{"id":378102,"date":"2024-08-13T10:46:54","date_gmt":"2024-08-13T10:46:54","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/water-droplet-on-a-3d-surface\/"},"modified":"2024-08-19T16:14:04","modified_gmt":"2024-08-19T16:14:04","slug":"water-droplet-on-a-3d-surface","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/water-droplet-on-a-3d-surface\/","title":{"rendered":"Water Droplet on a 3D surface?"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I am fairly new to Ansys fluent (CFDs in general). I am trying to simulate a water droplet falling onto a 3D surface\/geometry. My hope is to run the simulation multiple times with changes to the geometry to understand the affect of surface geometry on how water interacts with it.&nbsp; I have been able to successfully create a droplet falling and hitting the bottom of fluid domain wall (similar to this tutorial: https:\/\/www.youtube.com\/watch?v=MN2zMoF3NyE). Where I am having trouble, is getting the droplet to interact with a 3D geometry that I create inside the domain. This is an example of what I have tried to make:&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/13-08-2024-1723545910-mceclip0.png\" width=\"758\" height=\"663\"><\/p>\n<p>I built the pillars in Spaceclaim and then surrounded them with an enclosure. The enclosure is set up with Share topology (I have also tried Merge). I give the interior structure a wall boundary condition, which also allows me to adjust the contact angle of that wall. Every time I run the simulation I end up with something like this:&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/13-08-2024-1723545921-mceclip1.png\" width=\"328\" height=\"289\"><img loading=\"lazy\" decoding=\"async\" style=\"font-size: 14pt\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/13-08-2024-1723545932-mceclip2.png\" width=\"287\" height=\"295\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/13-08-2024-1723545995-mceclip3.png\" width=\"333\" height=\"306\"><\/p>\n<p>Where the droplet seems to ignore the interior geometry and old interacts with the bounding box\/domain. I have been going back and forth with this for a week now and can&#8217;t seem to figure it out. Any thoughts or advice would be greatly appreciated.<\/p>\n<p>Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-378102","topic","type-topic","status-answered","hentry","topic-tag-ansys-fluent","topic-tag-boundary-conditions","topic-tag-droplet-behaviour-1","topic-tag-droplet-impact"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi,I am fairly new to Ansys fluent (CFDs in general). I am trying to simulate a water droplet falling onto a 3D surface\/geometry. My hope is to run the simulation multiple times with changes to the geometry to understand the affect of surface geometry on how water interacts with it. 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