{"id":278105,"date":"2023-04-06T10:03:18","date_gmt":"2023-04-06T10:03:18","guid":{"rendered":"\/forum\/forums\/topic\/question-about-chemistry-solver-drop-down-list-in-species-model\/"},"modified":"2023-04-06T10:03:18","modified_gmt":"2023-04-06T10:03:18","slug":"question-about-chemistry-solver-drop-down-list-in-species-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/question-about-chemistry-solver-drop-down-list-in-species-model\/","title":{"rendered":"Question about Chemistry Solver drop-down list in species model"},"content":{"rendered":"<p>Hello,<\/p>\n<p>&nbsp;<\/p>\n<p>I am going to activate a chemical reaction in Fluent. However, I am curious about the choice I should use.<\/p>\n<p style=\"margin-left: .5in;text-indent: -.25in\"><!-- [if !supportLists]--><span>1.<span style=\"font: 7.0pt 'Times New Roman'\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/span><\/span><!--[endif]-->When I learned a tutorial from youtube, there was a &#8220;non-explicit source&#8221; option. But my version, 2022R2, has a &#8220;non-direct source&#8221; option.<\/p>\n<p style=\"margin-left: .5in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/06-04-2023-1680774410-non explicit.JPG\" alt=\"\" width=\"522\" height=\"552\">&nbsp; &nbsp; <img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/06-04-2023-1680774496-non di.JPG\" alt=\"\"><\/p>\n<p style=\"margin-left: .5in\">Does &#8220;non-explicit source&#8221; is &#8220;non-direct source&#8221;?<\/p>\n<p style=\"margin-left: .5in\">&nbsp;<\/p>\n<p style=\"margin-left: .5in;text-indent: -.25in\"><!-- [if !supportLists]--><span>2.<span style=\"font: 7.0pt 'Times New Roman'\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/span><\/span><!--[endif]-->According to Ansys Fluent User&#8217;s Guide 2022R2 page 2249, I am confused about this phrase &#8220;If you want to make explicit use of chemistry source terms in the species transport equations, without a stiff-chemistry solver, select None &#8211; Direct Source.&#8221;<\/p>\n<p style=\"margin-left: .5in;text-indent: -.25in\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/06-04-2023-1680774609-Capture.JPG\" alt=\"\"><\/p>\n<p style=\"margin-left: .5in\">Could you please explain the meaning of &#8220;use of chemistry source terms in the species transport equations&#8221;?<\/p>\n<p style=\"margin-left: .5in\">Does chemistry source terms is the parameters we set in a reaction (below picture)?<\/p>\n<p style=\"margin-left: .5in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/06-04-2023-1680774836-cc.JPG\" alt=\"\" width=\"693\" height=\"507\"><\/p>\n<p style=\"margin-left: .5in;text-indent: -.25in\"><!-- [if !supportLists]--><span>3.<span style=\"font: 7.0pt 'Times New Roman'\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/span><\/span><!--[endif]-->What is the difference between &#8220;None &#8211; Direct Source&#8221; and &#8220;Stiff Chemistry Solver&#8221;?<\/p>\n<p style=\"margin-left: .5in;text-indent: -.25in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/06-04-2023-1680775347-s.JPG\" alt=\"\" width=\"579\" height=\"412\"><\/p>\n<p>Please advise.<\/p>\n<p>Best,<\/p>\n","protected":false},"template":"","class_list":["post-278105","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["248439","8124"],"_bbp_author_ip":["96.7.74.173"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1270"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["278105"],"_bbp_forum_id":["27792"],"_bbp_engagement":["8124","248439"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["279764"],"_bbp_last_active_id":["279764"],"_bbp_last_active_time":["2023-04-17 08:35:44"]},"test":"kasiditphagmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/278105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/278105\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=278105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}