{"id":373926,"date":"2024-07-29T07:23:03","date_gmt":"2024-07-29T07:23:03","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/gas-solid-eulerian-with-heterogenous-reaction\/"},"modified":"2024-07-29T07:38:59","modified_gmt":"2024-07-29T07:38:59","slug":"gas-solid-eulerian-with-heterogenous-reaction","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/gas-solid-eulerian-with-heterogenous-reaction\/","title":{"rendered":"gas-solid Eulerian with heterogenous reaction"},"content":{"rendered":"<p><span style=\"font-size: 12pt\">I am working on a CFD simulation for CO2 capture using K2CO3 adsorbent in a 2D bubbling fluidized bed. Here are the details of my simulation:<\/span><\/p>\n<p><span style=\"font-size: 12pt\">&#8211; Using Eulerian CFD with the Gidaspow Drag model (Transient simulation).<\/span><br \/><span style=\"font-size: 12pt\">&#8211; Modeling species transport with reaction.<\/span><br \/><span style=\"font-size: 12pt\">&#8211; The reaction is: CO2 + H2O + K2CO3 &#8211;&gt; 2KHCO3.<\/span><br \/><span style=\"font-size: 12pt\">My questions are:<\/span><br \/><span style=\"font-size: 12pt\">1. I modeled this as a heterogeneous reaction in multiphase modeling. Is this correct?<\/span><br \/><span style=\"font-size: 12pt\">2. I didn&#8217;t use a volumetric reaction. Is this okay?<\/span><br \/><span style=\"font-size: 12pt\">3. I made a solid mixture of K2CO3 and KHCO3 to define KHCO3 as the product. Is this the right approach?<\/span><br \/><span style=\"font-size: 12pt\">4. My simulation is diverging as soon as it starts. I&#8217;ve tried changing the model settings, but it didn&#8217;t help.<\/span><br \/><span style=\"font-size: 12pt\">5. I&#8217;m not sure how to correctly model this reaction.<\/span><\/p>\n<p><span style=\"font-size: 12pt\">Thank you&nbsp;<\/span><\/p>\n<p>Error:&nbsp;<\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: vof-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: pressure correction<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: gas-phase-species-0<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: gas-phase-species-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: solid-phase-species-0<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: vof-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: pressure correction<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: gas-phase-species-0<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: gas-phase-species-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: solid-phase-species-0<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: vof-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: pressure correction<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: gas-phase-species-0<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: gas-phase-species-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: solid-phase-species-0<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Divergence detected in AMG solver: vof-1<\/span><\/p>\n<p><span style=\"font-size: 10pt\">Error at host: floating point exception<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 10pt\">Error: floating point exception<\/span><\/p>\n","protected":false},"template":"","class_list":["post-373926","topic","type-topic","status-closed","hentry","topic-tag-fluent-ansys-1","topic-tag-convergenceerror-1","topic-tag-floating-point-error","topic-tag-floating-point-exception"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am working on a CFD simulation for CO2 capture using K2CO3 adsorbent in a 2D bubbling fluidized bed. Here are the details of my simulation:- Using Eulerian CFD with the Gidaspow Drag model (Transient simulation).- Modeling species transport with reaction.- The reaction is: CO2 + H2O + K2CO3 --&gt; 2KHCO3.My questions are:1. 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Here are the details of my simulation:- Using Eulerian CFD with the Gidaspow Drag model (Transient simulation).- Modeling species transport with reaction.- The reaction is: CO2 + H2O + K2CO3 --&gt; 2KHCO3.My questions are:1. 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