{"id":163503,"date":"2021-10-28T16:17:26","date_gmt":"2021-10-28T16:17:26","guid":{"rendered":"\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/"},"modified":"2021-12-03T15:31:24","modified_gmt":"2021-12-03T15:31:24","slug":"for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/","title":{"rendered":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it&#8217;s sphere or cylinder."},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won&#039;t match with either case (analytical results of cylinder and sphere)<\/p>\n<p>A similar thing happened when I did analysis for lumped analysis for sphere (circle in 2D) and walls of the circle are given temperature boundary conditions with heat transfer coefficient calculated from Biot formula. I found that the area-weighted average of temperature doesn&#039;t match with analytical values if I take the characteristic length as the radius. <strong>Why in this case characteristic length is radius instead of R\/3.<\/strong> I have seen many online resources and many have taken Lc = R. So I finally got the answer with I took the 3D model and solved it (here Lc = R was taken).<\/p>\n<p><\/p>\n<\/p>\n<p>I am stuck in a similar condition where I need to analyze the flow over the sphere. What are the<strong> procedures to find the coefficient of lift and drag if ANSYS cannot decide between sphere and cylinder?<\/strong> Is it viable to find lift and drag force then convert to lift and drag coefficient? Else do I need to perform 3D analysis.<\/p>\n","protected":false},"template":"","class_list":["post-163503","topic","type-topic","status-closed","hentry","topic-tag-aerodynamics","topic-tag-cylinder","topic-tag-fluent","topic-tag-sphere"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won&#039;t match with either case (analytical results of cylinder and sphere)A similar thing happened when I did\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder. | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won&#039;t match with either case (analytical results of cylinder and sphere)A similar thing happened when I did\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-10-28T16:17:26+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-12-03T15:31:24+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder. | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won&#039;t match with either case (analytical results of cylinder and sphere)A similar thing happened when I did\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fluent\\\/#listItem\",\"name\":\"fluent\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fluent\\\/#listItem\",\"position\":3,\"name\":\"fluent\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fluent\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\\\/#listItem\",\"name\":\"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it&#8217;s sphere or cylinder.\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\\\/#listItem\",\"position\":4,\"name\":\"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it&#8217;s sphere or cylinder.\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/fluent\\\/#listItem\",\"name\":\"fluent\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\\\/\",\"name\":\"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\\u2019s sphere or cylinder. | Ansys Learning Forum\",\"description\":\"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won't match with either case (analytical results of cylinder and sphere)A similar thing happened when I did\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\\\/#breadcrumblist\"},\"datePublished\":\"2021-10-28T16:17:26+00:00\",\"dateModified\":\"2021-12-03T15:31:24+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder. | Ansys Learning Forum","description":"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won't match with either case (analytical results of cylinder and sphere)A similar thing happened when I did","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fluent\/#listItem","name":"fluent"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fluent\/#listItem","position":3,"name":"fluent","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fluent\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/#listItem","name":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it&#8217;s sphere or cylinder."},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/#listItem","position":4,"name":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it&#8217;s sphere or cylinder.","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fluent\/#listItem","name":"fluent"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/","name":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder. | Ansys Learning Forum","description":"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won't match with either case (analytical results of cylinder and sphere)A similar thing happened when I did","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/#breadcrumblist"},"datePublished":"2021-10-28T16:17:26+00:00","dateModified":"2021-12-03T15:31:24+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder. | Ansys Learning Forum","og:description":"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won't match with either case (analytical results of cylinder and sphere)A similar thing happened when I did","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/","article:published_time":"2021-10-28T16:17:26+00:00","article:modified_time":"2021-12-03T15:31:24+00:00","twitter:card":"summary_large_image","twitter:title":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder. | Ansys Learning Forum","twitter:description":"I had this question in my mind for the past few days. In case if I simulate the flow over the cylinder and I wish to perform 2D analysis I guess the results (coefficient of lift and drag) won't match with either case (analytical results of cylinder and sphere)A similar thing happened when I did"},"aioseo_meta_data":{"post_id":"163503","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 20:24:48","updated":"2024-10-28 20:24:48","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fluent\/\" title=\"fluent\">fluent<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tFor analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it\u2019s sphere or cylinder.\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"fluent","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/fluent\/"},{"label":"For analysis of flow over cylinder or sphere in 2D- How does ANSYS knows it&#8217;s sphere or cylinder.","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/for-analysis-of-flow-over-cylinder-or-sphere-in-2d-how-does-ansys-knows-its-sphere-or-cylinder\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["3098"],"_bbp_likes_count":["0"],"_bbp_subscription":["236860"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["163503"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","158298"],"_bbp_voice_count":["2"],"_bbp_reply_count":["19"],"_bbp_last_reply_id":["196175"],"_bbp_last_active_id":["196175"],"_bbp_last_active_time":["2021-12-03 15:31:24"]},"test":"ananth-narayan"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/163503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/163503\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=163503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}