{"id":41331,"date":"2024-07-18T10:30:48","date_gmt":"2024-07-18T08:30:48","guid":{"rendered":"https:\/\/www.linseis.com\/resistance-thermique-de-contact\/"},"modified":"2025-08-07T07:42:42","modified_gmt":"2025-08-07T05:42:42","slug":"resistance-thermique-de-contact","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/fr\/connaissance\/resistance-thermique-de-contact\/","title":{"rendered":"R\u00e9sistance thermique de contact"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"41331\" class=\"elementor elementor-41331 elementor-12205\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9eb8745 e-flex e-con-boxed elementor-invisible e-con e-parent\" data-id=\"9eb8745\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInUp&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f7a7fd5 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"f7a7fd5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;Aucun titre n\\u2019a \\u00e9t\\u00e9 trouv\\u00e9 sur cette page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable des mati\u00e8res\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__f7a7fd5\" aria-expanded=\"true\" aria-label=\"Ouvrir la table des mati\u00e8res\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__f7a7fd5\" aria-expanded=\"true\" aria-label=\"Fermer la table des mati\u00e8res\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__f7a7fd5\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a9139e elementor-widget elementor-widget-heading\" data-id=\"8a9139e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Quelle est la r\u00e9sistance thermique de contact ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffaef65 elementor-widget elementor-widget-text-editor\" data-id=\"ffaef65\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>La r\u00e9sistance thermique de contact caract\u00e9rise le transfert de chaleur \u00e0 l&rsquo;interface entre deux solides.<\/strong><\/p>\n<p>En raison des processus de fabrication et d&rsquo;usinage, mais aussi des propri\u00e9t\u00e9s intrins\u00e8ques du mat\u00e9riau, la rugosit\u00e9 de la surface est in\u00e9vitable.\nPar cons\u00e9quent, ce n&rsquo;est pas la totalit\u00e9 de la surface des deux solides qui est en contact direct, mais seulement une fraction, qui n&rsquo;est donc pas impliqu\u00e9e dans le transport de la chaleur. <\/p>\n<p>Les vides qui en r\u00e9sultent entre les solides sont g\u00e9n\u00e9ralement remplis d&rsquo;air, un mauvais conducteur de chaleur.[1,2]  Il en r\u00e9sulte un saut de temp\u00e9rature \u00e0 l&rsquo;interface.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af839e4 elementor-widget elementor-widget-spacer\" data-id=\"af839e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09679bd elementor-widget elementor-widget-spacer\" data-id=\"09679bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9230b23 elementor-widget elementor-widget-text-editor\" data-id=\"9230b23\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>La r\u00e9sistance thermique sp\u00e9cifique de contact est la suivante :[1]<\/strong><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fbbe2e elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"5fbbe2e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"208\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Thermischer-Kontaktwiderstand-1-300x208-1.png\" class=\"attachment-large size-large wp-image-12226\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">avec rK : r\u00e9sistance thermique sp\u00e9cifique de contact en (m2K)\/W A : surface de contact nominale (macroscopique) sans rugosit\u00e9 en m2 Q \u0307 : Flux de chaleur \u00e0 travers la surface de contact A en W \u0394T : Saut de temp\u00e9rature \u00e0 la surface de contact A en K.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-276a413 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"276a413\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Sa valeur r\u00e9ciproque est \u00e9galement appel\u00e9e<strong> coefficient de contact thermique<\/strong>.\nLe quotient de la r\u00e9sistance de contact thermique sp\u00e9cifique rk et de la surface de contact macroscopique A est appel\u00e9 r\u00e9sistance de contact thermique : <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aac13d1 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"aac13d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"236\" height=\"138\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Thermischer-Kontaktwiderstand-Formel-2.png\" class=\"attachment-large size-large wp-image-12234\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a28d3a elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"0a28d3a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L&rsquo;unit\u00e9 de r\u00e9sistance thermique de contact est le \u25a1(K\/W).