{"id":161701,"date":"2023-01-25T07:16:44","date_gmt":"2023-01-25T07:16:44","guid":{"rendered":"\/knowledge\/forums\/topic\/how-to-setup-the-mass-flow-rate-of-dpm-point-injection-in-2d-and-in-2d-axisymmetric-in-ansys-fluent\/"},"modified":"2023-07-31T12:35:44","modified_gmt":"2023-07-31T12:35:44","slug":"how-to-setup-the-mass-flow-rate-of-dpm-point-injection-in-2d-and-in-2d-axisymmetric-in-ansys-fluent","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-to-setup-the-mass-flow-rate-of-dpm-point-injection-in-2d-and-in-2d-axisymmetric-in-ansys-fluent\/","title":{"rendered":"How to setup the mass flow rate of DPM point injection in 2D and in 2D Axisymmetric in ANSYS FLUENT?"},"content":{"rendered":"<p>The manual explains the difference between 2D axisymmetric and 2D non-axisymmetric.  2D non-axi-symmetric: the model will consider that your injection (which will have the form of a slot &#8211; collection of injections points on a line of a meter long) is 1 meter long in the 3rd dimension. This implies that if your device is 0.,25 m in the non-simulated dimension, you will have to use a mass flow rate 4 times higher (x kg\/s per 0.25 m = 4x kg\/s per meter).   2D axi-symmetric: per 2pi radiant also means per 360 degree or for the entire circle. In this case, FLUENT will assume that your injection is a circle of 360 degrees, i.e. a collection of injection points along a circle. For example, if you define an injection point at x = 0, y = 0.5 m (z is the axis of revolution) with a mass flow rate of 1 kg\/s, you will actually be modeling an injection which is a circle of radius 0.5 and center x = z = y = 0.0 and a mass flow rate of 1 kg\/s.  In conclusion, if you are modeling this type of injection (a circle), then you do not have to divide your mass flow rate.  If your problem (in 3D) only has 1 injection point, then there is no problem because this is not an axisymmetric problem and need to be modelled in 3D.<\/p>\n","protected":false},"template":"","class_list":["post-161701","topic","type-topic","status-publish","hentry","topic-tag-4457","topic-tag-dpm","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-injections","topic-tag-multiphase"],"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  20:20:22"],"_btv_view_count":["2645"],"siebel_km_number":["1000521"],"product_version":["14"],"km_published_date":["2010-01-06T06:16:14.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161701","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\/161701\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161701"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}