{"id":157149,"date":"2022-06-06T08:32:55","date_gmt":"2022-06-06T08:32:55","guid":{"rendered":"\/knowledge\/forums\/topic\/how-do-i-access-the-phase-information-of-acoustic-pressure-in-aero-acoustic-simulations-2\/"},"modified":"2022-06-06T08:32:55","modified_gmt":"2022-06-06T08:32:55","slug":"how-do-i-access-the-phase-information-of-acoustic-pressure-in-aero-acoustic-simulations-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-do-i-access-the-phase-information-of-acoustic-pressure-in-aero-acoustic-simulations-2\/","title":{"rendered":"How do I access the phase information of acoustic pressure in aero-acoustic simulations?"},"content":{"rendered":"<p>First, run a transient CFD-simulation using the FWH acoustics model, and record asd-files in regions of interest (asd: acoustic source data). After the simulation, go to &#8220;Run Calculation&#8221;, and select &#8220;Acoustic Sources FFT&#8221;. In the &#8220;Read ASD Files&#8221; tab, select the *.index-file, which accesses all relevant asd-files. Click &#8220;Read&#8221;. After, compute FFT fields in the related tab. In the &#8220;FFT Surface Variables&#8221; tab, select &#8220;Set of Modes&#8221; as &#8220;Modes\/Frequency Bands&#8221;, and then click &#8220;Create&#8221;. Doing so creates real and imaginary parts of the complex pressure. Using them, the magnitude and the phase of the pressure signal can be computed. Phase-spectrum of phase-angle PSI: tan PSI(f) = ImY(f)\/ReY(f) Magnitude-spectrum: |Y(f)| = (ReY(f)^2+ImY(f)^2)^1\/2 By means of custom-field-functions, the real and imaginary parts can be combined to get the phase information.<\/p>\n","protected":false},"template":"","class_list":["post-157149","topic","type-topic","status-publish","hentry","topic-tag-acoustic","topic-tag-acoustic-source-data"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["06-06-2022 20:20"],"_bbp_forum_id":["27796"],"_btv_view_count":["1086"],"_bbp_likes_count":["0"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/157149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/157149\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=157149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}