{"id":1280,"date":"2021-12-09T11:27:16","date_gmt":"2021-12-09T10:27:16","guid":{"rendered":"https:\/\/iop.fnwi.uva.nl\/scm\/wordpress_test\/?p=1280"},"modified":"2026-10-19T21:32:29","modified_gmt":"2026-10-19T20:32:29","slug":"drops-sprays","status":"publish","type":"post","link":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2021\/12\/09\/drops-sprays\/","title":{"rendered":"Drops and sprays"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1280\" class=\"elementor elementor-1280\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3e90a43 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3e90a43\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-33698f99\" data-id=\"33698f99\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6a36531c elementor-widget elementor-widget-text-editor\" data-id=\"6a36531c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.5.5 - 03-02-2022 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#818a91;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#818a91;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<div style=\"font-family: inherit; color: #43545a; line-height: 1.7;\"><!-- INTRODUCTION -->\n<p style=\"font-size: 19px; line-height: 1.7; margin: 0 0 20px 0;\"><strong style=\"color: #344a52; font-weight: 600;\"> From inkjet printing to fine sprays, the motion and breakup of liquid droplets shape countless everyday processes. But how do droplets influence one another, how far can they travel, and what determines when a liquid jet breaks apart? <\/strong><\/p>\n<p style=\"font-size: 19px; line-height: 1.7; margin: 0 0 20px 0;\">In the Soft Matter group, we investigate these questions using precisely controlled droplet trains, high-speed imaging, and experimental fluid dynamics. We explore how interactions between neighbouring droplets affect their motion and coalescence, and how surrounding air influences the formation and propagation of spray clouds.<\/p>\n<p style=\"font-size: 19px; line-height: 1.7; margin: 0 0 28px 0;\">Our research also reveals how tiny thermal fluctuations can trigger the breakup of liquid jets, connecting the physics of nanoscale jets to everyday dripping and spraying. Together, these studies uncover the fundamental mechanisms governing drops, jets, and sprays.<\/p>\n<!-- RESEARCH FOCUS -->\n<div style=\"background: #F2F7F8; border-left: 3px solid #10708A; border-radius: 0 10px 10px 0; padding: 19px 23px; margin: 26px 0 36px 0;\">\n<div style=\"font-size: 12px; font-weight: bold; letter-spacing: 1.3px; text-transform: uppercase; color: #10708a; margin-bottom: 9px;\">Research Focus<\/div>\n<p style=\"font-size: 17px; line-height: 1.65; margin: 0; color: #43545a;\">Understanding how droplet interactions, surrounding air, and microscopic fluctuations govern the formation, motion, and breakup of liquid sprays.<\/p>\n<\/div>\n<!-- PUBLICATIONS HEADING -->\n<h3 style=\"font-size: 23px; font-weight: 650; color: #243e47; margin: 0 0 8px 0;\">Selected Publications<\/h3>\n<p style=\"font-size: 16px; color: #667a80; margin: 0 0 22px 0;\">Recent research exploring the physics of droplets, jets, and sprays.<\/p>\n<!-- PUBLICATION 1 -->\n<div style=\"background: #FFFFFF; border: 1px solid #E0E9EC; border-radius: 12px; padding: 16px 24px; margin-bottom: 14px;\">\n<a style=\"color: #10708a; font-size: 19px; font-weight: 650; line-height: 1.45; text-decoration: none;\" href=\"https:\/\/doi.org\/10.1103\/ysbc-7qd2\" target=\"_blank\" rel=\"noopener noreferrer\"> Ambient air pressure controls spray cloud formation \u2197 <\/a>\n<p style=\"font-size: 14px; color: #74868b; margin: 8px 0 12px 0;\">A. Parrenin, C. van Rijn &amp; D. Bonn \u00a0\u00b7\u00a0 <em>Physical Review Fluids<\/em> \u00a0\u00b7\u00a0 2026<\/p>\n<p style=\"font-size: 16px; line-height: 1.65; margin: 0;\">How does surrounding air shape a spray? Experiments reveal that friction with air drives the formation of expanding spray clouds, while reducing ambient pressure can suppress their characteristic spreading altogether.<\/p>\n<\/div>\n<!