dynamic viscosity for sand
 

hi
i am modeling channel with 3 phases (air+water+sediment). when i select depressed solid for sediment, one error occurred. it want a dynamic viscosity for sand that is material of sediment.
i don't know what value i should use.
is there method for calculate it? or what is the value of it?

Guess you have defined sand as a solid. For a solid it is not reasonable to define a dynamic viscosity. Subsequently CFX does not allow it.

To solve your problem you have to think about your physics and how to model it.

hi
sand is not defined in material, because of it i defined it. in definition of sand, it don't need dynamic viscosity but when i select depressed solid for sand, CFX need dynamic viscosity for it.

I also need that viscosity of sand for creating new inert material for injection of eulerian multiphase flow but i don't know how to get it or measure it