{"id":78069,"date":"2026-05-04T09:47:11","date_gmt":"2026-05-04T07:47:11","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=78069"},"modified":"2026-05-18T09:45:53","modified_gmt":"2026-05-18T07:45:53","slug":"valse-gravitationnelle-sur-un-film-de-savon","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/valse-gravitationnelle-sur-un-film-de-savon.html","title":{"rendered":"Valse gravitationnelle sur un film de savon"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-sx3vs0-44b2a8ab14b4051c54bfc3098d7228b7\">\n.flex_column.av-sx3vs0-44b2a8ab14b4051c54bfc3098d7228b7{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-sx3vs0-44b2a8ab14b4051c54bfc3098d7228b7 av_one_full  avia-builder-el-0  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-lq2h9d9t-cc8fde46f6e45211a1b6d6c476b8c108'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div id=\"attachment_78071\" style=\"width: 1210px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-78071\" class=\"wp-image-78071 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2.png\" alt=\"\" width=\"1200\" height=\"230\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2.png 1200w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2-300x58.png 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2-1030x197.png 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2-768x147.png 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2-18x3.png 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image2-705x135.png 705w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><p id=\"caption-attachment-78071\" class=\"wp-caption-text\">Vue du dessous d\u2019un film de savon horizontal d\u00e9form\u00e9 par une goutte d\u00e9pos\u00e9e au centre du film.<\/p><\/div>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-moqw71wu-412c7932345a7f4c53bf67a0cf8e33cb\">\n#top .hr.hr-invisible.av-moqw71wu-412c7932345a7f4c53bf67a0cf8e33cb{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-moqw71wu-412c7932345a7f4c53bf67a0cf8e33cb hr-invisible  avia-builder-el-2  el_after_av_textblock  el_before_av_hr'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='hr av-j7znhx-e3ee2d6f36b10bddf7d0ddaff94411ca hr-default  avia-builder-el-3  el_after_av_hr  el_before_av_textblock'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-lq2gsmqj-6f79b7b0b0e14a78be1a6c67ea7c7132'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1 style=\"text-align: center;\"><strong><span style=\"color: #99ccff;\">Valse gravitationnelle sur un film de savon<\/span><\/strong><\/h1>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-15dykqo-d9aa9d5723e5b35a36b3d8a512458f8f\">\n@keyframes av_boxShadowEffect_av-15dykqo-d9aa9d5723e5b35a36b3d8a512458f8f-column {\n0%   { box-shadow:  0 0 0 0 #d1d1d1; opacity: 1; }\n100% { box-shadow:  0 0 10px 0 #d1d1d1; opacity: 1; }\n}\n.flex_column.av-15dykqo-d9aa9d5723e5b35a36b3d8a512458f8f{\nbox-shadow: 0 0 10px 0 #d1d1d1;\nborder-width:4px;\nborder-style:solid;\nborder-radius:10px 10px 10px 10px;\npadding:20px 20px 20px 20px;\nbackground-color:#ededed;\n}\n<\/style>\n<div  class='flex_column av-15dykqo-d9aa9d5723e5b35a36b3d8a512458f8f av_one_half  avia-builder-el-5  el_after_av_one_full  el_before_av_two_fifth  first flex_column_div shadow-not-animated  column-top-margin'     ><section  class='av_textblock_section av-lq2hhk08-de2267eda297e5e01beeb815d5568d08'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h5><\/h5>\n<h4><\/h4>\n<div id=\"attachment_78073\" style=\"width: 253px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-78073\" class=\"wp-image-78073\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1.png\" alt=\"\" width=\"243\" height=\"236\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1.png 800w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1-300x292.png 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1-768x748.png 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1-12x12.png 12w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1-36x36.png 36w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image1-705x686.png 705w\" sizes=\"auto, (max-width: 243px) 100vw, 243px\" \/><\/a><p id=\"caption-attachment-78073\" class=\"wp-caption-text\">Deux lentilles liquides en orbite sur un film de savon. Les lentilles d\u00e9forment l\u2019image du fond situ\u00e9 sous le film.