{"id":358223,"date":"2024-03-20T21:18:14","date_gmt":"2024-03-20T21:18:14","guid":{"rendered":"\/forum\/forums\/reply\/358223\/"},"modified":"2024-03-20T21:18:14","modified_gmt":"2024-03-20T21:18:14","slug":"358223","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/358223\/","title":{"rendered":"Reply To: Orszag Tang in ANSYS Fluent"},"content":{"rendered":"

<p>For recording purposes and future users, I figured out the diverging turbulent viscosity ratio was due to erroneous fluid transport properties. <\/p><p>After enabling the MHD Module in ANSYS, one will need to account for the magnetic permeability and electrical conductivity in the fluid properties under “create\/edit materials”. For the Orszag-Tang case, these values along with viscosity need to be set to 1. Density, Ratio of Specific Heats (cp\/cv) and Pressure need to be set judiciously such that the fluid’s speed of sound is equal to 1.0 through the relation: c^2 = gamma*P\/rho = 1 where c is the speed of sound, gamma the ratio of specific heats, P the pressure, and rho the density. More information can be found here<\/a> for boundary and initial conditions.<\/p><p> <\/p><p><\/p><p> <\/p><p>For the case of 1 set of periodic boundary conditions, the velocity gradient field looked like the following during initialization (when using patch utility). However, these results are still under development – note that the current results are no longer diverging. <\/p><p><\/p><p><\/p><\/p>\n","protected":false},"template":"","class_list":["post-358223","reply","type-reply","status-publish","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