{"id":355470,"date":"2024-03-05T19:32:57","date_gmt":"2024-03-05T19:32:57","guid":{"rendered":"\/forum\/forums\/reply\/355470\/"},"modified":"2024-03-05T19:32:57","modified_gmt":"2024-03-05T19:32:57","slug":"355470","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/355470\/","title":{"rendered":"Reply To: spg question"},"content":{"rendered":"<p>&lt;p&gt;Hi Jiazhi,&nbsp;&lt;\/p&gt;&lt;p&gt;Try with the following pointers by giving importance to the first point as in the follows&nbsp;&lt;\/p&gt;&lt;p&gt;The way to avoid the negative volume error in SPG is to try the following changes in the SPG section card.&lt;\/p&gt;<\/p>\n<ol>\n<li>Turn off erode and mass scale in the control timestep ( most recommended).<\/li>\n<li>Increase the dilation&nbsp; DX, DY, and DZ parameters to say 1.8<\/li>\n<li>Set the SMSTEP = 5 and increase pdamp to -0.01.&nbsp; ( 8th parameter in the row 3 of section SPG card)<\/li>\n<\/ol>\n<p>&lt;p&gt;Cheers, Ram&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-355470","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=\"Hi Jiazhi, Try with the following pointers by giving importance to the first point as in the follows The way to avoid the negative volume error in SPG is to try the following changes in the SPG section card.Turn off erode and mass scale in the control timestep ( most recommended).Increase the dilation DX, DY, and DZ\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/355470\/\" \/>\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 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