{"id":482,"date":"2026-09-29T13:05:02","date_gmt":"2026-09-29T13:05:02","guid":{"rendered":"https:\/\/www.auriga.polimi.it\/index.php\/lab\/mass-transfer-column\/"},"modified":"2026-10-07T07:54:51","modified_gmt":"2026-10-07T07:54:51","slug":"mass-transfer-column","status":"publish","type":"page","link":"https:\/\/www.auriga.polimi.it\/index.php\/lab\/mass-transfer-column\/","title":{"rendered":"Mass-transfer column"},"content":{"rendered":"\n<p class=\"is-style-eyebrow wp-block-paragraph\">Small scale \u00b7 Work package b and c<\/p>\n\n\n\n<div class=\"wp-block-group facility-flow\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<figure class=\"wp-block-image size-full rig-drawing\"><img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"849\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/rig-mass-transfer.png\" alt=\"CAD elevation of the mass-transfer column\" class=\"wp-image-347\" srcset=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/rig-mass-transfer.png 204w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/rig-mass-transfer-72x300.png 72w\" sizes=\"auto, (max-width: 204px) 100vw, 204px\" \/><\/figure>\n\n\n\n<p class=\"is-style-lede wp-block-paragraph\">A transparent single-bubble column consisting of a 5 cm internal-diameter cylindrical test section surrounded by a square outer container, equipped with a controlled gas injection system and a two-camera stereoscopic imaging setup, designed to track individual bubbles and quantify their three-dimensional volume evolution with high spatial and temporal resolution. The square outer section provides flat optical interfaces around the cylindrical column, reducing image distortion during stereoscopic acquisition.<\/p>\n\n\n\n<p class=\"is-style-prose wp-block-paragraph\">The facility is designed to investigate gas\u2013liquid mass transfer at the single-bubble scale under well-controlled operating conditions. Individual bubbles are generated reproducibly and followed during their rise through the liquid phase. Two synchronized high-speed cameras observe the bubble from different viewing directions, while a controlled backlighting system provides high-contrast bubble contours. Following stereo calibration, the simultaneous images are combined to reconstruct the three-dimensional bubble geometry and determine its instantaneous volume, shape, position, and rising velocity.<\/p>\n\n\n\n<p class=\"is-style-prose wp-block-paragraph\">Tracking the progressive decrease in bubble volume during CO\u2082 absorption provides a direct measurement of the gas transfer rate and enables the estimation of the liquid-side mass-transfer coefficient, independently of integral column-scale measurements. The facility therefore provides well-defined experimental data for investigating the coupling between bubble hydrodynamics, deformation, and mass transfer, as well as for the development and validation of single-bubble and CFD-based mass-transfer models.<\/p>\n<\/div><\/div>\n\n\n\n<p class=\"is-style-eyebrow facility-figures-label wp-block-paragraph\">Measurement set-up<\/p>\n\n\n\n<div class=\"wp-block-group facility-figures is-single\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<figure class=\"wp-block-image size-full fig-diagram\"><a href=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1300\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram.png\" alt=\"Diagram of the single-bubble mass-transfer facility: syringe pump feeding CO2 to the needle at the base of the column, the stereoscopic cameras around the measurement section, and the top view of the camera layout\" class=\"wp-image-510\" srcset=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram.png 1800w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram-300x217.png 300w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram-1024x740.png 1024w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram-768x555.png 768w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/mass-transfer-rig-diagram-1536x1109.png 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/a><figcaption class=\"wp-element-caption\">Open the diagram at full size<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<nav class=\"facility-nav\" aria-label=\"Other facilities\"><p class=\"is-style-eyebrow\">Other facilities<\/p><ul><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=477\">Single-bubble column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=478\">Bubble-swarm column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=479\">Circular bubble-swarm column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=480\">Coalescence cell<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=481\">CFD-grade column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=499\">Large-diameter bubble column<\/a><\/li><\/ul><\/nav>\n\n\n\n<p class=\"is-style-back wp-block-paragraph\"><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=13\">\u2190 Back to Lab<\/a><\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Small scale \u00b7 Work package b and c A transparent single-bubble column consisting of a 5 cm internal-diameter cylindrical test section surrounded by a square outer container, equipped with a controlled gas injection system and a two-camera stereoscopic imaging setup, designed to track individual bubbles and quantify their three-dimensional volume evolution with high spatial and [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":13,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-482","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages\/482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/types\/page"}],"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=482"}],"version-history":[{"count":0,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages\/482\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages\/13"}],"wp:attachment":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/media?parent=482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}