{"id":160169,"date":"2022-09-26T10:00:48","date_gmt":"2022-09-26T10:00:48","guid":{"rendered":"\/knowledge\/forums\/topic\/discovery-aim-tutorial-fluid-flow-over-a-bluff-body\/"},"modified":"2023-08-16T06:33:38","modified_gmt":"2023-08-16T06:33:38","slug":"discovery-aim-tutorial-fluid-flow-over-a-bluff-body","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/discovery-aim-tutorial-fluid-flow-over-a-bluff-body\/","title":{"rendered":"Discovery AIM tutorial &#8211; Fluid Flow over a Bluff Body"},"content":{"rendered":"<p><strong>This<\/strong><strong>\u00a0example is taken from\u00a0<u><a href=\"https:\/\/confluence.cornell.edu\/display\/SIMULATION\/ANSYS+AIM+-+Fluid+Flow+over+a+Bluff+Body\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Cornell University&#8217;s ANSYS AIM Learning Modules<\/a><\/u><\/strong><\/p>\n<hr \/>\n<nav class=\"toc -selected\">Contents<\/p>\n<ol class=\"toc__section -lev0\">\n<li>\n<ol class=\"toc__section -lev1\">\n<li class=\"toc__item -lev1\">Problem Specification<\/li>\n<li class=\"toc__item -lev1\">Geometry<\/li>\n<li class=\"toc__item -lev1\">Mesh<\/li>\n<li class=\"toc__item -lev1\">Physics Setup<\/li>\n<li class=\"toc__item -lev1\">Results Evaluation<\/li>\n<li class=\"toc__item -lev1\">Verification &amp; Validation<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/nav>\n<h4 content_id=\"problem-specification\" class=\"toc__permalink\" content_id=\"problem-specification\" class=\"toc__permalink\"  id=\"PROBLEM-SPECIFICATION\">Problem Specification<\/h4>\n<p>Simulate fluid flow over a triangular bluff body under isothermal flow conditions. The following image specifies the problem geometry, while the inlet velocity is 17.3 m\/s.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-157325\" src=\"\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/08\/hg211-1.png\" alt=\" width=\" height=\"300\" \/><\/p>\n<hr \/>\n<h4 content_id=\"geometry\" class=\"toc__permalink\" content_id=\"geometry\" class=\"toc__permalink\"  id=\"GEOMETRY\">Geometry<\/h4>\n<p><a style=\"color: #1e6ddc; font-weight: bold; text-decoration: none;\" href=\"https:\/\/ansys13.ansys.com\/KnowledgeArticles\/Discovery\/FlameHolderSV.zip\" download=\"\">Download the file here<\/a><\/p>\n<p>In this video, you will learn how to import the geometry in Discovery AIM.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"https:\/\/play.vidyard.com\/5uXNgvgtGEJfMjqiNxBvPq.html?v=3.1.1&amp;\" width=\"640\" height=\"360\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n<hr \/>\n<h4 content_id=\"mesh\" class=\"toc__permalink\" content_id=\"mesh\" class=\"toc__permalink\"  id=\"MESH\">Mesh<\/h4>\n<p>In this video, you will learn how to generate mesh in the computational fluid domain.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"https:\/\/play.vidyard.com\/CCGgsmXgfqdtpa6zkamRxT.html?v=3.1.1&amp;\" width=\"640\" height=\"360\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n<hr \/>\n<h4 content_id=\"physics-setup\" class=\"toc__permalink\" content_id=\"physics-setup\" class=\"toc__permalink\"  id=\"PHYSICS-SETUP\">Physics Setup<\/h4>\n<p>In this video, you will learn how to edit material properties and specify fluid flow conditions.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"https:\/\/play.vidyard.com\/PFGEkBwwywC9RUmVdDo72X.html?v=3.1.1&amp;\" width=\"640\" height=\"360\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n<hr \/>\n<h4 content_id=\"results-evaluation\" class=\"toc__permalink\" content_id=\"results-evaluation\" class=\"toc__permalink\"  id=\"RESULTS-EVALUATION\">Results Evaluation<\/h4>\n<p>In this video, you will learn how to evaluate velocity vectors and velocity contour in the flow domain.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"https:\/\/play.vidyard.com\/B1kTsTtuYyfJwwzu4yp4sX.html?v=3.1.1&amp;\" width=\"640\" height=\"360\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n<hr \/>\n<h4 content_id=\"verification-amp-validation\" class=\"toc__permalink\" content_id=\"verification-amp-validation\" class=\"toc__permalink\"  id=\"VERIFICATION-VALIDATION\">Verification &amp; Validation<\/h4>\n<p>In order to validate the results from the tutorial, they must be compared to a source of credibility. The results will be compared to those found in \u201cVolvo Bluff-Body Stabilized Flame.\u201d by Dong, Yunqing, Christian L\u00fcbon, and Thomas Frank of ANSYS, which include experimental results. Below is the velocity profile on the centerline downstream of the triangular flame holder. It shows that, immediately after the body, the velocity is about half of the inlet velocity, momentarily zero and then slowly increases until it has just about reached the inlet velocity.<\/p>\n<p>In order to find data within the AIM simulation that will support this, a velocity contour will be created with a plane that bisects the flow volume horizontally. This velocity contour can already be seen in the results video. The contour will look like the image below.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-157326\" src=\"\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/08\/hg212-1.png\" alt=\" width=\" height=\"635\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-160413\" src=\"\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-300x165.png\" alt=\"\" width=\"300\" height=\"165\" srcset=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-300x165.png 300w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-1024x562.png 1024w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-768x421.png 768w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-50x27.png 50w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-100x55.png 100w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-24x13.png 24w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-36x20.png 36w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213-48x26.png 48w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/hg213.png 1130w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>After analyzing the picture above, it can be confirmed that the velocity directly downstream of the flameholder it is about half of the original inlet velocity, momentarily zero, and then slowly increases back to the inlet velocity.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>References<\/strong><\/p>\n<p>Dong, Yunqing, Christian L\u00fcbon, and Thomas Frank. &#8220;Volvo Bluff-Body Stabilized Flame &#8211; Part 1: Non-reacting Flow Investigations with AIM Fluids 16.2.&#8221; ANSYS EKM Server. ANSYS, 2 July 2015. Web. 17 July 2017.<\/p>\n","protected":false},"template":"","class_list":["post-160169","topic","type-topic","status-publish","hentry","topic-tag-aim-tutorial","topic-tag-discovery-aim","topic-tag-fluids"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["09-13-2022  20:20:17"],"_bbp_forum_id":["159552"],"_btv_view_count":["1431"],"_edit_lock":["1665575268:77457"],"_edit_last":["77457"],"_bbp_topic_id":["160169"],"_yoast_wpseo_content_score":["60"],"_yoast_wpseo_estimated-reading-time-minutes":["3"],"_yoast_wpseo_wordproof_timestamp":[""],"family":[""],"application_name":[""],"product_version":[""],"_bbp_likes_count":["1"]},"test":"solution"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/160169","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/160169\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=160169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}