{"id":150,"date":"2021-04-14T14:00:00","date_gmt":"2021-04-14T12:00:00","guid":{"rendered":"http:\/\/samuserensemble.fr\/?p=150"},"modified":"2021-05-24T19:46:44","modified_gmt":"2021-05-24T17:46:44","slug":"le-fluide-non-newtonien","status":"publish","type":"post","link":"http:\/\/samuserensemble.fr\/?p=150","title":{"rendered":"Le fluide non newtonien"},"content":{"rendered":"\n<p>Voici une exp\u00e9rience que nous refaisons r\u00e9guli\u00e8rement, tant elle est d\u00e9routante et int\u00e9ressante d&rsquo;un point de vue sensoriel : le fluide non newtonien.<\/p>\n\n\n\n<p>Il ne vous faut que 2 ingr\u00e9dients : de la f\u00e9cule de ma\u00efs et de l&rsquo;eau.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"2560\" height=\"1920\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-1-scaled.jpg\" alt=\"\" class=\"wp-image-3513\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-1-scaled.jpg 2560w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-1-300x225.jpg 300w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Versez de la f\u00e9cule dans un bol \/ saladier et ajoutez de l&rsquo;eau peu \u00e0 peu (environ 2\/3 de f\u00e9cule pour 1\/3 d&rsquo;eau, mais il faut t\u00e2tonner un peu). Vous cherchez \u00e0 obtenir une p\u00e2te assez fluide.<\/p>\n\n\n\n<p>A priori, nous avons un liquide : il coule entre nos doigts.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"2560\" height=\"1920\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/03-Rodolphe-Maizena-4-scaled.jpg\" alt=\"Fluide non newtonien\" class=\"wp-image-3544\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/03-Rodolphe-Maizena-4-scaled.jpg 2560w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/03-Rodolphe-Maizena-4-300x225.jpg 300w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Pourtant, si on serre la mati\u00e8re dans nos mains, nous sentons quelque chose de solide.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"2560\" height=\"1920\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-5-scaled.jpg\" alt=\"\" class=\"wp-image-3515\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-5-scaled.jpg 2560w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-5-300x225.jpg 300w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>De m\u00eame, si nous frappons la surface blanche du bout des doigts, nous nous heurtons \u00e0 un solide.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"2560\" height=\"1920\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-13-scaled.jpg\" alt=\"Fluide non newtonien\" class=\"wp-image-3519\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-13-scaled.jpg 2560w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-13-300x225.jpg 300w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Et si nous y allons au marteau, la r\u00e9sistance est tr\u00e8s\u00a0 nette&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"2560\" height=\"1920\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-9-scaled.jpg\" alt=\"Fluide non newtonien\" class=\"wp-image-3516\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-9-scaled.jpg 2560w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-9-300x225.jpg 300w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Mais si nous y faisons entrer nos doigts doucement, ils entrent dans un liquide !<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"2560\" height=\"1920\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-12-scaled.jpg\" alt=\"Fluide non newtonien\" class=\"wp-image-3518\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-12-scaled.jpg 2560w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-12-300x225.jpg 300w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Cette p\u00e2te est vraiment surprenante. Elle est dite non newtonienne car, contrairement \u00e0 ce qui se passe d&rsquo;ordinaire, sa viscosit\u00e9 change en fonction de la force qu&rsquo;on y applique (la viscosit\u00e9 d&rsquo;un fluide newtonien ne d\u00e9pend donc pas d&rsquo;une contrainte). Le miel a parfois une consistance de ce type. Cela peut aussi \u00e9voquer le sable en bord de plage ou&#8230; les sables mouvants !<\/p>\n\n\n\n<p>Pas de panique, c&rsquo;est une exp\u00e9rience plut\u00f4t salissante, mais \u00e7a se nettoie facilement. La p\u00e2te s\u00e8che tr\u00e8s vite et est alors facile \u00e0 d\u00e9coller des surfaces. Par contre, attention, il est d\u00e9conseill\u00e9 de la verser dans l&rsquo;\u00e9vier apr\u00e8s usage, pour \u00e9viter que des d\u00e9p\u00f4ts solides ne se forment et bouchent les canalisations.<\/p>\n\n\n\n<p>Quelques vid\u00e9os pour aller plus loin :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Les essais d&rsquo;Experiment Boy, notamment avec les basses fr\u00e9quences :<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-prise-en-charge-des-contenus-embarques wp-block-embed-prise-en-charge-des-contenus-embarques wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"jetpack-video-wrapper\"><iframe title=\"Liquide ou Solide ?! - Fluide Non-Newtonien ! [Science 2.0]\" width=\"850\" height=\"478\" src=\"https:\/\/www.youtube.com\/embed\/LkAJo2d0jqQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li>Les m\u00eames ph\u00e9nom\u00e8nes, mais au ralenti, afin de bien voir ce qui se passe entre l&rsquo;\u00e9tat liquide et l&rsquo;\u00e9tat solide :<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-prise-en-charge-des-contenus-embarques wp-block-embed-prise-en-charge-des-contenus-embarques wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"jetpack-video-wrapper\"><iframe title=\"Non-Newtonian Liquid IN SLOW MOTION!\" width=\"850\" height=\"478\" src=\"https:\/\/www.youtube.com\/embed\/G1Op_1yG6lQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li>Ici, on peut voir ce que \u00e7a donne \u00e0 grande \u00e9chelle&#8230; et oui, j&rsquo;ai des demandes de piscines d&rsquo;oobleck, ici ! Qui n&rsquo;a pas envie de tester le fait de marcher sur l&rsquo;eau ?<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-prise-en-charge-des-contenus-embarques wp-block-embed-prise-en-charge-des-contenus-embarques wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"jetpack-video-wrapper\"><iframe title=\"Fun with Non-Newtonian Fluid - Lamar University\" width=\"850\" height=\"478\" src=\"https:\/\/www.youtube.com\/embed\/RIUEZ3AhrVE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li>Les m\u00eames explications, mais en anglais&#8230; histoire de faire un peu d&rsquo;anglais !<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-prise-en-charge-des-contenus-embarques wp-block-embed-prise-en-charge-des-contenus-embarques wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"jetpack-video-wrapper\"><iframe title=\"Oobleck and Non-Newtonian Fluids: Crash Course Kids #46.1\" width=\"850\" height=\"478\" src=\"https:\/\/www.youtube.com\/embed\/Fnd-2jetT1w?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Voici une exp\u00e9rience que nous refaisons r\u00e9guli\u00e8rement, tant elle est d\u00e9routante et int\u00e9ressante d&rsquo;un point de vue sensoriel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3514,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[699],"tags":[35,731,125,226,558,590,660],"class_list":["post-150","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apprendre-en-samusant","tag-apprendre-en-samusant","tag-article-demenage","tag-chimie","tag-experience","tag-recette","tag-sciences","tag-video"],"aioseo_notices":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/05\/Oobleck-6-scaled.jpg","_links":{"self":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts\/150","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=150"}],"version-history":[{"count":2,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts\/150\/revisions"}],"predecessor-version":[{"id":3545,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts\/150\/revisions\/3545"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/media\/3514"}],"wp:attachment":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=150"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}