-- PUBLICATION 2 -->\n<div style=\"background: #FFFFFF; border: 1px solid #E0E9EC; border-radius: 12px; padding: 16px 24px; margin-bottom: 14px;\">\n<a style=\"color: #10708a; font-size: 19px; font-weight: 650; line-height: 1.45; text-decoration: none;\" href=\"https:\/\/doi.org\/10.1103\/jf6w-l5sy\" target=\"_blank\" rel=\"noopener noreferrer\"> What Determines the Breakup Length of a Jet? \u2197 <\/a>\n<p style=\"font-size: 14px; color: #74868b; margin: 8px 0 12px 0;\">S. Kooij, D. T. A. Jordan, C. J. M. van Rijn, N. M. Ribe &amp; D. Bonn \u00a0\u00b7\u00a0 <em>Physical Review Letters<\/em> \u00a0\u00b7\u00a0 2025<\/p>\n<p style=\"font-size: 16px; line-height: 1.65; margin: 0;\">Why does a liquid jet eventually break into droplets? This study demonstrates that intrinsic thermal capillary waves can initiate jet breakup, providing a unified explanation across scales from nanojets to everyday liquid streams.<\/p>\n<\/div>\n<!-- PUBLICATION 3 -->\n<div style=\"background: #FFFFFF; border: 1px solid #E0E9EC; border-radius: 12px; padding: 16px 24px; margin-bottom: 14px;\">\n<a style=\"color: #10708a; font-size: 19px; font-weight: 650; line-height: 1.45; text-decoration: none;\" href=\"https:\/\/doi.org\/10.1063\/5.0221806\" target=\"_blank\" rel=\"noopener noreferrer\"> Effect of coalescence on the propagation of water droplets from a jet \u2197 <\/a>\n<p style=\"font-size: 14px; color: #74868b; margin: 8px 0 12px 0;\">A. Parrenin, S. Kooij, C. J. M. van Rijn &amp; D. Bonn \u00a0\u00b7\u00a0 <em>Physics of Fluids<\/em> \u00a0\u00b7\u00a0 2024<\/p>\n<p style=\"font-size: 16px; line-height: 1.65; margin: 0;\">Droplets travelling together behave differently from isolated drops. This work investigates how collisions and coalescence change droplet size distributions and influence the propagation of droplet trains.<\/p>\n<\/div>\n<!-- PUBLICATION 4 -->\n<div style=\"background: #FFFFFF; border: 1px solid #E0E9EC; border-radius: 12px; padding:16px 24px; margin-bottom: 30px;\">\n<a style=\"color: #10708a; font-size: 19px; font-weight: 650; line-height: 1.45; text-decoration: none;\" href=\"https:\/\/doi.org\/10.1038\/s41598-022-21943-5\" target=\"_blank\" rel=\"noopener noreferrer\"> Self-charging of sprays \u2197 <\/a>\n<p style=\"font-size: 14px; color: #74868b; margin: 8px 0 12px 0;\">S. Kooij, C. van Rijn, N. Ribe &amp; D. Bonn \u00a0\u00b7\u00a0 <em>Scientific Reports<\/em> \u00a0\u00b7\u00a0 2022<\/p>\n<p style=\"font-size: 16px; line-height: 1.65; margin: 0;\">Liquid sprays can acquire electrical charge during their formation. This study explores the mechanisms behind spray self-charging, adding another dimension to our understanding of droplet generation and behaviour.<\/p>\n<\/div>\n<!-- CONTACT -->\n<p style=\"border-top: 1px solid #E0E9EC; padding-top: 18px; margin: 0; font-size: 15px; color: #667a80;\"><strong style=\"color: #344a52;\">Research contact:<\/strong> Daniel Bonn \u00a0\u00b7\u00a0 <a style=\"color: #10708a; text-decoration: none;\" href=\"mailto:d.bonn@uva.nl\"> d.bonn@uva.nl \u2197 <\/a><\/p>\n<\/div>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>From inkjet printing to fine sprays, the motion and breakup of liquid droplets shape countless everyday processes. But how do droplets influence one another, how far can they travel, and what determines when a liquid jet breaks apart? In the Soft Matter group, we investigate these questions using precisely controlled droplet trains, high-speed imaging, and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1722,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,1],"tags":[],"_links":{"self":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts\/1280"}],"collection":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/comments?post=1280"}],"version-history":[{"count":12,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts\/1280\/revisions"}],"predecessor-version":[{"id":5026,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts\/1280\/revisions\/5026"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/media\/1722"}],"wp:attachment":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/media?parent=1280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/categories?post=1280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/tags?post=1280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}