[loving_cfd]

Hello, my dears,
I want to obtain the gradient of one uds.
Using the C_UDSI_G macro, I find the deviation is too large in the near-wall region.
In the help document, it is described that "The gradients stored in variables with the _G suffix are non-limited values and if used to reconstruct values within the cell (at faces, for example), may potentially result in values that are higher (or lower) than values in the surrounding cells".
However, when I try to program C_UDSI_RG, error is reported, indicating there is no such a function.
Is there any method to get a more accurate gradient and a second-order gradient?