I met two problems when I studied a tutorial “Pulsating fluidized bed (TFM): Impose fluctuating inlet velocity”.
I had downloaded and read the PDF file from this link 3.11. Advanced Tutorials — MFiX 21.3 documentation, before I began to set through the GUI. Fortunately, the 2D two fluid method (TFM) case ran well. However, when changed it to a 3D DEM one, the solver showed an error message below.
(1) I am not sure how to deal with this issue. Is it caused by the change of dimension (from 2D to 3D) or solver (from TFM to DEM). Do I need to revise the code files? Which lines in code files are wrong?
(2) Which lines in the code files mean the assignment of gas velocity components u_g, v_g and w_g? For example, the gas velocity has three components. How can I confirm that the values in data_kf_0001.txt have been assigned to the y component of the gas velocity? Is the velocity assignment part only in usr1.f (in the zip file below).
My case is attached here in a zip file. Pulsating_fluid_bed_2D_DEM.zip (9.4 KB)