<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37c41bc elementor-widget elementor-widget-heading\" data-id=\"37c41bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Qu'est-ce qui peut influencer la r\u00e9sistance thermique du contact ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-92ec287 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"92ec287\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li>Rugosit\u00e9 de surface des solides<\/li>\n<li>Pression de contact sur la surface de contact entre les deux solides<\/li>\n<li>Remplir les vides entre les surfaces de contact avec de meilleurs mat\u00e9riaux thermoconducteurs, comme par exemple :  <ul>\n<li>gels, p\u00e2tes, mat\u00e9riaux \u00e0 changement de phase, feuilles, adh\u00e9sifs, mat\u00e9riaux d&rsquo;interface thermique, etc.<\/li>\n<\/ul>\n<\/li>\n<li>En g\u00e9n\u00e9ral, la combinaison des deux solides d\u00e9termine la r\u00e9sistance thermique de contact<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29b9d76 elementor-widget elementor-widget-spacer\" data-id=\"29b9d76\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-695c08e elementor-widget elementor-widget-spacer\" data-id=\"695c08e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b5e415 elementor-widget elementor-widget-text-editor\" data-id=\"4b5e415\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Un mod\u00e8le tr\u00e8s simplifi\u00e9 de calcul de la r\u00e9sistance thermique de contact peut \u00eatre \u00e9tabli \u00e0 l&rsquo;aide d&rsquo;un mod\u00e8le de r\u00e9sistance.\nLe flux de chaleur est divis\u00e9 en composantes solides et fluides et trait\u00e9 s\u00e9par\u00e9ment.\nDans la partie solide, il y a deux r\u00e9sistances connect\u00e9es en s\u00e9rie.\nLa partie qui traverse le fluide est form\u00e9e par l&rsquo;air qui y est enferm\u00e9.\nLe transport de la chaleur s&rsquo;effectue en parall\u00e8le \u00e0 travers les deux canaux, c&rsquo;est pourquoi il peut \u00eatre repr\u00e9sent\u00e9 comme un circuit parall\u00e8le dans le sch\u00e9ma de circuit \u00e9quivalent.\n(cf. figure 1)     <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6c36de9 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"6c36de9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"327\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Modell_deutsch-1024x419-1.png\" class=\"attachment-large size-large wp-image-12256\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Modell_deutsch-1024x419-1.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Modell_deutsch-1024x419-1-300x123.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Modell_deutsch-1024x419-1-768x314.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 1 : Mod\u00e8le tr\u00e8s simplifi\u00e9 pour d\u00e9terminer la r\u00e9sistance thermique de contact [1].<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a83fb83 elementor-widget elementor-widget-text-editor\" data-id=\"a83fb83\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\u00c0 l&rsquo;aide du sch\u00e9ma du circuit \u00e9quivalent et des r\u00e8gles connues pour calculer la r\u00e9sistance en s\u00e9rie et en parall\u00e8le, on obtient la formule suivante [1] :<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-963d122 elementor-widget elementor-widget-spacer\" data-id=\"963d122\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c891b16 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"c891b16\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"60\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Thermischer-Kontaktwiderstand-Formel-3-300x60-4.png\" class=\"attachment-medium size-medium wp-image-12324\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d94d1f elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"7d94d1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>avec<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4bfc0e4 elementor-widget elementor-widget-spacer\" data-id=\"4bfc0e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-502af99 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"502af99\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"195\" height=\"90\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Thermischer-Kontaktwiderstand-Formel-4.png\" class=\"attachment-large size-large wp-image-12394\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee484c6 elementor-widget elementor-widget-spacer\" data-id=\"ee484c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b31d24c elementor-widget elementor-widget-text-editor\" data-id=\"b31d24c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>R\u00e9sistance thermique des mat\u00e9riaux 1,2 ou de l&rsquo;air en K\/W<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e98ed79 elementor-widget elementor-widget-spacer\" data-id=\"e98ed79\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d86e453 elementor-widget elementor-widget-text-editor\" data-id=\"d86e453\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Elle est valable :<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0d94bee elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"0d94bee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"56\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Thermischer-Kontaktwiderstand-Formel-5-300x56-1.png\" class=\"attachment-large size-large wp-image-12402\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">\u03b4 : \u00c9paisseur de la couche limite en m \u03bb_(1,2,Air) : Conductivit\u00e9 thermique des mat\u00e9riaux 1, 2, respectivement du mat\u00e9riau dans l'espace (g\u00e9n\u00e9ralement de l'air) en W\/(m K) A : surface de contact nominale (macroscopique) sans rugosit\u00e9 en<sup>m2<\/sup> \u03c6 : Proportion de la surface de contact solide par rapport \u00e0 la surface nominale A<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c200c6c elementor-widget elementor-widget-spacer\" data-id=\"c200c6c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bcc5ba2 elementor-widget elementor-widget-text-editor\" data-id=\"bcc5ba2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Le mod\u00e8le pr\u00e9sente quelques faiblesses.