I am trying to understand the heat transfer ( LaEuScalarTemp.C ) and scalar transport (scalarGeneralExchange.C) model in CFDEM-coupling. In the line 385 of scalarGeneralExchange.C file, particle Reynolds number have been calculated as
Rep = dscaled*magUr*voidfraction/nuf;
Here "voidfraction" appears in the expression for Reynolds number.
However, in the line 257 of LaEuScalarTemp.C file, particle Reynolds number have been calculated as
Rep = ds*magUr/nuf;
Here "voidfraction" does not appear in the expression for Reynolds number. It will be a great help for me if anyone can explain me why the expressions for Rep is different in these two files. Thank you and happy new year.