{"id":474,"date":"2026-08-21T10:00:00","date_gmt":"2026-08-21T10:00:00","guid":{"rendered":"https:\/\/www.auriga.polimi.it\/index.php\/bubble-column-database\/"},"modified":"2026-09-29T12:55:50","modified_gmt":"2026-09-29T12:55:50","slug":"bubble-column-database","status":"publish","type":"post","link":"https:\/\/www.auriga.polimi.it\/index.php\/bubble-column-database\/","title":{"rendered":"A database of bubble column experiments"},"content":{"rendered":"\n<p class=\"is-style-lede wp-block-paragraph\">Within AURIGA, a database of bubble column experiments has been compiled. It is the common basis for the assessment of existing correlations and for the development of new models for the flow regime transitions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The database collects 209 gas holdup curves from 35 sources, for a total of about 6400 measured points. Each experiment carries the column geometry, the sparger, the properties of the gas and of the liquid and the operating conditions, together with the flow regime transitions identified along the holdup curve. The database also includes 559 local radial profiles, for example of gas holdup, bubble size and bubble velocity.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2124\" height=\"1193\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029.png\" alt=\"One air-water experiment from the database: drift flux against global gas holdup with the regime transition marked, local gas holdup profiles at two heights, and bubble size distributions at the centre and at the wall\" class=\"wp-image-475\" srcset=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029.png 2124w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029-300x169.png 300w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029-1024x575.png 1024w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029-768x431.png 768w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029-1536x863.png 1536w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/bubble-column-database-exp029-2048x1150.png 2048w\" sizes=\"auto, (max-width: 2124px) 100vw, 2124px\" \/><figcaption class=\"wp-element-caption\">One experiment of the database, air and water in a 0.24 m column. Left: drift flux against global gas holdup, with the transition to the heterogeneous regime (T<sub>2<\/sub>). Centre: local gas holdup profiles at two heights. Right: bubble size distributions at the centre and at the wall.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The experiments cover column diameters from 0.095 to 1 m, liquid viscosities from 0.3 to 15 mPa s and surface tensions from 20 to 82 mN\/m. The spargers include perforated and porous plates, orifices, membranes and needles.<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Within AURIGA, a database of bubble column experiments has been compiled. It is the common basis for the assessment of existing correlations and for the development of new models for the flow regime transitions. The database collects 209 gas holdup curves from 35 sources, for a total of about 6400 measured points. Each experiment carries [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":475,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-474","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/posts\/474","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/comments?post=474"}],"version-history":[{"count":0,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/posts\/474\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/media\/475"}],"wp:attachment":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/media?parent=474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/categories?post=474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/tags?post=474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}