{"id":253,"date":"2017-01-03T12:20:37","date_gmt":"2017-01-03T11:20:37","guid":{"rendered":"http:\/\/dikoweb.de\/blog\/?p=253"},"modified":"2024-12-12T18:18:46","modified_gmt":"2024-12-12T18:18:46","slug":"why-do-bubbles-in-guinness-sink","status":"publish","type":"post","link":"https:\/\/dikoweb.de\/?p=253","title":{"rendered":"Why do bubbles in Guinness sink?"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"378\" height=\"500\" src=\"https:\/\/dikoweb.de\/wp-content\/uploads\/2017\/01\/ajp_cover_image-15424828.jpg\" alt=\"\" class=\"wp-image-3905\" style=\"width:210px;height:auto\" srcset=\"https:\/\/dikoweb.de\/wp-content\/uploads\/2017\/01\/ajp_cover_image-15424828.jpg 378w, https:\/\/dikoweb.de\/wp-content\/uploads\/2017\/01\/ajp_cover_image-15424828-227x300.jpg 227w\" sizes=\"auto, (max-width: 378px) 100vw, 378px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Bierblasen steigen von unten nach oben. Nicht immer! Wenn ihr Liebhaber des Guiness Bieres seid, habt ihr das &#8222;Ph\u00e4nomen&#8220; sicher schon mal gesehen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Doch wie kommt das Verhalten zustande? Eine Forschergruppe (Eugene Benilov, William Lee und Cathal Cummins) hat dies nun untersucht und auf eine ungleichm\u00e4\u00dfige Form des Glases zur\u00fcckgef\u00fchrt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nachzulesen in ihrer Studie unter <a href=\"https:\/\/arxiv.org\/pdf\/1205.5233v1\" target=\"_blank\" rel=\"noopener noreferrer\">arvix.org<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8222;<em>In this paper, we demonstrate using simulations and experiment that the flow in a glass of stout depends on the shape of the glass. If it narrows downwards (as the traditional stout glass, the pint, does), the flow is directed downwards near the wall and upwards in the interior and sinking bubbles will be observed. If the container widens downwards, the flow is opposite to that described above and only rising bubbles will be seen.<\/em>&#8222;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Erg\u00e4nzend gibt es ein <a href=\"https:\/\/arxiv.org\/src\/1205.5233v1\/anc\/tilted_cylinder.avi\" target=\"_blank\" rel=\"noopener noreferrer\">kurzes Video<\/a> dazu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"font-size: 10pt;\">Website besucht am 2017-01-03. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bierblasen steigen von unten nach oben. Nicht immer! Wenn ihr Liebhaber des Guiness Bieres seid, habt ihr das &#8222;Ph\u00e4nomen&#8220; sicher schon mal gesehen. Doch wie kommt das Verhalten zustande? Eine Forschergruppe (Eugene Benilov, William Lee und Cathal Cummins) hat dies nun untersucht und auf eine ungleichm\u00e4\u00dfige Form des Glases zur\u00fcckgef\u00fchrt. Nachzulesen in ihrer Studie unter [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[1,92,11],"tags":[176,191],"class_list":["post-253","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-bier","category-studien","tag-bier","tag-guiness"],"_links":{"self":[{"href":"https:\/\/dikoweb.de\/index.php?rest_route=\/wp\/v2\/posts\/253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dikoweb.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dikoweb.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dikoweb.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/dikoweb.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=253"}],"version-history":[{"count":1,"href":"https:\/\/dikoweb.de\/index.php?rest_route=\/wp\/v2\/posts\/253\/revisions"}],"predecessor-version":[{"id":3906,"href":"https:\/\/dikoweb.de\/index.php?rest_route=\/wp\/v2\/posts\/253\/revisions\/3906"}],"wp:attachment":[{"href":"https:\/\/dikoweb.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dikoweb.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dikoweb.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}