{"id":371040,"date":"2024-07-09T02:15:07","date_gmt":"2024-07-09T02:15:07","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/?post_type=topic&p=371040"},"modified":"2024-07-09T02:15:16","modified_gmt":"2024-07-09T02:15:16","slug":"eulerian-wall-film-breaks-plate-heat-exchanger-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/eulerian-wall-film-breaks-plate-heat-exchanger-model\/","title":{"rendered":"Eulerian Wall Film Breaks Plate Heat Exchanger Model"},"content":{"rendered":"

Hello,<\/p>\n

I am currently trying to model a segment of a plate heat exchanger, i.e. two air streams separated by a plate (one hot and one cold). The hot air is humid and is meant to condense on the plate, which should be shown by the Eulerian wall film model. <\/p>\n

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I am using species transport, coupled with EWF to do this. However, I have run into an issue. The temperature fields, and species mass fraction fields should look have a triangular gradient, due to the cross flow configuration. When i turn EWF model off, the pattern looks correct, as below: <\/p>\n

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However, when i use EWF model, this pattern becomes uniform across the y axis for the film thickness, and temperature, as shown below:<\/p>\n

 <\/p>\n

Here are my settings for EWF:<\/p>\n

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For my boundary conditions, i have set an inital condition for the film thickness. And a phase change driven by the wall-boundary-layer model. <\/p>\n

To check convergence, i have been using report definitions for film height and film mass transfer. I dont believe this is a mesh issue either as i have tried various different meshes. Any help would be greatly appreciated, thank you.<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-371040","topic","type-topic","status-closed","hentry","topic-tag-air","topic-tag-condensation","topic-tag-eulerian-wall-film","topic-tag-fluid-solid-heat-transfer","topic-tag-multiphasefluids","topic-tag-species-transport"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t