{"id":171036,"date":"2023-06-05T07:05:33","date_gmt":"2023-06-05T07:05:33","guid":{"rendered":"\/knowledge\/forums\/topic\/when-a-fine-near-wall-mesh-is-created-to-achieve-y1-for-use-with-sst-or-k-w-what-to-do-when-rough-walls-are-applied\/"},"modified":"2023-07-31T12:29:55","modified_gmt":"2023-07-31T12:29:55","slug":"when-a-fine-near-wall-mesh-is-created-to-achieve-y1-for-use-with-sst-or-k-w-what-to-do-when-rough-walls-are-applied","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/when-a-fine-near-wall-mesh-is-created-to-achieve-y1-for-use-with-sst-or-k-w-what-to-do-when-rough-walls-are-applied\/","title":{"rendered":"When a fine near-wall mesh is created to achieve y+=1 for use with SST or k-w, what to do when rough walls are applied?"},"content":{"rendered":"<p>If you try to move nodes closer to wall to reduce y+ then you may not get exact y+ value needed. This is because, internally, the solver is using 0.5*sand grain height to determine the minimum y+.  In such cases typically generate a mesh to achieve y+=1 for a smooth wall case, then apply wall roughness and don&#8217;t modify the mesh.   Keywords: rough walls, sand grain<\/p>\n","protected":false},"template":"","class_list":["post-171036","topic","type-topic","status-publish","hentry","topic-tag-4422","topic-tag-cfx","topic-tag-fluid-dynamics","topic-tag-general-cfx","topic-tag-near-wall-mesh","topic-tag-rough-walls","topic-tag-sand-grain","topic-tag-y"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["2\/6\/2023 20:20"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["209.182.204.162"],"_btv_view_count":["597"],"siebel_km_number":["2048382"],"product_version":["18"],"km_published_date":["2017-02-22T00:00:00.000Z"],"family":["Fluid Dynamics"],"application_name":["CFX"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/171036","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\/171036\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=171036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}