problem in eulerian and mixture model
 

I am working on slurry transportation in pipe, using multiphase method .
If I on multiphase model than select eulerian method
in material i select water and ash add from fluid database but in phase , there are two phase (1) primary (2) secondary
water is selected in primary but in secondary ash is not select or any solid materials is not shown to select.
Please solve my problem

try adding ash as fluid rather than particles (maybe)