{"id":392604,"date":"2024-11-04T15:22:09","date_gmt":"2024-11-04T15:22:09","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-transport-mixing-simulation-setting-concentration-of-tracer\/"},"modified":"2024-11-04T15:22:09","modified_gmt":"2024-11-04T15:22:09","slug":"species-transport-mixing-simulation-setting-concentration-of-tracer","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-transport-mixing-simulation-setting-concentration-of-tracer\/","title":{"rendered":"Species Transport Mixing Simulation &#8211; Setting Concentration of Tracer"},"content":{"rendered":"<p>&lt;p&gt;Hi I am modelling mixing of a tracer in water (two liquids miscible with one another) in a batch stirred tank based on an experiment using the species transport model. I have followed the usual steps which include:&lt;\/p&gt;<\/p>\n<ol>\n<li>Computing flow field for primary liquid (water) using steady state solver &amp; standard k-epsilon turbulence model.<\/li>\n<li>Activate species transport model, create mixture template for tracer &amp; liquid. Assume tracer has same properties as bulk liquid &amp; change diffusivity from default value to diffusivity of tracer in liquid.<\/li>\n<li>Patch small volume of tracer into computational domain.<\/li>\n<li>Freeze flow field, switch off flow &amp; turbulence equations (solve only for one species transport equation). Activate transient solver.<\/li>\n<li>Create monitors of concentration at several locations in the tank, run simulation and estimate mixing time(s).<\/li>\n<\/ol>\n<p>&lt;p&gt;Prior to starting my simulation, I notice after patching the initial concentration of tracer (t=0) is ~1.64 kmol\/m^3. For the experiment, the concentration of tracer is 0.51 kmol\/m^3. How do I change the concentration of tracer so it exactly matches the concentration used in the experiment?&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/04-11-2024-1730733686-Screenshot 2024-11-04 152056.jpg\" alt=\"\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392604","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["282802","199"],"_bbp_author_ip":["129.11.113.4"],"_btv_view_count":["401"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["392604"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","282802"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["392608"],"_bbp_last_active_id":["392608"],"_bbp_last_active_time":["2024-11-04 15:43:57"]},"test":"ll17s5rleeds-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392604","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\/392604\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}