{"id":278761,"date":"2023-04-11T01:17:42","date_gmt":"2023-04-11T01:17:42","guid":{"rendered":"\/forum\/forums\/topic\/boundary-condition-of-ffowcs-williams-hawkings-model\/"},"modified":"2023-04-11T01:32:23","modified_gmt":"2023-04-11T01:32:23","slug":"boundary-condition-of-ffowcs-williams-hawkings-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-condition-of-ffowcs-williams-hawkings-model\/","title":{"rendered":"Boundary Condition of Ffowcs Williams Hawkings model"},"content":{"rendered":"

Hello <\/p>\n

I’m calculating sound generated by water flow in pipe by using LES and Ffowks Williams Hawkings model (FW-H model).<\/p>\n

My question is what boundary condition does FW-H model use?<\/p>\n

The theory guide mentions that the model is applicable to the far-field acoustic wave and acoustic propagation toward free space. Does it means each source grid is a point source? The pipe wall isn’t the boudary condition such as reflection?<\/p>\n

Also I’m a little bit confusing. Can we change the boundary condition of FH-W model by using the Boudnary Acoustic Wave Models?  https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v212\/en\/flu_ug\/flu_ug_sec_nrbc.html<\/a><\/p>\n

Thank you.<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-278761","topic","type-topic","status-closed","hentry","topic-tag-acoustics","topic-tag-acousticwaves","topic-tag-ffowcs-william-hawkings-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["264444","13659"],"_bbp_author_ip":["23.220.96.181"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1449"],"_edit_lock":["1681176675:192986"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["278761"],"_bbp_forum_id":["27792"],"_bbp_engagement":["13659","264444"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["279172"],"_bbp_last_active_id":["279172"],"_bbp_last_active_time":["2023-04-12 21:33:55"]},"test":"hamanaka-ytamu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/278761","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\/278761\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=278761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}