{"id":382816,"date":"2024-09-16T19:52:11","date_gmt":"2024-09-16T19:52:11","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/want-to-know-how-to-set-a-specific-concentration-in-an-area\/"},"modified":"2024-09-16T19:52:11","modified_gmt":"2024-09-16T19:52:11","slug":"want-to-know-how-to-set-a-specific-concentration-in-an-area","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/want-to-know-how-to-set-a-specific-concentration-in-an-area\/","title":{"rendered":"Want to know how to set a specific concentration in an area"},"content":{"rendered":"<p>&lt;p&gt;Hi, i&#8217;m a beginner to ansys fluent, i&#8217;m trying to simulate the following system:&lt;\/p&gt;&lt;p&gt;i have a titanium nanotube in which there is a solution of water + sodium naproxene, at the exit of the nanotube i have just water.&lt;\/p&gt;&lt;p&gt;what i want to simulate is the mass diffusion of this molecule outside the nanotube and in the water.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;the problem is that i&#8217;m not able to set the concentration of the molecule in the nanotube at a fixed value at time=0, in this way i&#8217;ll be able to appreciate the elution of the molecule from the nanotube in the water. Actually i&#8217;m only able to set a constant value of the concentration at the wall or in a area by using a patch, by this way the concentration is kept constant for all the simulation and doesn&#8217;t change in the nanotube, even if the diffusion and elution occurs.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-382816","topic","type-topic","status-publish","hentry","topic-tag-mass-diffusion","topic-tag-species-diffusion"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["456699","199"],"_bbp_author_ip":["158.47.222.124"],"_btv_view_count":["215"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["382816"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","456699"],"_bbp_voice_count":["2"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["383306"],"_bbp_last_active_id":["383306"],"_bbp_last_active_time":["2024-09-20 10:37:05"]},"test":"albertocaracutagmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/382816","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\/382816\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=382816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}