{"id":186345,"date":"2021-07-27T16:46:26","date_gmt":"2021-07-27T16:46:26","guid":{"rendered":"\/forum\/forums\/reply\/186345\/"},"modified":"2021-07-27T16:46:26","modified_gmt":"2021-07-27T16:46:26","slug":"186345","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/186345\/","title":{"rendered":"Reply To: Is this a mistake in Fluent formulations in porous media?"},"content":{"rendered":"<p>Here is the issue and I hope I get an answer or ANSYS Fluent correct it or make it clear in the upcoming versions:<br \/>\nThe formulation from the latest version of Fluent is the correct one but here is the problem:<br \/>\nEq 7-19 Fluent User Guide 2021 R1 is in terms of the physical velocity. superficial velocity = porosity x physical velocity. Substituting this into Eq 7-19, we get the following in terms of the superficial velocity:<br \/>\n<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/555\/AEO2CKRDJPEA.png\" width=\"\" height=\"\" \/>Here &#8220;u&#8221; is the superficial velocity and epsilon is the porosity. ANSYS Fluent User Guide is saying that &#8220;Porous media are modeled by the addition of a momentum source term to the standard fluid flow equations&#8221;. Basically, it is the last term on the right-hand side without the porosity. Most papers just use the standard governing equations with the additional sink term and state that this is how Fluent considers for porous medium. Please clarify and help with this.<br \/>\nThanks<\/p>\n","protected":false},"template":"","class_list":["post-186345","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Here is the issue and I hope I get an answer or ANSYS Fluent correct it or make it clear in the upcoming versions: The formulation from the latest version of Fluent is the correct one but here is the problem: Eq 7-19 Fluent User Guide 2021 R1 is in terms of the physical velocity.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/186345\/\" \/>\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=\"Reply To: Is this a mistake in Fluent formulations in porous media? | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Here is the issue and I hope I get an answer or ANSYS Fluent correct it or make it clear in the upcoming versions: The formulation from the latest version of Fluent is the correct one but here is the problem: Eq 7-19 Fluent User Guide 2021 R1 is in terms of the physical velocity.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/186345\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/forum-uploads\/555\/AEO2CKRDJPEA.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/forum-uploads\/555\/AEO2CKRDJPEA.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-07-27T16:46:26+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-07-27T16:46:26+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Is this a mistake in Fluent formulations in porous media? 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