{"id":4985,"date":"2021-04-02T18:35:13","date_gmt":"2021-04-02T18:35:13","guid":{"rendered":"http:\/\/thales.mit.edu\/bush\/?p=4985"},"modified":"2021-04-07T15:20:46","modified_gmt":"2021-04-07T15:20:46","slug":"water-entry-of-small-hydrophobic-spheres","status":"publish","type":"post","link":"http:\/\/thales.mit.edu\/bush\/index.php\/2021\/04\/02\/water-entry-of-small-hydrophobic-spheres\/","title":{"rendered":"Water entry of small hydrophobic spheres"},"content":{"rendered":"\n<div class=\"wp-block-cover alignwide 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=\"alignright is-resized\"><a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/Cover-JFM-Splash.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/11\/Cover-JFM-Splash.jpg\" alt=\"\" class=\"wp-image-1999\" width=\"275\" height=\"386\" title=\"Cover-JFM-Splash\"\/><\/a><\/figure><\/div>\n\n\n\n<p class=\"tw-text-wide\">We considered the impact of small hydrophobic spheres on a water surface.&nbsp;Particular attention was given to characterizing the shape of the resulting air cavity when the cavity collapse is driven principally by surface tension rather than gravity. A parameter study revealed the dependence of the cavity structure on the governing dimensionless groups. A theoretical description based on the solution to the Rayleigh\u2013Besant problem was developed to describe the evolution of the cavity shape and yields an analytical solution for the pinch-off time and the sphere\u2019s depth at cavity pinch-off.<\/p>\n\n\n\n<p>See paper&nbsp;<a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/09\/aristoff-splash.pdf\">Aristoff &amp; Bush, JFM (2009)<\/a>&nbsp;.<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":4969,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-4985","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-covers","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Water entry of small hydrophobic spheres - John W. 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