{"id":27652,"date":"2026-05-19T10:30:00","date_gmt":"2026-05-19T08:30:00","guid":{"rendered":"https:\/\/greth.fr\/?p=27652"},"modified":"2026-05-19T11:10:29","modified_gmt":"2026-05-19T09:10:29","slug":"intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus","status":"publish","type":"post","link":"https:\/\/greth.fr\/en\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\/","title":{"rendered":"Intensification of transfer phenomena via ultrasound in continuous milli-reactors"},"content":{"rendered":"\n\n<strong><span style=\"text-decoration: underline;\">Summary:<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\">Miniaturisation consists of carrying out operations in micrometric or millimetric devices that usually take place in centimetric or metric devices. The reason for this practice is to increase the surface\/volume ratio in order to intensify the transfer phenomena (mass and thermal). This makes it possible to further increase the control of the operating conditions (pressure, temperature, etc.) and to improve the performance of the operation (yield, selectivity, etc.). However, the confinement of the operating environment generally implies a laminar flow in it, which can cause mixing problems while promoting fouling and plugging. Ultrasound can be used to solve these problems through the effects generated by the radiation force such as acoustic currents and acoustic cavitation. The objective of the thesis was to study a single-phase (liquid\/liquid) and a two-phase (liquid\/solid) mixture in a mini ultrasonic channel called MERCUS (Mini-Exchanger-Reactor Continuous UltraSound). For both systems, a spatio-temporal analysis of the mixture was carried out as a function of the ratio of electrical power to flow rate, viscosity and the time ratio of ultrasound application. The liquid\/liquid mixing analysis is based on a colorimetric method relating the grey scale level to the concentration of solute E133 from monochrome (black and white) pictures of the mixing zone. The analysis of the liquid\/solid mixture is based on a binarisation method using the contrast between water and polyamide particles to binarise monochrome pictures of the mixing zone. Ultrasonic waves have been shown to homogenise the two systems in less than two seconds (the mixing speed depends on the power and flow rate). An optimum electrical energy density to homogenise the two systems (without unnecessary energy losses) was detected at 260 J\/ml for our ultrasonic channel when the viscosity of the medium was 1 mPa[dollar]times[dollar]s. Increasing the viscosity and reducing the ultrasonic application time ratio degraded the mixture. Finally, the results showed that regardless of the method of ultrasonic application (continuous or intermittent) the mixing quality of the system (single-phase or two-phase) depends mainly on the amount of energy per volume transmitted to the flowing fluid.<\/p>\n<table border=\"1\" width=\"100%\">\n<tbody>\n<tr>\n<td><strong>Author<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Louis AHOURE<\/td>\n<\/tr>\n<tr>\n<td><strong>Date of presentation<\/strong><\/td>\n<\/tr>\n<tr>\n<td>2023, june 02nd<\/td>\n<\/tr>\n<tr>\n<td><strong>Keywords<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Milli-Channel, Colorimetry, Mixing, Ultrasound<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div class=\"eds-animate edsanimate-sis-hidden \" data-eds-entry-animation=\"bounceIn\" data-eds-entry-delay=\"0\" data-eds-entry-duration=\"1\" data-eds-entry-timing=\"linear\" data-eds-exit-animation=\"\" data-eds-exit-delay=\"\" data-eds-exit-duration=\"\" data-eds-exit-timing=\"\" data-eds-repeat-count=\"1\" data-eds-keep=\"yes\" data-eds-animate-on=\"load\" data-eds-scroll-offset=\"\">\n\t\t<div class=\"box info  \">\n\t\t\t<div class=\"box-inner-block\">\n\t\t\t\t<span class=\"fa tie-shortcode-boxicon\"><\/span>\n<p style=\"text-align: justify;\"><strong>&#x2666; The full version is only available for subscribers <a style=\"text-decoration: none;\" href=\"\/offre-du-greth\/\"><span style=\"background-color: #3db2ea; color: #fff;\">\"ESSENTIEL\"<\/span><\/a> or <a style=\"text-decoration: none;\" href=\"\/offre-du-greth\/\"><span style=\"background-color: #c6002c; color: #fff;\">\"PREMIUM\"<\/span><\/a> of GRETh!