{"id":321686,"date":"2016-11-21T03:00:00","date_gmt":"2016-11-21T00:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=033ffc8d621645eae6923a9c61ab99d9"},"modified":"2016-11-21T03:00:00","modified_gmt":"2016-11-21T00:00:00","slug":"dynamics-of-a-flying-chimney","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=321686","title":{"rendered":"Dynamics of a \u2018flying chimney\u2019"},"content":{"rendered":"<p>The \u2018flying chimney\u2019, where a paper cylinder floats when set alight, is an interesting phenomenon<br \/>\nthat lacks both systematic theoretical and experimental investigation. To investigate the dynamics<br \/>\nof liftoff, an appropriate chimney material was first selected from 22 kinds of traditional Chinese<br \/>\nXuan paper. Subsequent experiments with this paper, examining the relationship between the<br \/>\nlikelihood of liftoff and the height of the air-gap under the cylinder, show the necessity of a gap<br \/>\nand the ideal minimum height required to assure successful liftoff. We experimentally investigate<br \/>\nthe cylinder geometry, determining the optimal parameters for height and diameter, and the boundary<br \/>\nconditions for which liftoff can occur. In order to reveal the mechanism of liftoff, a physical<br \/>\nmodel in which the viscous force is reasonably suggested to be a key kinetic parameter is proposed.<br \/>\nThe viscous force can be obtained by substituting the velocity field of heated air-flow into the<br \/>\nconstitutive e&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The \u2018flying chimney\u2019, where a paper cylinder floats when set alight, is an interesting phenomenon<br \/>\nthat lacks both systematic theoretical and experimental investigation. To investigate the dynamics<br \/>\nof liftoff, an appropriate chimney material was f&#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-321686","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\/321686","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=321686"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/321686\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=321686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=321686"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=321686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}