{"id":383829,"date":"2024-09-23T19:37:20","date_gmt":"2024-09-23T19:37:20","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/drone-zero-lift-help\/"},"modified":"2024-10-09T15:53:39","modified_gmt":"2024-10-09T15:53:39","slug":"drone-zero-lift-help","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/drone-zero-lift-help\/","title":{"rendered":"Drone zero lift help"},"content":{"rendered":"<p>&lt;p&gt;hello&lt;br&gt;Im trying to simulate a drone as a school project, the issue is im getting zero lift force.&lt;br&gt;to my understanding is that the thrust should only be applied byt the quadcopter&#8217;s rotors and not through the velocity inlet.&lt;br&gt;I have tried steady state with angular velocity given the rotor&#8217;s walls, and I have tried MRF using rotating mesh, at an rpm of 10000.&lt;br&gt;the report definition measuring the forces on the walls.&lt;br&gt;the drone is inclined forwards with a pitch of 30 degress&lt;br&gt;velocity&nbsp; inlet at the front with speed = 0, or pressure outlet it gave the same result.&lt;br&gt;rear face of the domain is a pressure outlet&lt;br&gt;all the walls around the exterior of the domain aside from these two are symmetry.&lt;br&gt;I am stuck as I dont know what else am I missing.&lt;br&gt;using my sense the rotor&#8217;s rotation should be enough to provide measurable thrust to move the drone upwards and forwards.&lt;br&gt;&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/09\/23-09-2024-1727119367-mceclip1.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-383829","topic","type-topic","status-answered","hentry","topic-tag-fluent","topic-tag-lift","topic-tag-mrf","topic-tag-rotor-1","topic-tag-spaceclaim"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["266911","199"],"_bbp_author_ip":["41.254.71.28"],"_btv_view_count":["272"],"_bbp_topic_status":["answered"],"_edit_lock":["1727126961:266911"],"_bbp_likes_count":["1"],"_bbp_topic_id":["383829"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","266911"],"_bbp_voice_count":["2"],"_bbp_last_reply_id":["388799"],"_bbp_last_active_id":["388799"],"_bbp_last_active_time":["2024-10-09 15:51:25"]},"test":"eng-26248uob-edu-ly"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/383829","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/383829\/revisions"}],"predecessor-version":[{"id":388800,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/383829\/revisions\/388800"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=383829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}