Support

Trouble Report

For immediate assistance browse through our support center. You can find answers to many questions in just a few minutes.

If still experiencing problems, send us a report.

required
Why the math question?

Online Simulation

And More

Top Tags

  1. discrete element model
  2. DEM
  3. particle adhesion
  4. van der waals force
  5. hamaker constants
  6. particle-based computations
  7. statistical model building
  8. pharmaceutical informatics
  9. ontology
  10. molecular modeling
  11. information modeling
  12. roller compaction
  13. visualization
  14. knowledge-based system
  15. Johanson's model
  16. dry granulation
  17. surface roughness
  18. fast fourier transform
  19. decision support
  20. hopper flow
  21. thin films
  22. informatics
  23. product development
  24. crystal graph
  25. surface forces

Other

Roller Compactor

Posted 02 Jan, 2008 in Tools

Launch Tool

This tool is closed source.

Version 1.0 - published on 11 Jan. 2008
Contributor(s) Kamal Kuriyan
Purdue University
Description

Normal stresses for roller compaction are calculated from Johanson's rolling theory. The boundary between the slip and nip regions is calculated using Johanson's criterion, i.e. gradients of stress in slip and nip regions are assumed to be equal at nip angle. Shear stresses are calculated from the normal stresses using the method of Schonert and Sander.

roller
INPUT PARAMETERS:
Roll Gap / Roll Diameter,
Effective angle of friction,
Applied feed pressure,
Horizontal load ratio,
Compressibility.

OUTPUT:
Normal stress plot,
Shear stress plot,
Nip angle,
Slip region gradient plot,
Nip region gradient plot.

Credits

Model developed by A.J. Hlinak,
pharmaHub tool developed by K. Kuriyan,
Pharmaceutical Technology and Education Center, Discovery Park, Purdue Univeristy

References

Johanson, J. R. (1965) A rolling theory for granular solids. J Appl Mech, 32(4), 842-848.
Sommer, K., Hauser, G. (2003) Flow and compression properties of feed solids for roll-type presses and extrusion presses. Powder Technol, 130(1-3), 272-276.
Schonert, K., Sander, U. (2002) Shear stresses and material slip in high pressure roller mills. Powder Technol, 122(2-3), 136-144.

Cite this work

If you reference this work in a publication, please cite as follows:

  • Kuriyan, Kamal (2008), "Roller Compactor," http://pharmahub.org/resources/rollr?v=6.

    BibTex | EndNote