{"id":238634,"date":"2010-01-27T19:56:29","date_gmt":"2010-01-28T00:56:29","guid":{"rendered":"http:\/\/blog.metasd.com\/?p=788"},"modified":"2010-01-27T19:56:29","modified_gmt":"2010-01-28T00:56:29","slug":"hadley-cells-for-lunch","status":"publish","type":"post","link":"https:\/\/mereja.media\/index\/238634","title":{"rendered":"Hadley cells for lunch"},"content":{"rendered":"<p><a href=\"http:\/\/blog.metasd.com\/wp-content\/uploads\/2010\/01\/IMG_87001.JPG\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-790\" title=\"quinoa convection\" src=\"http:\/\/blog.metasd.com\/wp-content\/uploads\/2010\/01\/IMG_87001.JPG\" alt=\"quinoa convection\" width=\"499\" height=\"495\" \/><\/a><\/p>\n<p>At lunch today we were amazed by these near-perfect convection cells that formed in a pot of quinoa. You can <a href=\"http:\/\/www.esrl.noaa.gov\/psd\/outreach\/education\/science\/convection\/Table.html\">DIY at NOAA<\/a>. I think this is an instance of <a href=\"http:\/\/en.wikipedia.org\/wiki\/B%C3%A9nard_cell#Rayleigh-B.C3.A9nard_and_B.C3.A9nard-Marangoni_convection\">Benard-Marangoni<\/a> convection, because the surface is free, though the thinness assumptions are likely violated, and quinoa is not quite an ideal liquid. Anyway, it&#8217;s an interesting phenomenon because the dynamics involve a surface tension gradient, not just heat transfer. See <a href=\"http:\/\/www.physics.utoronto.ca\/~nonlin\/thermal.html\">this<\/a> and <a href=\"http:\/\/www.osti.gov\/bridge\/purl.cover.jsp?purl=\/6233909-MRLV6I\/\">this<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>At lunch today we were amazed by these near-perfect convection cells that formed in a pot of quinoa. You can DIY at NOAA. I think this is an instance of Benard-Marangoni convection, because the surface is free, though the thinness assumptions are likely violated, and quinoa is not quite an ideal liquid. Anyway, it&#8217;s an [&hellip;]<\/p>\n","protected":false},"author":818,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-238634","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/238634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/users\/818"}],"replies":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/comments?post=238634"}],"version-history":[{"count":0,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/238634\/revisions"}],"wp:attachment":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/media?parent=238634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/categories?post=238634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/tags?post=238634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}