{"id":109724,"date":"2015-08-03T03:00:00","date_gmt":"2015-08-03T00:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=7f082c4861be2c43b11666a4b9041336"},"modified":"2015-08-03T03:00:00","modified_gmt":"2015-08-03T00:00:00","slug":"teaching-rayleigh-plateau-instabilities-in-the-laboratory","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=109724","title":{"rendered":"Teaching Rayleigh\u2013Plateau instabilities in the laboratory"},"content":{"rendered":"<p>The breakup of a liquid jet into spherical droplets via the Rayleigh\u2013Plateau instability is a common<br \/>\nand fundamental part of fluid mechanics. However, teaching this instability in a laboratory setting<br \/>\nis challenging, requiring sophisticated methods to generate and study the jet dynamics. Recently,<br \/>\ntoroidal droplets were shown to break into one or more spherical droplets in the thin-drop limit via<br \/>\nthe Rayleigh\u2013Plateau instability. We propose a simple experimental setup to generate toroidal<br \/>\ndroplets that break up on the order of tens of seconds, allowing for easy video capture using a<br \/>\nbasic CCD camera. With this setup, it is possible to quantify the Rayleigh\u2013Plateau instability in a<br \/>\npedagogical laboratory setting. In addition, the role of curvature on jet breakup can be explored<br \/>\nusing thick toroidal droplets. We envision this setup as a powerful teaching tool for one of the<br \/>\nmost fundamental fluid dynamics processes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The breakup of a liquid jet into spherical droplets via the Rayleigh\u2013Plateau instability is a common<br \/>\nand fundamental part of fluid mechanics. However, teaching this instability in a laboratory setting<br \/>\nis challenging, requiring sophisticated methods&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-109724","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/109724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=109724"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/109724\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=109724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=109724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=109724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}