Dear all,
I am new to sedifoam. I simulated xiaocase3 in cases folder in sedifoam directory (/sedifoam/cases/auto-testing/test-cases/xiaocase3),the photo from paraview result is attached, I want to know what is Uc and Ur, I found that Ua, Ub is the velocity for particle and carrier, but I do not know what are Uc and Ur. Does anybody know what are Ur and Uc and what is carrier? is carrier fluid surrounding

the particle?