<\/p><\/div>\n<h5>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-qawvnx-7a74d8bc7bca7214f06a484a64543370\">\n.av_font_icon.av-qawvnx-7a74d8bc7bca7214f06a484a64543370{\ncolor:#99ccff;\nborder-color:#99ccff;\n}\n.av_font_icon.av-qawvnx-7a74d8bc7bca7214f06a484a64543370 .av-icon-char{\nfont-size:20px;\nline-height:20px;\n}\n<\/style>\n<span  class='av_font_icon av-qawvnx-7a74d8bc7bca7214f06a484a64543370 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue881' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/h5>\n<p style=\"text-align: left;\">Les interactions gravitationnelles fa\u00e7onnent les structures de l\u2019Univers, des orbites des plan\u00e8tes aux interactions entre les galaxies. Elles g\u00e9n\u00e8rent des dynamiques caract\u00e9ristiques telles que des orbites complexes, des bras spiraux de mar\u00e9e ou des ponts, courantes aux \u00e9chelles astrophysiques mais rarement observ\u00e9es \u00e0 l\u2019\u00e9chelle humaine. R\u00e9cemment, des \u00e9quipes de l\u2019IEMN et de l\u2019Institut Pprime ont observ\u00e9 l\u2019apparition de telles dynamiques lorsque deux gouttes miscibles, d\u00e9pos\u00e9es sur un film de savon, orbitent, entrent en collision et fusionnent.<\/p>\n<p style=\"text-align: left;\">Exp\u00e9rimentalement, un film de savon horizontal, constitu\u00e9 d\u2019un m\u00e9lange d\u2019eau, de glyc\u00e9rol et de tensioactif, est form\u00e9 sur un support horizontal. Ensuite, une ou plusieurs gouttes sont d\u00e9pos\u00e9es sur ce film de savon et forment des structures stables appel\u00e9es \u00ab lentilles \u00bb, dont la forme r\u00e9sulte d\u2019un \u00e9quilibre entre les forces capillaires et gravitationnelles. Lorsque plusieurs gouttes sont introduites sur le film avec une vitesse horizontale initiale (via un tobogoutte), celles-ci se mettent \u00e0 orbiter, puis finissent par entrer en collision et fusionner, dans une chor\u00e9graphie rappelant la fusion de galaxies.<\/p>\n<p style=\"text-align: left;\">L\u2019observation de telles dynamiques est rendue possible par (i) la formation de lentilles stables lorsque des gouttes sont d\u00e9pos\u00e9es sur le film de savon, (ii) des interactions \u00e0 longue port\u00e9e entre ces lentilles, analogues \u00e0 des forces d\u2019attraction gravitationnelle bidimensionnelles, et (iii) la nature d\u00e9formable de ces lentilles lorsqu\u2019elles interagissent. L\u2019\u00e9quipe de l\u2019IEMN a mod\u00e9lis\u00e9 les interactions entre lentilles en orbite et d\u00e9montr\u00e9 que celles-ci proviennent de la d\u00e9formation du film, r\u00e9sultant d\u2019un \u00e9quilibre entre les forces capillaires et gravitationnelles. Elle a pu quantifier cette force et reproduire des orbites complexes de deux lentilles poss\u00e9dant une vitesse initiale. La prochaine \u00e9tape consistera \u00e0 \u00e9tudier et mod\u00e9liser la collision et la fusion des lentilles.<\/p>\n<p style=\"text-align: left;\">Ce travail ouvre des perspectives pour de nouveaux analogues gravitationnels permettant d\u2019investiguer, \u00e0 des \u00e9chelles humaines, des repr\u00e9sentations simplifi\u00e9es de ph\u00e9nom\u00e8nes se produisant habituellement \u00e0 des \u00e9chelles hors de port\u00e9e de l\u2019observation humaine.<\/p>\n<hr \/>\n<h5>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-qawvnx-1-f30b193258b55e359feb7fd33411f334\">\n.av_font_icon.av-qawvnx-1-f30b193258b55e359feb7fd33411f334{\ncolor:#99ccff;\nborder-color:#99ccff;\n}\n.av_font_icon.av-qawvnx-1-f30b193258b55e359feb7fd33411f334 .av-icon-char{\nfont-size:20px;\nline-height:20px;\n}\n<\/style>\n<span  class='av_font_icon av-qawvnx-1-f30b193258b55e359feb7fd33411f334 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue881' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/h5>\n<p>Ce travail publi\u00e9 dans PNAS NEXUS <span style=\"color: #333399;\">(<a style=\"color: #333399;\" href=\"https:\/\/doi.org\/10.1093\/pnasnexus\/pgag079\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1093\/pnasnexus\/pgag079<\/a>)<\/span> a \u00e9t\u00e9 mis en avant dans un article du journal Le Monde :<\/p>\n<p><a href=\"https:\/\/www.lemonde.fr\/sciences\/article\/2026\/04\/16\/quand-des-gouttes-sur-un-film-de-savon-permettent-de-comprendre-la-formation-des-galaxies_6680461_1650684.html\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #333399;\">Article du Monde<\/span><\/a><\/p>\n<p><strong><span style=\"color: #f16728;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-11665d57be50482f466d54b8a3268ec6\">\n.av_font_icon.av-mqde7m-11665d57be50482f466d54b8a3268ec6{\ncolor:#f16728;\nborder-color:#f16728;\n}\n.av_font_icon.av-mqde7m-11665d57be50482f466d54b8a3268ec6 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-11665d57be50482f466d54b8a3268ec6 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span>mickael.baudoin<img loading=\"lazy\" decoding=\"async\" class=\"align=absbottom wp-image-73335 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6.png\" alt=\"\" width=\"16\" height=\"14\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6.png 