Stratification in poured granular heaps

Article metrics


The stratification of poured granular mixtures into layers according to particle size has long been identified as an important mechanism by which such materials segregate1,2. The implications of this effect for the process industries have also been discussed3,4. Makse et al.5 suggestthat stratification takes place only when there is a marked difference in the shape of large and small grains; specifically, when the angle of repose of the coarse phase is much greater than that of the fines. Our experiments show that stratification can occur in the absence of such heterogeneity of particle shapes within the mixture.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Figure 1


  1. 1

    Williams, J. C. Univ. Sheffield Fuel Soc. J. 14, 29–34 (1963).

  2. 2

    Williams, J. C. Powder Technol. 2, 13–20 (1968).

  3. 3

    Carson, J. W., Royal, T. A. & Goodwill, D. J. Bulk Solids Handling 6, 139–144 (1986).

  4. 4

    Carson, J. W., Royal, T. A. & Goodwill, D. J. Chem. Eng. Prog. 92(11), 72-80 (1996).

  5. 5

    Makse, H. A., Havlin, S., King, P. R. & Stanley, H. E. Nature 386, 379–382 (1997).

  6. 6

    Tüzün, U. & Arteaga, P. Chem. Eng. Sci. 47, 1619–1634 (1992).

  7. 7

    Drahun, J. A. & Bridgwater, J. Powder Technol. 36, 39–53 (1983).

  8. 8

    Standish, N., Yu, A. B. & He, Q. L. Powder Technol. 68, 187–193 (1991).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.