{"id":43284,"date":"2020-04-27T04:10:05","date_gmt":"2020-04-27T04:10:05","guid":{"rendered":"\/forum\/forums\/topic\/drag-coefficient-in-ansys-fluent\/"},"modified":"2020-04-27T04:10:05","modified_gmt":"2020-04-27T04:10:05","slug":"drag-coefficient-in-ansys-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/drag-coefficient-in-ansys-fluent\/","title":{"rendered":"Drag Coefficient in ANSYS Fluent"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I am fairly new to ANSYS and have been trying to get accustomed to finding the drag coefficients of various airfoils. To start with, I attempted to find the drag coefficient of a sphere, which is well known to be 0.47 at a Reynolds number less than 1E5. However, the result which Fluent returned to me after converging was 0.0041759, which does not make any sense to me. If anyone can identify what my mistake was in either meshing or setup, please let me know. The settings are listed below:<\/p>\n<p><\/p>\n<p>Model type: 0.5 m sphere within a 2x1x1 rectangular enclosure<\/p>\n<p><\/p>\n<p>General:<\/p>\n<p><\/p>\n<p>-pressure-based<\/p>\n<p><\/p>\n<p>Models:<\/p>\n<p><\/p>\n<p>-Realizable k-epsilon<\/p>\n<p><\/p>\n<p>Materials:<\/p>\n<p><\/p>\n<p>-Fluid, Air, ideal-gas model<\/p>\n<p><\/p>\n<p>Boundary Conditions:<\/p>\n<p><\/p>\n<p>-velocity inlet, v=3 m\/s<\/p>\n<p><\/p>\n<p>-no-slip boundary on the sphere<\/p>\n<p><\/p>\n<p>-shear force of 0 on the walls<\/p>\n<p><\/p>\n<p>Methods:<\/p>\n<p><\/p>\n<p>-second-order on all spatial discretization settings<\/p>\n<p><\/p>\n<p>Iterations:<\/p>\n<p><\/p>\n<p>5000<\/p>\n<p><\/p>\n<p>Any advice is appreciated!<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-43284","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["15465"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["2985"],"_bbp_subscription":["246217"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["43284"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","171892"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["112757"],"_bbp_last_active_id":["112757"],"_bbp_last_active_time":["2020-04-28 06:02:52"]},"test":"itb7"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/43284","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\/43284\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=43284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}