<br \/>\nPremi\u00e8rement, il ne prend pas en compte le transfert de chaleur sous forme de rayonnement et deuxi\u00e8mement, l&rsquo;\u00e9paisseur de la couche limite \u03b4 et la partie de la surface nominale qui participe au transfert de chaleur \u03c6 ne sont connues que dans les cas les plus rares. <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e9cf50 elementor-widget elementor-widget-heading\" data-id=\"6e9cf50\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comment mesurer la r\u00e9sistance thermique du contact ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f0160f7 elementor-widget elementor-widget-text-editor\" data-id=\"f0160f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>La r\u00e9sistance thermique de contact peut \u00eatre d\u00e9termin\u00e9e, par exemple, \u00e0 l&rsquo;aide d&rsquo;un <a href=\"https:\/\/www.linseis.com\/fr\/produits\/conductivite-thermique\/tim-l58\/\"><strong>\u00ab\u00a0testeur de mat\u00e9riau d&rsquo;interface thermique\u00a0\u00bb (testeur TIM)<\/strong><\/a>.<br \/>Un testeur TIM mesure l&rsquo;imp\u00e9dance thermique d&rsquo;un mat\u00e9riau pour diff\u00e9rentes \u00e9paisseurs en appliquant un flux de chaleur \u00e0 travers l&rsquo;\u00e9chantillon.<\/p><p>Une ligne droite croissante peut \u00eatre d\u00e9termin\u00e9e \u00e0 partir des points de mesure via une r\u00e9gression lin\u00e9aire, et la conductivit\u00e9 thermique peut \u00eatre d\u00e9termin\u00e9e \u00e0 partir de sa pente.<br \/>L&rsquo;ordonn\u00e9e de la droite correspond \u00e0 la r\u00e9sistance thermique de contact entre le mat\u00e9riau et le bloc de mesure.<br \/>Par exemple, la barre de mesure peut \u00eatre en laiton ou en alliage de cuivre ou d&rsquo;aluminium.<\/p><p>Un exemple d&rsquo;une telle mesure est illustr\u00e9 \u00e0 la figure 2.<br \/>Il s&rsquo;agit d&rsquo;une mesure de l&rsquo;imp\u00e9dance thermique d&rsquo;un \u00e9chantillon de VespelTM d&rsquo;une taille de 25 mm x 25 mm et d&rsquo;une pression de contact appliqu\u00e9e de 1 MPa.<br \/>Dans cet exemple, des \u00e9chantillons d&rsquo;une \u00e9paisseur comprise entre 1,1 mm et 3,08 mm ont \u00e9t\u00e9 mesur\u00e9s.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-661d207 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"661d207\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"667\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/TIM-Vespel-01-1024x667-1.png\" class=\"attachment-2048x2048 size-2048x2048 wp-image-13259\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/TIM-Vespel-01-1024x667-1.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/TIM-Vespel-01-1024x667-1-300x195.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/TIM-Vespel-01-1024x667-1-768x500.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 2 : Mesure de la conductivit\u00e9 thermique du VespelTM (\u00e0 50\u00b0C, 1MPa)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eeb9cf5 elementor-widget elementor-widget-heading\" data-id=\"eeb9cf5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Litt\u00e9rature :<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d20d592 elementor-widget elementor-widget-text-editor\" data-id=\"d20d592\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>[1] Griesinger, Andreas.\nW\u00e4rmemanagement in der Elektronik, Springer Berlin Heidelberg, 2019. <\/p>\n<p>[2] Incropera, DeWitt, Bergmann, Lavine, Fundamentals of heat and mass transfer.pdf\u00a0\u00bb, John Wiley &amp; Sons, 2017.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38d92df elementor-widget elementor-widget-spacer\" data-id=\"38d92df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>La r\u00e9sistance thermique de contact caract\u00e9rise le transfert de chaleur \u00e0 l&rsquo;interface entre deux solides.<\/p>\n","protected":false},"author":3,"featured_media":12212,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[187],"tags":[],"class_list":["post-41331","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-connaissance"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts\/41331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/comments?post=41331"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts\/41331\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/media\/12212"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/media?parent=41331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/categories?post=41331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/tags?post=41331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}