{"id":160893,"date":"2021-08-01T17:25:38","date_gmt":"2021-08-01T17:25:38","guid":{"rendered":"\/forum\/forums\/topic\/different-mesh-significantly-alters-fluent-results\/"},"modified":"2021-08-03T10:51:43","modified_gmt":"2021-08-03T10:51:43","slug":"different-mesh-significantly-alters-fluent-results","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/different-mesh-significantly-alters-fluent-results\/","title":{"rendered":"Different mesh significantly alters Fluent results"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi everyone,<\/p>\n<p>I am working on a fluent simulation to model natural convection heating inside a bag of liquid. I was able to successfully simulate it and get accurate results, then I changed the geometry slightly. The changes to the geometry were not significant at all, the general size and shape are still the same. It is relatively simple geometry too; just an elliptical cylinder that tapers inwards towards the top.<\/p>\n<p>However, now I noticed that my results significantly vary with different mesh sizes. For example, if I have 150k+ elements in my mesh my results are around 20-30% different than when I have 100-130k elements. And if I have over 250k elements in my mesh the simulation fails. <\/p>\n<p>Why does the mesh have such a significant impact on the results?<\/p>\n","protected":false},"template":"","class_list":["post-160893","topic","type-topic","status-closed","hentry","topic-tag-fluent","topic-tag-mesh-generation"],"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 working on a fluent simulation to model natural convection heating inside a bag of liquid. I was able to successfully simulate it and get accurate results, then I changed the geometry slightly. The changes to the geometry were not significant at all, the general size and shape are still the same. It\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/different-mesh-significantly-alters-fluent-results\/\" \/>\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=\"Different mesh significantly alters Fluent results | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi everyone,I am working on a fluent simulation to model natural convection heating inside a bag of liquid. I was able to successfully simulate it and get accurate results, then I changed the geometry slightly. The changes to the geometry were not significant at all, the general size and shape are still the same. It\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/different-mesh-significantly-alters-fluent-results\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-08-01T17:25:38+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-08-03T10:51:43+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Different mesh significantly alters Fluent results | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi everyone,I am working on a fluent simulation to model natural convection heating inside a bag of liquid. I was able to successfully simulate it and get accurate results, then I changed the geometry slightly. 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