1.0CHARRON Yveshttps://yvcharron.comadmin7014https://yvcharron.com/index.php/author/admin7014/rich600338<blockquote class="wp-embedded-content" data-secret="Nn6q3tx7b5"><a href="https://yvcharron.com/index.php/structured-surfaces-2/">Structured surfaces – From two to three dimensions</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://yvcharron.com/index.php/structured-surfaces-2/embed/#?secret=Nn6q3tx7b5" width="600" height="338" title="“Structured surfaces – From two to three dimensions” — CHARRON Yves" data-secret="Nn6q3tx7b5" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://yvcharron.com/wp-includes/js/wp-embed.min.js /* ]]> */ </script> Keywords: Structured surfaces Two-dimension 2D 3D flow drag reduction turbulence low speed streaks grooves This section includes three parts: _ Two_dimension structures or 2D longitudinal grooves These structures include only ONE flow drag reduction mechanism. They are also called riblets. They are longitudinal with constant shape and dimension in the MAIN flow direction http://yvcharron.com/index.php/two-dimension-structures/_ _… Read morehttp://yvcharron.com/wp-content/uploads/2020/12/shark-skin-surfaces-for-fluid-drag-reduction_rsta20100201f04.jpg