{"id":455877,"date":"2026-04-07T01:35:38","date_gmt":"2026-04-07T01:35:38","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-naca-4412-airfoil-meshing-problem\/"},"modified":"2026-04-07T01:35:38","modified_gmt":"2026-04-07T01:35:38","slug":"2d-naca-4412-airfoil-meshing-problem","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-naca-4412-airfoil-meshing-problem\/","title":{"rendered":"2D NACA 4412 airfoil meshing problem"},"content":{"rendered":"

<div class=”OutlineElement Ltr SCXW229732716 BCX0″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”NormalTextRun SCXW229732716 BCX0″>I am trying to simulate a 2D NACA 4412 airfoil in ANSYS Fluent, and I have run into a meshing problem.<\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":240,"335559739":240}”> <\/span><\/p><\/div><div class=”OutlineElement Ltr SCXW229732716 BCX0″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”NormalTextRun SCXW229732716 BCX0″>I divided the computational domain into six sections, but one section consistently fails to generate a proper mesh.<\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":240,"335559739":240}”> <\/span><\/p><\/div><div class=”OutlineElement Ltr SCXW229732716 BCX0″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”NormalTextRun SCXW229732716 BCX0″>To solve this issue, I have tried several approaches:<\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":240,"335559739":240}”> <\/span><\/p><\/div><div class=”ListContainerWrapper SCXW229732716 BCX0″><ul class=”BulletListStyle1 SCXW229732716 BCX0″ role=”list”><li class=”OutlineElement Ltr SCXW229732716 BCX0″ role=”listitem” aria-setsize=”-1″ data-leveltext=”\uf0b7” data-font=”Symbol” data-listid=”2″ data-list-defn-props=”{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"\uf0b7","469777815":"hybridMultilevel"}” data-aria-posinset=”1″ data-aria-level=”1″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”NormalTextRun SCXW229732716 BCX0″>Using different numbers of airfoil coordinates from the <\/span><span class=”NormalTextRun SCXW229732716 BCX0″>.txt<\/span><span class=”NormalTextRun SCXW229732716 BCX0″> file downloaded from the Airfoil Tools website <\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":0,"335559739":0}”> <\/span><\/p><\/li>\n<\/ul>\n

<\/div><div class=”ListContainerWrapper SCXW229732716 BCX0″><ul class=”BulletListStyle1 SCXW229732716 BCX0″ role=”list”><li class=”OutlineElement Ltr SCXW229732716 BCX0″ role=”listitem” aria-setsize=”-1″ data-leveltext=”\uf0b7” data-font=”Symbol” data-listid=”2″ data-list-defn-props=”{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"\uf0b7","469777815":"hybridMultilevel"}” data-aria-posinset=”2″ data-aria-level=”1″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”NormalTextRun SCXW229732716 BCX0″>Changing meshing parameters multiple times, such as the number of divisions, bias factors, and behavior settings (Hard or Soft) <\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":0,"335559739":0}”> <\/span><\/p><\/li>\n<\/ul>\n

<\/div><div class=”ListContainerWrapper SCXW229732716 BCX0″><ul class=”BulletListStyle1 SCXW229732716 BCX0″ role=”list”><li class=”OutlineElement Ltr SCXW229732716 BCX0″ role=”listitem” aria-setsize=”-1″ data-leveltext=”\uf0b7” data-font=”Symbol” data-listid=”2″ data-list-defn-props=”{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"\uf0b7","469777815":"hybridMultilevel"}” data-aria-posinset=”3″ data-aria-level=”1″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”TextRun SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US” data-contrast=”auto”><span class=”NormalTextRun SCXW229732716 BCX0″>Creating the 2D geometry in both <\/span><span class=”NormalTextRun SpellingErrorV2Themed SCXW229732716 BCX0″>DesignModeler<\/span><span class=”NormalTextRun SCXW229732716 BCX0″> and <\/span><span class=”NormalTextRun SpellingErrorV2Themed SCXW229732716 BCX0″>SpaceClaim<\/span><span class=”NormalTextRun SCXW229732716 BCX0″> <\/span><\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":0,"335559739":0}”> <\/span><\/p><\/li>\n<\/ul>\n

<\/div><div class=”ListContainerWrapper SCXW229732716 BCX0″><ul class=”BulletListStyle1 SCXW229732716 BCX0″ role=”list”><li class=”OutlineElement Ltr SCXW229732716 BCX0″ role=”listitem” aria-setsize=”-1″ data-leveltext=”\uf0b7” data-font=”Symbol” data-listid=”2″ data-list-defn-props=”{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"\uf0b7","469777815":"hybridMultilevel"}” data-aria-posinset=”4″ data-aria-level=”1″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”TextRun SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US” data-contrast=”auto”><span class=”NormalTextRun SCXW229732716 BCX0″>Modifying the geometry by changing the trailing edge from a point into a finite-thickness section and dividing the domain into <\/span><span class=”NormalTextRun SCXW229732716 BCX0″>7<\/span><span class=”NormalTextRun SCXW229732716 BCX0″>sections instead of <\/span><span class=”NormalTextRun SCXW229732716 BCX0″>6<\/span><span class=”NormalTextRun SCXW229732716 BCX0″> <\/span><\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":0,"335559739":0}”> <\/span><\/p><\/li>\n<\/ul>\n

<\/div><div class=”OutlineElement Ltr SCXW229732716 BCX0″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”TextRun SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US” data-contrast=”auto”><span class=”NormalTextRun SCXW229732716 BCX0″>However, the problem <\/span><span class=”NormalTextRun SCXW229732716 BCX0″>still seems to be<\/span><span class=”NormalTextRun SCXW229732716 BCX0″> caused by a very tiny line segment, which makes the mesh fail.<\/span><span class=”NormalTextRun SCXW229732716 BCX0″> <\/span><span class=”NormalTextRun SCXW229732716 BCX0″>I am using ANSYS Student 2025 R2.<\/span><\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":240,"335559739":240}”> <\/span><\/p><\/div><div class=”OutlineElement Ltr SCXW229732716 BCX0″><p class=”Paragraph SCXW229732716 BCX0″ lang=”EN-US” xml:lang=”EN-US”><span class=”NormalTextRun SCXW229732716 BCX0″>Has anyone experienced a similar problem or know how to fix it? I would really appreciate any suggestions.<\/span><span class=”EOP SCXW229732716 BCX0″ data-ccp-props=”{"134233117":false,"134233118":false,"335551550":6,"335551620":6,"335559738":240,"335559739":240}”> \"\"<\/span><\/p><\/div><\/p>\n","protected":false},"template":"","class_list":["post-455877","topic","type-topic","status-publish","hentry","topic-tag-2d-airfoil","topic-tag-airfoil","topic-tag-cfd-dem","topic-tag-fluent","topic-tag-mesh","topic-tag-meshing","topic-tag-naca-airfoils-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["455877"],"_bbp_author_ip":["2600:6c64:63f0:3a70:bc83:cc7f:af52:f3f9"],"_bbp_last_reply_id":["455933"],"_bbp_last_active_id":["455933"],"_bbp_last_active_time":["2026-04-07 12:29:29"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["672844","199"],"_btv_view_count":["29"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["1"],"_bbp_subscription":["199"]},"test":"yfffff1026gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/455877","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\/455877\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=455877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}