Memory usage using cfdemSolverIB

Hi,
I am trying to use the cfdemSolverIB to conduct the resolved modeling. But I found the cfdemSolverIB results in huge memory usage. I used 24 cores with 96G memory, but only about 200 particles I can inject in my simulation. More particle injection will stop the simulation (memory use up). Very grateful for any clues why memory usage is so huge with cfdemSolverIB or/and how I can fix this issue.