<\/strong><\/p>\n<p>&#x2666; If you are already a member \/ subscriber, you must identify yourself by <a href=\"\/wp-login.php\"><strong>clicking here<\/strong><\/a>.<br \/>\n&#x2666; If you are not a member, you can consult the offer proposed by GRETh by <a href=\"\/offre-du-greth\/\"><strong>clicking here<\/strong><\/a> as well as the conditions of membership by <a href=\"\/conditions-adhesion\/\"><strong>clicking here<\/strong><\/a>.\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>R\u00e9sum\u00e9 : La miniaturisation consiste \u00e0 r\u00e9aliser dans des dispositifs de taille microm\u00e9trique ou millim\u00e9trique des op\u00e9rations qui ont lieu habituellement dans des dispositifs de taille centim\u00e9trique ou m\u00e9trique. L&#8217;int\u00e9r\u00eat de cette pratique est d&#8217;augmenter le ratio surface\/volume dans le but d&#8217;intensifier les ph\u00e9nom\u00e8nes de transfert (massique et thermique). Cela permet d&#8217;accro\u00eetre d&#8217;avantage le contr\u00f4le des conditions op\u00e9ratoires (pression, temp\u00e9rature, etc) et d&#8217;am\u00e9liorer les performances de l&#8217;op\u00e9ration (rendement, s\u00e9lectivit\u00e9, etc). Cependant le confinement du milieu op\u00e9ratoire implique g\u00e9n\u00e9ralement un \u00e9coulement laminaire dans celui-ci, ce qui peut provoquer des probl\u00e8mes de m\u00e9lange tout en favorisant l&#8217;encrassement et les bouchons<\/p>","protected":false},"author":1,"featured_media":961,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,21],"tags":[6974,6973,6972,6975,6976],"class_list":["post-27652","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-documents","category-memoires-theses","tag-colorimetry","tag-milli-channel","tag-milli-reacteurs","tag-mixing","tag-ultrasound"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.9 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Intensification des ph\u00e9nom\u00e8nes de transfert via ultrasons dans les milli-r\u00e9acteurs continus - GRETh<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/greth.fr\/en\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Intensification des ph\u00e9nom\u00e8nes de transfert via ultrasons dans les milli-r\u00e9acteurs continus\" \/>\n<meta property=\"og:description\" content=\"R\u00e9sum\u00e9 : La miniaturisation consiste \u00e0 r\u00e9aliser dans des dispositifs de taille microm\u00e9trique ou millim\u00e9trique des op\u00e9rations qui ont lieu habituellement dans des dispositifs de taille centim\u00e9trique ou m\u00e9trique. L&#039;int\u00e9r\u00eat de cette pratique est d&#039;augmenter le ratio surface\/volume dans le but d&#039;intensifier les ph\u00e9nom\u00e8nes de transfert (massique et thermique). Cela permet d&#039;accro\u00eetre d&#039;avantage le contr\u00f4le des conditions op\u00e9ratoires (pression, temp\u00e9rature, etc) et d&#039;am\u00e9liorer les performances de l&#039;op\u00e9ration (rendement, s\u00e9lectivit\u00e9, etc). Cependant le confinement du milieu op\u00e9ratoire implique g\u00e9n\u00e9ralement un \u00e9coulement laminaire dans celui-ci, ce qui peut provoquer des probl\u00e8mes de m\u00e9lange tout en favorisant l&#039;encrassement et les bouchons\" \/>\n<meta property=\"og:url\" content=\"https:\/\/greth.fr\/en\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\/\" \/>\n<meta property=\"og:site_name\" content=\"GRETh\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/grethfr\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/grethfr\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-05-19T08:30:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-19T09:10:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/greth.fr\/wp-content\/uploads\/2015\/08\/theses-5.