{"id":317710,"date":"2023-11-15T01:43:58","date_gmt":"2023-11-15T01:43:58","guid":{"rendered":"\/forum\/forums\/topic\/why-do-unexpected-shock-waves-occur-at-fluidic-oscillator\/"},"modified":"2023-11-15T01:43:58","modified_gmt":"2023-11-15T01:43:58","slug":"why-do-unexpected-shock-waves-occur-at-fluidic-oscillator","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-do-unexpected-shock-waves-occur-at-fluidic-oscillator\/","title":{"rendered":"Why do unexpected shock waves occur at Fluidic OScillator?"},"content":{"rendered":"<p>Hi. I&#8217;m trying to study the oscillation angle of a fluid vibrator.<\/p>\n<p>And, I have actual research data through wind tunnel experiments.<\/p>\n<p>Based on the data, the time step and inlet pressure are set to proceed, but the oscillation dosen&#8217;t continue.<\/p>\n<p>The settings are,&nbsp;(Pressure inlet &#8211; 340 kPa(gauge)) \/ (time step &#8211; 1\/8 cycle for real freqyency) \/ (k-epsilon 2eqn &amp; Coupled methods &amp; Air for ideal gas, sutherland&#8217;s law) \/ (Hybrid initialize)<\/p>\n<p>total 1 milion fluent mesh, Most mesh insid<span style=\"font-size: 14pt\">e the fluid vibrator, Others, it was distributed appropriately.<\/span><img decoding=\"async\" style=\"font-size: 18.6667px\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/15-11-2023-1700012481-kket.png\" alt=\"\"><\/p>\n<p>Sometimes, I have to make the time step very large so it oscillate, I don&#8217;t know what&#8217;s wrong.<\/p>\n<p>Please advise. Thx.<\/p>\n","protected":false},"template":"","class_list":["post-317710","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi. I&#039;m trying to study the oscillation angle of a fluid vibrator.And, I have actual research data through wind tunnel experiments.Based on the data, the time step and inlet pressure are set to proceed, but the oscillation dosen&#039;t continue.The settings are, (Pressure inlet - 340 kPa(gauge)) \/ (time step - 1\/8 cycle for real freqyency) \/\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-do-unexpected-shock-waves-occur-at-fluidic-oscillator\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Why do unexpected shock waves occur at Fluidic OScillator? | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi. I&#039;m trying to study the oscillation angle of a fluid vibrator.And, I have actual research data through wind tunnel experiments.Based on the data, the time step and inlet pressure are set to proceed, but the oscillation dosen&#039;t continue.The settings are, (Pressure inlet - 340 kPa(gauge)) \/ (time step - 1\/8 cycle for real freqyency) \/\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-do-unexpected-shock-waves-occur-at-fluidic-oscillator\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/15-11-2023-1700012481-kket.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/15-11-2023-1700012481-kket.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-11-15T01:43:58+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-11-15T01:43:58+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Why do unexpected shock waves occur at Fluidic OScillator? | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi. 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I'm trying to study the oscillation angle of a fluid vibrator.And, I have actual research data through wind tunnel experiments.Based on the data, the time step and inlet pressure are set to proceed, but the oscillation dosen't continue.The settings are, (Pressure inlet - 340 kPa(gauge)) \\\/ (time step - 1\\\/8 cycle for real freqyency) \\\/\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/why-do-unexpected-shock-waves-occur-at-fluidic-oscillator\\\/#breadcrumblist\"},\"datePublished\":\"2023-11-15T01:43:58+00:00\",\"dateModified\":\"2023-11-15T01:43:58+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Why do unexpected shock waves occur at Fluidic OScillator? | Ansys Learning Forum","description":"Hi. 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I'm trying to study the oscillation angle of a fluid vibrator.And, I have actual research data through wind tunnel experiments.Based on the data, the time step and inlet pressure are set to proceed, but the oscillation dosen't continue.The settings are, (Pressure inlet - 340 kPa(gauge)) \/ (time step - 1\/8 cycle for real freqyency) \/","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-do-unexpected-shock-waves-occur-at-fluidic-oscillator\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/15-11-2023-1700012481-kket.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/15-11-2023-1700012481-kket.png","article:published_time":"2023-11-15T01:43:58+00:00","article:modified_time":"2023-11-15T01:43:58+00:00","twitter:card":"summary_large_image","twitter:title":"Why do unexpected shock waves occur at Fluidic OScillator? | Ansys Learning Forum","twitter:description":"Hi. 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