{"id":312049,"date":"2023-10-18T12:04:00","date_gmt":"2023-10-18T12:04:00","guid":{"rendered":"\/forum\/forums\/topic\/surface-reaction-udf-units\/"},"modified":"2023-10-18T12:25:19","modified_gmt":"2023-10-18T12:25:19","slug":"surface-reaction-udf-units","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/surface-reaction-udf-units\/","title":{"rendered":"Surface Reaction UDF units"},"content":{"rendered":"<p>Hi everyone,<\/p>\n<p>I am trying to model particle surface reactions with custom kinetics using a DEFINE_SR_RATE UDF. However, it is unclear to me which units this UDF (or rather the solver) expects for the returned reaction rate.<\/p>\n<p>From the example in the UDF Guide it seems to me as if it is kmol\/m3\/s while from the Theory Guide I would expect kg\/s (eq. 7.73). Which are the correct units?<\/p>\n<p>Thank you!<\/p>\n<p>Chris<\/p>\n","protected":false},"template":"","class_list":["post-312049","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi everyone,I am trying to model particle surface reactions with custom kinetics using a DEFINE_SR_RATE UDF. 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However, it is unclear to me which units this UDF (or rather the solver) expects for the returned reaction rate.From the example in the UDF Guide it seems to me as if it is kmol\/m3\/s while from the Theory\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/surface-reaction-udf-units\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-10-18T12:04:00+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-10-18T12:25:19+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Surface Reaction UDF units | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi everyone,I am trying to model particle surface reactions with custom kinetics using a DEFINE_SR_RATE UDF. 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