{"id":161537,"date":"2023-01-25T07:16:17","date_gmt":"2023-01-25T07:16:17","guid":{"rendered":"\/knowledge\/forums\/topic\/how-could-the-pressure-jump-through-a-perforated-pipe-or-porous-membrane-be-modeled-in-ansys-cfx\/"},"modified":"2023-07-31T12:35:28","modified_gmt":"2023-07-31T12:35:28","slug":"how-could-the-pressure-jump-through-a-perforated-pipe-or-porous-membrane-be-modeled-in-ansys-cfx","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-could-the-pressure-jump-through-a-perforated-pipe-or-porous-membrane-be-modeled-in-ansys-cfx\/","title":{"rendered":"How could the pressure jump through a perforated pipe or porous membrane be modeled in ANSYS CFX?"},"content":{"rendered":"<p>There are two ways to incooperate such a loss.   1) You model the perforated plate as as a very thin porosity. For this you would need a thin volume mesh in that region and apply the loss via a general momentum source or via the porosity settings.   2) You model the pressure jump with an interface. For this you need an interface (can be 1:1) at the location of the perforated plate. Then go to interface settings -> Additional Interface model -> Interface model -> Pressure change   Here can define an expression of the form: dp = a *v + b * v * |v|  This can be used in the interface settings. Attached please find a test case demonstrating the second approach.<\/p>\n","protected":false},"template":"","class_list":["post-161537","topic","type-topic","status-publish","hentry","topic-tag-4424","topic-tag-cfx","topic-tag-fluid-dynamics","topic-tag-general","topic-tag-general-cfx","topic-tag-interfaces"],"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  20:20:26"],"_btv_view_count":["2185"],"siebel_km_number":["2039328"],"product_version":["16"],"km_published_date":["2015-05-18T16:13:28.000Z"],"family":["Fluid Dynamics"],"application_name":["CFX"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161537","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\/161537\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}