Terminal velocity and drag coefficient for spherical particles

Haim Kalman, Erez Matana

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Empirical correlations and experimental works relating the drag coefficient (CD) of spheres to the Reynolds number (Re) and Re to the Archimedes number (Ar) were reviewed with a focus on the correlations applicable to the entire Re range. In addition, experiments with various spherical particles and fluids for the entire range of Re were conducted using high-speed video and added to the literature data. One of the correlations from the literature for Re-Ar and a modified correlation for CD–Re were found to best fit the experimental results. The analysis also established new correlations for Re–Ha (a non-dimensional number for velocity not including particle size) and CD–Ar. The latter is easier to use than the common CD–Re curve.

Original languageEnglish
Pages (from-to)181-190
Number of pages10
JournalPowder Technology
StatePublished - 1 Jan 2022


  • Archimedes number
  • Drag coefficient
  • Reynolds number
  • Spherical particles
  • Terminal velocity

ASJC Scopus subject areas

  • General Chemical Engineering


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