, Theresa B. (Theresa Blinn)</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Mechanical Engineering.</Keyword> <Abstract>Interactions between capillary and elastic effects are relevant to a variety of applications, from micro- and nano-scale manufacturing to biological systems. In this thesis, we investigate capillary flows in extremely flexible, millimeter-scale cylindrical elastic tubes. We demonstrate that surface tension can cause sufficiently flexible tubes to collapse and coalesce spontaneously through non-axisymmetric buckling, and develop criteria for the initial deformation and complete collapse of a circular tube under capillary pressure. Experimental results are presented for capillary rise and evaporation of a liquid in a flexible tube. Several regimes are seen for the equilibrium state of a flexible tube under capillary pressure, and deformations of the tube walls are measured in different regimes and compared with a shell theory model. Good agreement is found between experiments and theory overall. Analysis and experimental results show that despite the complex and non-axisymmetric deformed shapes of cylindrical structures, the elastocapillary length used in previous literature for flat plates and sheets can also apply for flexible tubes, if the tube radius is used as the characteristic length scale.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>