{"id":396123,"date":"2024-12-03T16:15:50","date_gmt":"2024-12-03T16:15:50","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/396123\/"},"modified":"2024-12-03T16:15:50","modified_gmt":"2024-12-03T16:15:50","slug":"396123","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/396123\/","title":{"rendered":"Reply To: Air Heat Transfer Coefficient &#8211; SteadyStateThermal Simulation &#8211; ANSYS Mechanical"},"content":{"rendered":"<p>&lt;p&gt;It appears you have mainly natural convection (no fan blowing air over the bodies.)&nbsp; So it would be interesting to see if the handbook values for natural convection produce the correct temperature.&nbsp; &nbsp;The fly-out menu for the film coefficient in Mechanical has an option to &#8220;Import Temperature Dependent&#8230;&#8221;&nbsp; One of the temperature dependent options is for stagnant air and a horizontal cylinder.&nbsp; This option uses the formula below.&nbsp; It could be close to your case.&nbsp;&nbsp;&lt;\/p&gt;&lt;p&gt;Stagnant Air, Horizontal Cylinder, Turbulent Case. Using h = 1.24(Tw-Tb)**1\/3, GrPr greater than 10e9. Ref. Holman, &#8220;Heat Transfer,&#8221; McGraw Hill, 5th ed., p285.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-396123","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"It appears you have mainly natural convection (no fan blowing air over the bodies.) So it would be interesting to see if the handbook values for natural convection produce the correct temperature. The fly-out menu for the film coefficient in Mechanical has an option to &quot;Import Temperature Dependent...&quot; One of the temperature dependent options is\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/396123\/\" \/>\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=\"Reply To: Air Heat Transfer Coefficient \u2013 SteadyStateThermal Simulation \u2013 ANSYS Mechanical | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"It appears you have mainly natural convection (no fan blowing air over the bodies.) So it would be interesting to see if the handbook values for natural convection produce the correct temperature. The fly-out menu for the film coefficient in Mechanical has an option to &quot;Import Temperature Dependent...&quot; One of the temperature dependent options is\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/396123\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-12-03T16:15:50+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-12-03T16:15:50+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Air Heat Transfer Coefficient \u2013 SteadyStateThermal Simulation \u2013 ANSYS Mechanical | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"It appears you have mainly natural convection (no fan blowing air over the bodies.) 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So it would be interesting to see if the handbook values for natural convection produce the correct temperature. 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