{"id":394422,"date":"2024-11-20T02:38:38","date_gmt":"2024-11-20T02:38:38","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-independence-study-for-non-premixed-oxy-coal-combustion\/"},"modified":"2024-11-20T02:38:38","modified_gmt":"2024-11-20T02:38:38","slug":"mesh-independence-study-for-non-premixed-oxy-coal-combustion","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-independence-study-for-non-premixed-oxy-coal-combustion\/","title":{"rendered":"mesh independence study for non-premixed oxy-coal combustion"},"content":{"rendered":"<p>&lt;p&gt;I am running a 2-d RANS case for non-premixed oxy-coal combustion in an elevated pressure environment.&lt;\/p&gt;&lt;p&gt;the models used: kw-sst for turbulence, species transport with finite rate\/eddy dissipation model for combustion, DPM model for particle, DO model for radiation.&lt;\/p&gt;&lt;p&gt;3 meshes are generated in ICEM; quality check is good.&lt;\/p&gt;&lt;p&gt;the temperature, TKE, volatile concentration are quite close for these mesh. but heat of reaction profile shows big differences between coarse and medium\/fine mesh.&lt;\/p&gt;&lt;p&gt;is this caused by finite rate\/eddy dissipation model, because this model use a piece-wise function to get the reaction rate?&lt;\/p&gt;&lt;p&gt;Thank you.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/20-11-2024-1732069755-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-394422","topic","type-topic","status-publish","hentry","topic-tag-2021-r1-1","topic-tag-2d_dpm-1","topic-tag-2d-axisymmetric","topic-tag-coal-combustion","topic-tag-DiscreteOrdinateModel-1","topic-tag-eddy-dissipation-model","topic-tag-k-omega-sst","topic-tag-mesh-independence-study","topic-tag-non-premixed-combustion","topic-tag-reynoldsaveragenavierstokes-1","topic-tag-species-transport"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am running a 2-d RANS case for non-premixed oxy-coal combustion in an elevated pressure environment.the models used: kw-sst for turbulence, species transport with finite rate\/eddy dissipation model for combustion, DPM model for particle, DO model for radiation.3 meshes are generated in ICEM; 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