{"id":320196,"date":"2023-11-30T09:04:51","date_gmt":"2023-11-30T09:04:51","guid":{"rendered":"\/forum\/forums\/reply\/320196\/"},"modified":"2023-11-30T09:04:51","modified_gmt":"2023-11-30T09:04:51","slug":"320196","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/320196\/","title":{"rendered":"Reply To: Why Negative Moment – Wind Turbine – & Residuals"},"content":{"rendered":"

<p>I’ve not modelled any full scale VAWTS, but do work with some of the clients who do. Aerodynamics is more often linked to meshing, so I leave it to colleagues. But with a few years of modelling “stuff” they’re not too complex. <\/p><p>Ideally you want to drop the residual below 1e-3 for continuity. Assuming the mesh is good then generally that means reducing the timestep. <\/p><p>OK, so you’re summing the moment on all (6?) faces of all blades. I assume you checked for any area\/vector definitions in the moment panel? How is the motion defined? Ie is speed purely a function of the sum of the blade moments? <\/p><\/p>\n","protected":false},"template":"","class_list":["post-320196","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/320196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/320196\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=320196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}