{"id":347369,"date":"2024-01-30T19:04:07","date_gmt":"2024-01-30T19:04:07","guid":{"rendered":"\/forum\/forums\/topic\/permeability-and-momentum-loss\/"},"modified":"2024-01-30T19:04:07","modified_gmt":"2024-01-30T19:04:07","slug":"permeability-and-momentum-loss","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/permeability-and-momentum-loss\/","title":{"rendered":"Permeability and momentum loss"},"content":{"rendered":"

Hi!<\/p>\n

I’m trying to define pressure losses in a thermal storage system using a porous medium, but I’m having difficulties defining its properties. When comparing the results obtained through Ansys Fluent with those obtained from the Ergun equation, they don’t match up.<\/p>\n

<\/p>\n

My system is defined with a porosity of 0.38, density, and viscosity at room temperature, and a particle diameter of 0.006m, with a storage tank length of 0.54m. The velocity is 1.65 m\/s in the packed bed. k1=150 and k2=1.75 constant.<\/p>\n

I’ve been reviewing the Ansys guides and I believe the issue lies in calculating the fluid inertia loss. Does anyone know how the coefficient should be calculated?<\/p>\n

<\/p>\n

I have tried this equation, but the units do not match. Because it has to be 1\/m.<\/p>\n

<\/p>\n

Thank you very much.<\/p>\n","protected":false},"template":"","class_list":["post-347369","topic","type-topic","status-closed","hentry"],"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