{"id":27875,"date":"2017-09-27T11:19:28","date_gmt":"2017-09-27T11:19:28","guid":{"rendered":"\/forum\/forums\/topic\/set-up-a-heat-source-in-cfx-in-a-subdomain-that-results-in-a-constant-temperature\/"},"modified":"2017-09-27T11:19:28","modified_gmt":"2017-09-27T11:19:28","slug":"set-up-a-heat-source-in-cfx-in-a-subdomain-that-results-in-a-constant-temperature","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/set-up-a-heat-source-in-cfx-in-a-subdomain-that-results-in-a-constant-temperature\/","title":{"rendered":"Set up a heat source in CFX in a subdomain that results in a constant temperature"},"content":{"rendered":"<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">You can set a CEL expression for the heat source such as: HeatIn = HCoef * (Treq &#8211; T) where Treq is the required temperature and HCoef is a positive valued power density coefficient (units = [W m^-3 K^-1]). The size of HCoef determines how fast your heat source reacts to temperature changes. You want HCoef to be large enough to give you the behaviour you want but not so large that it makes the solver struggle. Setting the source coefficient to be -HCoef should help significantly with convergence.<\/span><\/p>\n","protected":false},"template":"","class_list":["post-27875","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=\"You can set a CEL expression for the heat source such as: HeatIn = HCoef * (Treq - T) where Treq is the required temperature and HCoef is a positive valued power density coefficient (units = [W m^-3 K^-1]). The size of HCoef determines how fast your heat source reacts to temperature changes. You want\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/set-up-a-heat-source-in-cfx-in-a-subdomain-that-results-in-a-constant-temperature\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Set up a heat source in CFX in a subdomain that results in a constant temperature | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"You can set a CEL expression for the heat source such as: HeatIn = HCoef * (Treq - T) where Treq is the required temperature and HCoef is a positive valued power density coefficient (units = [W m^-3 K^-1]). The size of HCoef determines how fast your heat source reacts to temperature changes. You want\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/set-up-a-heat-source-in-cfx-in-a-subdomain-that-results-in-a-constant-temperature\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2017-09-27T11:19:28+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2017-09-27T11:19:28+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Set up a heat source in CFX in a subdomain that results in a constant temperature | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"You can set a CEL expression for the heat source such as: HeatIn = HCoef * (Treq - T) where Treq is the required temperature and HCoef is a positive valued power density coefficient (units = [W m^-3 K^-1]). The size of HCoef determines how fast your heat source reacts to temperature changes. 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