These are the default values (set in model/des/des_init_namelist.f). If you ‘re-select’ Field-to-particle and particle-to-field (which makes the GUI options appear as it did originally), you now get the following change to the input deck
there’s not an answer for this, at least not a good one. i tried do some testing on this awhile ago but it’s difficult to assess this in the absence of discretization error (or at least minimal discretization error w/ dx < 1) because the width is restricted to 2dx (as implemented). based on some very preliminary work using the gaussian diffusion kernel, I would recommend not exceeding an upper limit of about 5dp (if 5dp <= 2dx). lower limit could go down to zero and you just get back the PCM. I thought 0.93dp might make a good value so that (for concentration) particles become cubes of maximum random packing. But, honestly, I didn’t see any better behavior/agreement in any of my tests with 0.93dp, 1dp, 2dp… FWIW, I use a default value of 1.5dp and i have absolutely no justification for that over any other value.
Error 2200: The DES implementation of the stiff chemistry solver only supports explicit coupling (DES_EXPLICITLY_COUPLED).
Does that mean I have to enable explicit coupling of interphase quantities? I try to simulate gasification in spouted bed. Will this option affect calculation result?