{"id":340050,"date":"2016-12-13T03:00:00","date_gmt":"2016-12-13T00:00:00","guid":{"rendered":"https:\/\/www.fyysika.ee\/?guid=28e60b62cb97e372ec8efbbc4b7c8953"},"modified":"2016-12-13T03:00:00","modified_gmt":"2016-12-13T00:00:00","slug":"the-macroscopic-pancake-bounce-2","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=340050","title":{"rendered":"The macroscopic pancake bounce"},"content":{"rendered":"<p>We demonstrate that the so-called pancake bounce of millimetric water droplets on surfaces patterned<br \/>\nwith hydrophobic posts (Liu et al 2014 Nat. Phys. 10 [http:\/\/https:\/\/doi.org\/10.1038\/nphys2980] 515<br \/>\n) can be reproduced on larger scales. In our experiment, a bed of nails plays the role of the<br \/>\nstructured surface and a water balloon models the water droplet. The macroscopic version largely<br \/>\nreproduces the features of the microscopic experiment, including the Weber number dependence and the<br \/>\nreduced contact time for pancake bouncing. The scalability of the experiment confirms the mechanisms<br \/>\nof pancake bouncing, and allows us to measure the force exerted on the surface during the bounce.<br \/>\nThe experiment is simple and inexpensive and is an example where front-line research is accessible<br \/>\nto student projects.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We demonstrate that the so-called pancake bounce of millimetric water droplets on surfaces patterned<br \/>\nwith hydrophobic posts (Liu et al 2014 Nat. Phys. 10 [http:\/\/https:\/\/doi.org\/10.1038\/nphys2980] 515<br \/>\n) can be reproduced on larger scales. In our expe&#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-340050","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\/340050","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=340050"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/340050\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=340050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=340050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=340050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}