Hi All, I would like to access the initial velocity values at each point for subsequent time steps in order to calculate the L2 error of my simulation with time:
L2_error = sqrt( sum_cells( ( U-U_ini )^2 + ( V-V_ini )^2 )/ sum_cells(U_ini^2+V_ini^2) ). I have followed the instructions given in here, and it works fine for one time step. E.g., when these U, V is the final time. Furthermore, I would like to track this value L2_error with time. To do that, I have opened a .vtm file with all the time steps included, and followed the same steps as before. However, after using the Append Attributes filter, the velocity parameters U_t, V_t (the new names I am using) do not update their value with time. I am not sure if I am missing something. Thank you very much for your time, Henrik
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