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"424\" \/>\n\t<meta property=\"og:image:height\" content=\"283\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"GRETh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@grethfr\" \/>\n<meta name=\"twitter:site\" content=\"@grethfr\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"GRETh\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/greth.fr\\\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/greth.fr\\\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\\\/\"},\"author\":{\"name\":\"GRETh\",\"@id\":\"https:\\\/\\\/greth.fr\\\/#\\\/schema\\\/person\\\/6e173032c4ce46c14339ff999b721f00\"},\"headline\":\"Intensification des ph\u00e9nom\u00e8nes de transfert via ultrasons dans les milli-r\u00e9acteurs continus\",\"datePublished\":\"2026-05-19T08:30:00+00:00\",\"dateModified\":\"2026-05-19T09:10:29+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/greth.fr\\\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\\\/\"},\"wordCount\":1161,\"publisher\":{\"@id\":\"https:\\\/\\\/greth.fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/greth.fr\\\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/greth.fr\\\/wp-content\\\/uploads\\\/2015\\\/08\\\/theses-5.jpg\",\"keywords\":[\"Colorimetry\",\"Milli-Channel\",\"Milli-r\u00e9acteurs\",\"Mixing\",\"Ultrasound\"],\"articleSection\":[\"Documents\",\"M\u00e9moires de th\u00e8ses\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/greth.fr\\\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\\\/\",\"url\":\"https:\\\/\\\/greth.fr\\\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\\\/\",\"name\":\"Intensification des ph\u00e9nom\u00e8nes de transfert via ultrasons dans les milli-r\u00e9acteurs continus - 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GRETh","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/greth.fr\/en\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\/","og_locale":"en_US","og_type":"article","og_title":"Intensification des ph\u00e9nom\u00e8nes de transfert via ultrasons dans les milli-r\u00e9acteurs continus","og_description":"R\u00e9sum\u00e9 : La miniaturisation consiste \u00e0 r\u00e9aliser dans des dispositifs de taille microm\u00e9trique ou millim\u00e9trique des op\u00e9rations qui ont lieu habituellement dans des dispositifs de taille centim\u00e9trique ou m\u00e9trique. L'int\u00e9r\u00eat de cette pratique est d'augmenter le ratio surface\/volume dans le but d'intensifier les ph\u00e9nom\u00e8nes de transfert (massique et thermique). Cela permet d'accro\u00eetre d'avantage le contr\u00f4le des conditions op\u00e9ratoires (pression, temp\u00e9rature, etc) et d'am\u00e9liorer les performances de l'op\u00e9ration (rendement, s\u00e9lectivit\u00e9, etc). Cependant le confinement du milieu op\u00e9ratoire implique g\u00e9n\u00e9ralement un \u00e9coulement laminaire dans celui-ci, ce qui peut provoquer des probl\u00e8mes de m\u00e9lange tout en favorisant l'encrassement et les bouchons","og_url":"https:\/\/greth.fr\/en\/intensification-des-phenomenes-de-transfert-via-ultrasons-dans-les-milli-reacteurs-continus\/","og_site_name":"GRETh","article_publisher":"https:\/\/www.facebook.com\/grethfr\/","article_author":"https:\/\/www.facebook.com\/grethfr\/","article_published_time":"2026-05-19T08:30:00+00:00","article_modified_time":"2026-05-19T09:10:29+00:00","og_image":[{"width":424,"height":283,"url":"https:\/\/greth.fr\/wp-content\/uploads\/2015\/08\/theses-5.jpg","type":"image\/jpeg"}],"author":"GRETh","twitter_card":"summary_large_image","twitter_creator":"@grethfr","twitter_site":"@grethfr","twitter_misc":{"Written by":"GRETh","Est. reading time":"1 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