{"id":370939,"date":"2024-07-08T12:00:37","date_gmt":"2024-07-08T12:00:37","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/natural-ventilation-in-buildings_mesh-amp-xy-plots\/"},"modified":"2024-07-09T04:40:01","modified_gmt":"2024-07-09T04:40:01","slug":"natural-ventilation-in-buildings_mesh-amp-xy-plots","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/natural-ventilation-in-buildings_mesh-amp-xy-plots\/","title":{"rendered":"Natural Ventilation in Buildings_Mesh & XY Plots"},"content":{"rendered":"

Hi to the Ansys team,<\/span><\/p>\n

As a mechanical engineer, with a basic knowledge in Ansys Fluent, I have a project (thesis) related with Natural Ventilation in Buildings.<\/span>
In the attached jpeg images you will find the basic information of geometry and mesh.<\/span><\/span>

Other useful data:<\/span><\/span>
<\/span>Ø<\/span>  <\/span><\/span>Ansys version: 2024 R1<\/span><\/span>
<\/span>Ø<\/span> The reference paper I try to follow is the “Yi Jiang, Donald Alexander et.al. (2003), Natural Ventilation in Buildings…”<\/span><\/span>
<\/span>Ø<\/span> In the inlet I import a Ux velocity profile taken from the reference paper<\/span><\/span><\/p>\n

Ø<\/span> The mathematical model is k-ε STD and RNG      <\/span><\/span><\/span>Ø<\/span> Time: Steady<\/span><\/span>
<\/span>Ø<\/span> Uref = 8.4m\/sec<\/span><\/span>
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A major issue I face is the VELOCITY XY plot (Ux-normalized) divergence between my CFD results and the paper’s results (see the attached XY plot), especially in the boundary layers.<\/span><\/strong><\/p>\n

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Also, I think the mesh isn’t the best it can be.<\/span><\/strong>

My final goals\/targets are:<\/span><\/span>
– mesh independence test<\/span><\/span>
– implementation of other models (k-ω and Spalart-Almaras) based on the best mesh<\/span><\/span><\/span><\/p>\n

Could you give some advises in order to optimize the mesh<\/strong> and get better results<\/strong>??<\/span>

If there is any other data that you need for this project please tell me to provide more.<\/span><\/span><\/span>

<\/span>Thank you in advanced<\/span>
Nikos<\/span><\/span><\/span><\/p>\n","protected":false},"template":"","class_list":["post-370939","topic","type-topic","status-closed","hentry","topic-tag-3d-simulation","topic-tag-computational-fluid"],"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