{"id":161490,"date":"2023-01-25T07:16:05","date_gmt":"2023-01-25T07:16:05","guid":{"rendered":"\/knowledge\/forums\/topic\/how-can-i-display-all-my-ffts-in-a-single-plot\/"},"modified":"2023-07-31T12:35:23","modified_gmt":"2023-07-31T12:35:23","slug":"how-can-i-display-all-my-ffts-in-a-single-plot","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-can-i-display-all-my-ffts-in-a-single-plot\/","title":{"rendered":"How can I display all my FFTs in a single plot?"},"content":{"rendered":"<p>In the FFT post-processing menu, you can plot only one FFT at a time.  If you want to plot more FFTs on a single plot, trick is to record FFTs in xy files (check &#8220;Write FFT to file&#8221; in FFT menu). Then, load each FFT xy file in Report\/Plot menu and display all FFTs in the same single plot to directly compare signal properties.  Also remember that input signals treated by FFT tools are normalized (calculated per 1 Hz) in Fluent, which allows one to perform a consistent comparison between continuous broad-band spectra. In fact, this observation stems from the definition of Power Spectral Density used in Fluent.    Keywords: spectral analysis, FFT, plot<\/p>\n","protected":false},"template":"","class_list":["post-161490","topic","type-topic","status-publish","hentry","topic-tag-fluent","topic-tag-fluent-post-processing","topic-tag-fluid-dynamics","topic-tag-post-processing"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["23.56.168.180"],"_bbp_last_active_time":["1-24-2023  20:20:15"],"_btv_view_count":["1795"],"siebel_km_number":["2061384"],"product_version":[""],"km_published_date":["2019-11-06T14:55:37.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161490","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\/161490\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}