-
-
August 12, 2024 at 8:49 pm
Saeed
SubscriberHello,
Im doinf a cfd-dem simulation of a mixing tank. I think the results I am getting are not realistic. as you can see in the picture below, some of the particles pile up at bottom center or top center of the tank. my particles have density lest than the fluid so the should all go up. I have tried different time steps for both fluent and Rocky also different particle size and same thing happens.Â
my cfd model is standard K-epsilone with scalable wall function and production limiter on.Â
ThanksÂ
-
August 13, 2024 at 8:47 am
Rob
Forum ModeratorIs the mixer running?Â
-
August 13, 2024 at 1:58 pm
Saeed
SubscriberDear Rob,Â
Thank you for your reply.
Yes it is running, even if it was not running the particles at the bottom should have a upward movment.Â
ThanksÂ
-
August 13, 2024 at 2:05 pm
Rob
Forum ModeratorShould they? What is the downwards fluid velocity relative to the Stokes terminal velocity?
-
August 13, 2024 at 2:20 pm
Saeed
Subscriberthank you for your reply.
The particle density is less thank fluid so it should be going up not to stay there and pile up.
The fluid z velocity in that region is about -0.2 m/s and stokes terminal velocity is -0.122 so their fraction is 1.63 .Â
Â
-
August 13, 2024 at 2:27 pm
Rob
Forum ModeratorDownflow is 0.2m/s?Â
-
August 13, 2024 at 2:37 pm
Saeed
Subscriberyes its almost 0.2 m/sÂ
-
August 13, 2024 at 3:17 pm
Rob
Forum ModeratorAnd the terminal (floating) velocity is 0.122m/s?Â
-
- You must be logged in to reply to this topic.
- How do I get my hands on Ansys Rocky DEM
- Non-Intersected faces found for matching interface periodic-walls
- Unburnt Hydrocarbons contour in ANSYS FORTE for sector mesh
- Help: About the expression of turbulent viscosity in Realizable k-e model
- Script Error
- Facing trouble regarding setting up boundary conditions for SOEC Modeling
- convergence issue for transonic flow
- Running ANSYS Fluent on a HPC Cluster
- Point exception in erosion calculation
- Errors with multi-connected bodies using AQWA
-
1972
-
886
-
599
-
591
-
366
© 2025 Copyright ANSYS, Inc. All rights reserved.