Hello,
I am trying to simulate granular flow around a horizontal tubes of a particle heat exchanger and validate the results with the experimental results of Bartsch et at(https://www.sciencedirect.com/science/article/pii/S0038092X19300982) but I am getting zigzag velocity profile at any z plane but in their results they are getting a nice velocity profile. If anyone can help me regarding this problem then it will be thankful to you.
It would be also a great help if someone has validated it and can share the script file.