{"id":160162,"date":"2022-09-26T10:00:43","date_gmt":"2022-09-26T10:00:43","guid":{"rendered":"\/knowledge\/forums\/topic\/discovery-aim-tutorial-steady-flow-over-a-cylinder\/"},"modified":"2023-08-16T06:33:37","modified_gmt":"2023-08-16T06:33:37","slug":"discovery-aim-tutorial-steady-flow-over-a-cylinder","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/discovery-aim-tutorial-steady-flow-over-a-cylinder\/","title":{"rendered":"Discovery AIM tutorial &#8211; Steady Flow over a Cylinder"},"content":{"rendered":"<p><strong>This example is taken from\u00a0<u><a href=\"https:\/\/confluence.cornell.edu\/display\/SIMULATION\/ANSYS+AIM+-+Steady+Flow+over+a+Cylinder\" 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 class=\"toc__item -lev0\">Problem Specification<\/li>\n<li class=\"toc__item -lev0\">Pre-Analysis<\/li>\n<li class=\"toc__item -lev0\">Geometry Creation<\/li>\n<li class=\"toc__item -lev0\">Mesh<\/li>\n<li class=\"toc__item -lev0\">Physics Setup<\/li>\n<li class=\"toc__item -lev0\">Results Evaluation<\/li>\n<li class=\"toc__item -lev0\">Validation<\/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><img decoding=\"async\" class=\"alignnone size-full wp-image-157238\" src=\"\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/08\/HM-34.png\" alt=\" width=\" height=\"186\" \/><\/p>\n<p>Consider the case of a fluid flowing past a cylinder, as illustrated above. Obtain the velocity and pressure distributions when the Reynolds number is chosen to be 20. In order to simplify the computation, the diameter of the cylinder is set to 1 m, the x component of the velocity is set to 1 m\/s and the density of the fluid is set to 1 kg\/m^3. Thus, the dynamic viscosity must be set to 0.05 kg\/m*s in order to obtain the desired Reynolds number.<\/p>\n<hr \/>\n<h4 content_id=\"pre-analysis\" class=\"toc__permalink\" content_id=\"pre-analysis\" class=\"toc__permalink\"  id=\"PRE-ANALYSIS\">Pre-Analysis<\/h4>\n<p><strong>Solution Domain<\/strong><\/p>\n<p>For an external flow problem like this, one needs to determine where to place the outer boundary. A square domain will be used for this simulation. The effects that the cylinder has on the flow extend far downstream. Thus, the distance to the outlet end boundary will be much larger than the distance to the inlet boundary.<\/p>\n<p><strong>Boundary Conditions<\/strong><\/p>\n<p>First, we will specify a velocity inlet boundary condition. We will set the left side of the outer boundary as a velocity inlet with a velocity of 1 m\/s in the x direction. Next, we will use a pressure outlet boundary condition for the right side of the outer boundary with a gauge pressure of 0 Pa. Lastly, we will apply a no slip boundary condition to the cylinder wall. The aforementioned boundary conditions are illustrated below.<\/p>\n<hr \/>\n<h4 content_id=\"geometry-creation\" class=\"toc__permalink\" content_id=\"geometry-creation\" class=\"toc__permalink\"  id=\"GEOMETRY-CREATION\">Geometry Creation<\/h4>\n<p>In this video, you will learn how to create a computational flow domain around the cylinder.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"\/\/play.vidyard.com\/wrZ693eftTsTtvpt5x7ype.html?\" width=\"700\" height=\"400\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><\/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 tutorial, we will be using\u00a0<strong>Physics-Aware Meshing<\/strong>. Physics-aware meshing helps automate and simplify your problem setup.\u00a0With physics-aware meshing, the computational mesh is generated automatically based on the solution fidelity setting and the physics inputs.<\/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 create a new material and assign fluid flow conditions to the model.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"\/\/play.vidyard.com\/Qsd3HFzeWB6MQSpSSBbHHJ.html?\" width=\"700\" height=\"400\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><\/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 check velocity vectors, pressure change in the fluid domain and total pressure on the cylinder walls.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"\/\/play.vidyard.com\/TWPY47kAQyjB8eUFw4cDZ4.html?\" width=\"700\" height=\"400\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<hr \/>\n<h4 content_id=\"validation\" class=\"toc__permalink\" content_id=\"validation\" class=\"toc__permalink\"  id=\"VALIDATION\">Validation<\/h4>\n<p>This tutorial will be compared to results found in the Fluent &#8211; SimCafe tutorial based on the same problem. Below is the pressure contour from the SimCafe tutorial.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-160419\" src=\"\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-300x173.png\" alt=\"\" width=\"300\" height=\"173\" srcset=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-300x173.png 300w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-1024x589.png 1024w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-768x442.png 768w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-50x29.png 50w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-100x58.png 100w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-24x14.png 24w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-36x21.png 36w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35-48x28.png 48w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-35.png 1183w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>This can be compared to the pressure contour calculated in the simulation. Select the pressure contour created in the results section, then change the Coloring to Banded to match the display style in the image above.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-160420\" src=\"\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-300x210.png\" alt=\"\" width=\"300\" height=\"210\" srcset=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-300x210.png 300w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-1024x716.png 1024w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-768x537.png 768w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-50x35.png 50w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-100x70.png 100w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-24x17.png 24w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-36x25.png 36w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36-48x34.png 48w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2022\/09\/HM-36.png 1084w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>The AIM solution not only has similar maximum and minimum values for pressure, but the shapes of the pressure contours are virtually identical.<\/p>\n<p>Reference<\/p>\n<p>Singleton, John Matthew, Jr., and Sebastien Lachance-Barrett. &#8220;FLUENT &#8211; Steady Flow Past a Cylinder.&#8221; Dashboard. Cornell University, 8 Feb. 2014. Web. 19 July 2017.<\/p>\n","protected":false},"template":"","class_list":["post-160162","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  20:20:10"],"_bbp_forum_id":["159552"],"_btv_view_count":["4417"],"_edit_lock":["1665575813:77457"],"_edit_last":["77457"],"_bbp_topic_id":["160162"],"_yoast_wpseo_content_score":["60"],"_yoast_wpseo_estimated-reading-time-minutes":["3"],"_yoast_wpseo_wordproof_timestamp":[""],"family":[""],"application_name":[""],"product_version":[""]},"test":"solution"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/160162","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\/160162\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=160162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}