{"id":404495,"date":"2025-01-10T22:22:25","date_gmt":"2025-01-10T22:22:25","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/caa-method-vs-fw-h-method\/"},"modified":"2025-01-10T22:22:25","modified_gmt":"2025-01-10T22:22:25","slug":"caa-method-vs-fw-h-method","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/caa-method-vs-fw-h-method\/","title":{"rendered":"CAA method vs fw-h Method"},"content":{"rendered":"<p>&lt;p&gt;Hi,&lt;br&gt;&lt;br&gt;&lt;\/p&gt;&lt;p&gt;I want to simulate the acoustic signals of fluid flowing through a pipe with a leak, using water as the fluid. I have conducted three tests:&lt;\/p&gt;<\/p>\n<ol>\n<li>Incompressible fluid with the CAA method<\/li>\n<li>Incompressible fluid with the FW-H method<\/li>\n<li>Compressible fluid with the CAA method<\/li>\n<\/ol>\n<p>&lt;p&gt;The results indicate that tests 1 and 2 yield similar acoustic outcomes. However, there is a significant difference in the results of test 3. I understand that the CAA method requires the use of compressible fluids. It appears that the main distinction in the results is due to whether the fluid is compressible or incompressible, rather than the choice between the CAA and FW-H methods&lt;br&gt;&lt;br&gt;the plot below shows the acoustics results of compressible and incompressible fluid using the CAA method&lt;br&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/10-01-2025-1736547695-mceclip0.png\" width=\"748\" height=\"365\" \/>&lt;\/p&gt;&lt;p&gt;Please don&#8217;t heasite if you need further information&lt;\/p&gt;&lt;p&gt;Thanks,&nbsp;&lt;\/p&gt;&lt;p&gt;Jingyu Liu&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-404495","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["404495"],"_bbp_subscription":["130852","13659"],"_bbp_author_ip":["128.194.2.227"],"_bbp_last_reply_id":["406211"],"_bbp_last_active_id":["406211"],"_bbp_last_active_time":["2025-01-20 14:24:34"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["130852","13659"],"_btv_view_count":["177"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["130852"]},"test":"jingyuliutamu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/404495","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\/404495\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=404495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}