{"id":3984,"date":"2007-03-14T10:41:00","date_gmt":"2007-03-14T10:41:00","guid":{"rendered":"http:\/\/thales.mit.edu\/bush\/?p=3984"},"modified":"2021-04-15T01:22:27","modified_gmt":"2021-04-15T01:22:27","slug":"spontaneous-oscillations-of-a-floating-fluid-lens","status":"publish","type":"post","link":"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/","title":{"rendered":"Spontaneous oscillations of a floating fluid lens"},"content":{"rendered":"\n<div class=\"wp-block-cover has-subtle-background-color has-background-dim\"><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/heart-schem.jpg\"><img decoding=\"async\" src=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/heart-schem.jpg\" alt=\"\" class=\"wp-image-2152\" title=\"heart-schem\"\/><\/a><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright is-resized\"><a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/heart.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/heart-300x244.jpg\" alt=\"\" class=\"wp-image-2154\" width=\"345\" height=\"280\" title=\"heart\"\/><\/a><\/figure><\/div>\n\n\n\n<p>When an oil drop is placed on a water surface, it assumes the form of a sessile lens. We consider the curious behaviour that may arise when the oil contains a water-insoluble surfactant: the lens radius oscillates in a quasi-periodic fashion. While this oscillatory behaviour has been reported elsewhere, a consistent physical explanation has yet to be given. We present the results of an experimental investigation that enable us to elucidate the subtle mechanism responsible. Videomicroscopy reveals that the beating behaviour is generated by a subtle process of partial emulsification at the lens edge and sustained by evaporation of surfactant from the water surface.<\/p>\n\n\n\n<p>See paper here: &nbsp;<a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/beating-heart.pdf\">Stocker &amp; Bush (2007)<\/a><\/p>\n\n\n\n<p>PRESS:  <a href=\"http:\/\/news.softpedia.com\/news\/Mystery-of-Oil-Drop-In-Water-Pumping-Like-a-Beating-Heart-60208.shtml\">Softpedia<\/a>&nbsp;<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":3987,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-3984","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-interfacial-flows","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Spontaneous oscillations of a floating fluid lens - John W. M. Bush<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spontaneous oscillations of a floating fluid lens - John W. M. Bush\" \/>\n<meta property=\"og:url\" content=\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/\" \/>\n<meta property=\"og:site_name\" content=\"John W. M. Bush\" \/>\n<meta property=\"article:published_time\" content=\"2007-03-14T10:41:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-04-15T01:22:27+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/thales.mit.edu\/bush\/wp-content\/uploads\/2021\/03\/lens.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"294\" \/>\n\t<meta property=\"og:image:height\" content=\"239\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\">\n\t<meta name=\"twitter:data1\" content=\"1 minute\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"http:\/\/thales.mit.edu\/bush\/#website\",\"url\":\"http:\/\/thales.mit.edu\/bush\/\",\"name\":\"John W. M. Bush\",\"description\":\"Professor of Applied Mathematics, MIT\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"http:\/\/thales.mit.edu\/bush\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"ImageObject\",\"@id\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/#primaryimage\",\"inLanguage\":\"en-US\",\"url\":\"http:\/\/thales.mit.edu\/bush\/wp-content\/uploads\/2021\/03\/lens.jpg\",\"contentUrl\":\"http:\/\/thales.mit.edu\/bush\/wp-content\/uploads\/2021\/03\/lens.jpg\",\"width\":294,\"height\":239,\"caption\":\"lens\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/#webpage\",\"url\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/\",\"name\":\"Spontaneous oscillations of a floating fluid lens - John W. M. Bush\",\"isPartOf\":{\"@id\":\"http:\/\/thales.mit.edu\/bush\/#website\"},\"primaryImageOfPage\":{\"@id\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/#primaryimage\"},\"datePublished\":\"2007-03-14T10:41:00+00:00\",\"dateModified\":\"2021-04-15T01:22:27+00:00\",\"author\":{\"@id\":\"http:\/\/thales.mit.edu\/bush\/#\/schema\/person\/a9fe68c435ef049a3b089b5bb46446b1\"},\"breadcrumb\":{\"@id\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/thales.mit.edu\/bush\/\",\"url\":\"https:\/\/thales.mit.edu\/bush\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@id\":\"http:\/\/thales.mit.edu\/bush\/index.php\/2007\/03\/14\/spontaneous-oscillations-of-a-floating-fluid-lens\/#webpage\"}}]},{\"@type\":\"Person\",\"@id\":\"http:\/\/thales.mit.edu\/bush\/#\/schema\/person\/a9fe68c435ef049a3b089b5bb46446b1\",\"name\":\"John WM Bush\",\"url\":\"http:\/\/thales.mit.edu\/bush\/index.php\/author\/bush\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/posts\/3984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/comments?post=3984"}],"version-history":[{"count":6,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/posts\/3984\/revisions"}],"predecessor-version":[{"id":6833,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/posts\/3984\/revisions\/6833"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/media\/3987"}],"wp:attachment":[{"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/media?parent=3984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/categories?post=3984"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/thales.mit.edu\/bush\/index.php\/wp-json\/wp\/v2\/tags?post=3984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}