16w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6-14x12.png 14w\" sizes=\"auto, (max-width: 16px) 100vw, 16px\" \/>iemn.fr\u00a0<\/strong><\/p>\n<p style=\"text-align: left;\"><strong>\u00a0<\/strong><\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2cesnp-c72d05c24232caf1606302d0bb47819d\">\n@keyframes av_boxShadowEffect_av-2cesnp-c72d05c24232caf1606302d0bb47819d-column {\n0%   { box-shadow:  0 0 0 0 #e5e5e5; opacity: 1; }\n100% { box-shadow:  0 0 10px 0 #e5e5e5; opacity: 1; }\n}\n.flex_column.av-2cesnp-c72d05c24232caf1606302d0bb47819d{\nbox-shadow: 0 0 10px 0 #e5e5e5;\nborder-radius:10px 10px 10px 10px;\npadding:15px 15px 15px 15px;\nbackground-color:rgba(190,209,232,0.43);\n}\n.flex_column.av-2cesnp-c72d05c24232caf1606302d0bb47819d .avia-divider-svg-top{\nborder-radius:10px 10px 0 0;\n}\n.flex_column.av-2cesnp-c72d05c24232caf1606302d0bb47819d .avia-divider-svg-top svg{\nheight:50px;\nwidth:calc(100% + 1.3px);\nfill:#bcbcbc;\n}\n<\/style>\n<div  class='flex_column av-2cesnp-c72d05c24232caf1606302d0bb47819d av_two_fifth  avia-builder-el-10  el_after_av_one_half  el_before_av_hr  flex_column_div shadow-not-animated  column-top-margin'     ><div class='avia-divider-svg avia-divider-svg-triangle-asymmetrical avia-divider-svg-top avia-svg-original'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 1000 100\" preserveaspectratio=\"none\">\n\t<path d=\"M738,99l262-93V0H0v5.6L738,99z\"\/>\n<\/svg><\/div><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-moqwfgjw-e1e72b6a196e06b76a3b45bd709e14b9\">\n#top .hr.hr-invisible.av-moqwfgjw-e1e72b6a196e06b76a3b45bd709e14b9{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-moqwfgjw-e1e72b6a196e06b76a3b45bd709e14b9 hr-invisible  avia-builder-el-11  el_before_av_textblock  avia-builder-el-first'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-moqw0594-193a3b2360a3a1af632697c7868a8687'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div id=\"attachment_78075\" style=\"width: 376px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image3.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-78075\" class=\"wp-image-78075 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image3.png\" alt=\"\" width=\"366\" height=\"359\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image3.png 366w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image3-300x294.png 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image3-12x12.png 12w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/05\/Image3-36x36.png 36w\" sizes=\"auto, (max-width: 366px) 100vw, 366px\" \/><\/a><p id=\"caption-attachment-78075\" class=\"wp-caption-text\">Dynamique de deux gouttes orbitant sur un film de savon. Les points correspondent aux positions des centres de gravit\u00e9 des deux lentilles en fonction du temps, tandis que les segments relient, \u00e0 chaque instant, les centres de gravit\u00e9 des deux lentilles.<\/p><\/div>\n<hr \/>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lq3rrbn6-b2fad551015528b25fb537190ccf1056\">\n#top .hr.hr-invisible.av-lq3rrbn6-b2fad551015528b25fb537190ccf1056{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-lq3rrbn6-b2fad551015528b25fb537190ccf1056 hr-invisible  avia-builder-el-13  el_after_av_two_fifth  el_before_av_four_fifth'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-moqxvoph-864c8f470c57613ef07da986f7f062f9\">\n.flex_column.av-moqxvoph-864c8f470c57613ef07da986f7f062f9{\nborder-width:1px;\nborder-color:#e5e5e5;\nborder-style:solid;\nborder-radius:20px 20px 20px 20px;\npadding:15px 15px 15px 15px;\nbackground-color:rgba(123,176,231,0.47);\n}\n<\/style>\n<div  class='flex_column av-moqxvoph-864c8f470c57613ef07da986f7f062f9 av_four_fifth  avia-builder-el-14  el_after_av_hr  avia-builder-el-last  first flex_column_div'     ><section  class='av_textblock_section av-lq3ru9ya-29405bed54ddc2f1034afe84a9bb7978'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>R\u00e9f\u00e9rence\u00a0:<\/p>\n<p>[1] J.P. Martischang, B. Reichert, I. Haouche, G. Rousseaux, A. Duchesne &amp; M. Baudoin, PNAS Nexus, 5, pgag079 (2026)<\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-78069","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/78069","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=78069"}],"version-history":[{"count":26,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/78069\/revisions"}],"predecessor-version":[{"id":78278,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/78069\/revisions\/78278"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=78069"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=78069"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=78069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}