{"id":3975,"date":"2010-03-14T10:32:00","date_gmt":"2010-03-14T10:32:00","guid":{"rendered":"http:\/\/thales.mit.edu\/bush\/?p=3975"},"modified":"2021-04-15T01:21:30","modified_gmt":"2021-04-15T01:21:30","slug":"water-entry-and-cavity-dynamics","status":"publish","type":"post","link":"http:\/\/thales.mit.edu\/bush\/index.php\/2010\/03\/14\/water-entry-and-cavity-dynamics\/","title":{"rendered":"Water entry and cavity dynamics"},"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=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/thales.mit.edu\/bush\/wp-content\/uploads\/2021\/04\/ImpactCavity.png\" alt=\"\" class=\"wp-image-5218\" width=\"615\" height=\"477\"\/><\/figure><\/div>\n\n\n\n<p class=\"tw-text-wide\">We present the results of a combined experimental and theoretical investigation of the vertical impact of low-density spheres on a water surface. Particular attention is given to characterizing the sphere dynamics and the influence of its deceleration on the shape of the resulting air cavity. A theoretical model is developed which yields simple expressions for the pinch-off time and depth, as well as the volume of air entrained by the sphere. Theoretical predictions compare favorably with our experimental observations, and allow us to rationalize the form of water-entry cavities resulting from the impact of buoyant and nearly buoyant spheres.<\/p>\n\n\n\n<p>See  &nbsp;<a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2012\/04\/Aristoff-PoF.pdf\">Aristoff, Truscott, Techet &amp; Bush (2010)<\/a><\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":5221,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-3975","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>Water entry and cavity dynamics - 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=\"https:\/\/thales.mit.edu\/bush\/index.php\/2010\/03\/14\/water-entry-and-cavity-dynamics\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Water entry and cavity dynamics - John W. M. Bush\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thales.mit.edu\/bush\/index.php\/2010\/03\/14\/water-entry-and-cavity-dynamics\/\" \/>\n<meta property=\"og:site_name\" content=\"John W. M. 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