{"id":313040,"date":"2023-10-24T13:30:27","date_gmt":"2023-10-24T13:30:27","guid":{"rendered":"\/forum\/forums\/topic\/writing-an-expression-involving-concentration-gradient\/"},"modified":"2023-10-24T13:30:27","modified_gmt":"2023-10-24T13:30:27","slug":"writing-an-expression-involving-concentration-gradient","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/writing-an-expression-involving-concentration-gradient\/","title":{"rendered":"writing an expression involving concentration gradient"},"content":{"rendered":"<p>Hi<\/p>\n<p>I am trying to evaluate the following equation using custom field functions<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/24-10-2023-1698154202-mceclip0.png\"><\/p>\n<p>but getting stuck because of concentration gradient. Does anyone know how to evaluate concentration gradient using expression or custom field functions so that above equation can be calculated.<\/p>\n","protected":false},"template":"","class_list":["post-313040","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=\"HiI am trying to evaluate the following equation using custom field functionsbut getting stuck because of concentration gradient. 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