- **FLUENT**
(*https://www.cfd-online.com/Forums/fluent/*)

- - **Bug: Surface Integral->Sum w/cut plane and x-face-area**
(*https://www.cfd-online.com/Forums/fluent/65245-bug-surface-integral-sum-w-cut-plane-x-face-area.html*)

Bug: Surface Integral->Sum w/cut plane and x-face-areaAn FYI,
Given: A custom field function: d-area = abs(x_face_area) Reports: Surface Integrals Report Type: Sum Field Variable: Custom field functions darea (defined as abs(x-face-area) ) Surfaces: A defined constant-x plane cut through the domain Yields: Zero erroneously Other information: Writing the data shows that each face equals zero to machine precision. Report Type: Area yields the correct (non-zero) area. Report Type: Integral w/Custom Fields Function unity (defined as 1) also yields the correct area. Report Type: Sum on a boundary surface yields the correct area. Conclusion: Using Sum with a custom field function which needs x-area-face on a defined surface yields erroneous results. Use Report Type: Integral instead. Note: the integrand of interest is actually (rho * Vx ^ 2 * d-area) |

All times are GMT -4. The time now is 23:05. |