{"id":223271,"date":"2022-08-04T12:24:46","date_gmt":"2022-08-04T12:24:46","guid":{"rendered":"\/forum\/forums\/reply\/223271\/"},"modified":"2022-08-04T12:24:46","modified_gmt":"2022-08-04T12:24:46","slug":"223271","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/223271\/","title":{"rendered":"Reply To: DPM boundary UDF for a filter"},"content":{"rendered":"<p>&lt;p&gt;if (particle diameter &gt; D_filter_size)&lt;\/p&gt;&lt;p&gt;{&lt;\/p&gt;&lt;p&gt;boundary condition is DPM_BC_REFLECT;&lt;\/p&gt;&lt;p&gt;}&lt;\/p&gt;&lt;p&gt;if (particle diameter &lt; D_filter_size)&lt;\/p&gt;&lt;p&gt;{&lt;\/p&gt;&lt;p&gt;boundary condition DPM_BC_INTERIOR;&lt;\/p&gt;&lt;p&gt;}&lt;\/p&gt;&lt;p&gt;For interior DPM, it&#8217;s just like the &#8220;porous jump&#8221; boundary, interior for DPM, and particles can pass through the boundary without anything happening (&#8220;filter&#8221; surface in my figure).&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-223271","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=\"if (particle diameter &gt; D_filter_size){boundary condition is DPM_BC_REFLECT;}if (particle diameter &lt; D_filter_size){boundary condition DPM_BC_INTERIOR;}For interior DPM, it&#039;s just like the &quot;porous jump&quot; boundary, interior for DPM, and particles can pass through the boundary without anything happening (&quot;filter&quot; surface in my figure).\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/223271\/\" \/>\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 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