Variable surface tension, due to the presence of surfactants or temperature gradient, occurs in a large variety of technologically important situations. It generally leads to tangential stresses along an interface between two fluids. The change in boundary conditions can have significant effect on the motion of buoyant bubbles and induce motion when buoyancy is small such as in microgravity.
Our work includes studies of the thermocapillary motion of bubbles and drops [1,2,3], the effect of insoluble surfactants on many bubbles [4,5], development of methods for soluble surfactants [6,7] and studies of the effect of soluble surfactant on motion of buoyant bubbles in channel flow [8].<\/p>\n\n\n\n
[1] S. Nas and G. Tryggvason. \u201cThermocapillary interaction of two bubbles or drops.\u201d Int\u2019l\u00a0J. Multiphase Flows 29 (2003), 1117\u20131135.<\/p>\n\n\n\n
[2] S. Nas, M. Muradoglu and G. Tryggvason. \u201cPattern Formation of Drops in\u00a0Thermocapillary Migration.\u201d International Journal of Heat and Mass Transfer 49 (2006)\u00a02265\u20132276.<\/p>\n\n\n\n
[3] Min Lu, Jiacai Lu, Ying Zhang and Gr\u00e9tar Tryggvason. \u201cNumerical study of\u00a0thermocapillary migration of bubble in a channel with an obstruction.\u201d Physics of Fluids.\u00a031 (2019), 062101.<\/p>\n\n\n\n
[4] Y.-J.\u00a0Jan and G. Tryggvason, “Computational Studies of Contaminated\u00a0Bubbles,”\u00a0Symp on Dynamics of Bubbles and Vortices Near a Free\u00a0Surface,” AMD Vol. 119 (Ed.\u00a0Sahin and Tryggvason), pp. 46-59, ASME (1991). \u00a0Y.-J. Jan\u2019s doctoral dissertation has\u00a0much more details that never made it into a journal paper.<\/p>\n\n\n\n
[5] J. Lu, M. Muradoglu and G. Tryggvason. \u201cEffect of Insoluble Surfactant on Turbulent\u00a0Bubbly Flows in Vertical Channels.\u201d International Journal of Multiphase Flow. 95 (2017),\u00a0135-143.<\/p>\n\n\n\n
[6] M. Muradoglu and G. Tryggvason. \u201cA front-tracking method for computation of\u00a0interfacial flows with soluble surfactants.\u201d Journal of Computational Physics 227 (2008),\u00a02238-2262.\u00a0<\/p>\n\n\n\n
[7] M. Muradoglu and G. Tryggvason. \u201cSimulations of Soluble Surfactants in 3D\u00a0Multiphase Flow.\u201d Journal of Computational Physics, 274 (2014), 737-757.<\/p>\n\n\n\n
[8] Zaheer Ahmed, Daulet Izbassarov, Gretar Tryggvason, Metin Muradoglu, and Outi\u00a0Tammisol. \u201cEffects of soluble surfactant on lateral migration of a bubble in a pressure\u00a0driven channel flow.\u201d International Journal of Multiphase Flow 126 (2020) 103251 (12\u00a0pages)\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
Variable surface tension, due to the presence of surfactants or temperature gradient, occurs in a large variety of technologically important situations. It generally leads to tangential stresses along an interface between two fluids. The change in boundary conditions can have significant effect on the motion of buoyant bubbles and induce motion when buoyancy is small […]<\/p>\n","protected":false},"author":16,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-full.php","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-396","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"atran23","author_link":"https:\/\/engineering.jhu.edu\/tryggvason\/author\/atran23\/"},"uagb_comment_info":0,"uagb_excerpt":"Variable surface tension, due to the presence of surfactants or temperature gradient, occurs in a large variety of technologically important situations. It generally leads to tangential stresses along an interface between two fluids. The change in boundary conditions can have significant effect on the motion of buoyant bubbles and induce motion when buoyancy is small…","_links":{"self":[{"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/pages\/396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/comments?post=396"}],"version-history":[{"count":6,"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/pages\/396\/revisions"}],"predecessor-version":[{"id":1054,"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/pages\/396\/revisions\/1054"}],"wp:attachment":[{"href":"https:\/\/engineering.jhu.edu\/tryggvason\/wp-json\/wp\/v2\/media?parent=396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}