Reply To: CFD-DEM, different viscosity

[Saeed]

Yes, all parameters are the same in all simulations. I will explain my set up and I will be grateful if you help me with it. 

it is a two-way coupling with CFD time step of 1e-4 and K-e model , production limiter and scalable wall functions are activated. for Dem , possion ratio is 0.25 and young modulus is 1e6 N/M2. material interactions are default. in two way coupling , turbulance disperssion is activated and drag force model is Huilin and Gidaspow. lift force model is Mei. the simulation ran for 10s where it was stable and did not change anymore after 7s. DEM time step is 4.67e-6

Thanks