TABLE 4.

Estimates of D or D · Sh and δ (in parentheses) for experiments with various sphere sizesa

Sphere sizeD (δ)Agar spheres [flow ∼ 0.3 cm s−1D·Sh (δ)]
Glass spheres stagnantAgar spheres stagnant
Small1.1 × 10−5 (1.4 × 10−4)0.9 × 10−5 (1.5 × 10−4)5.0 × 10−5 (1.7 × 10−4)
Medium1.1 × 10−5 (1.5 × 10−4)1.8 × 10−5 (1.1 × 10−4)5.7 × 10−5 (2.9 × 10−4)
Large1.2 × 10−5 (1.4 × 10−4)3.5 × 10−5 (1.9 × 10−5)5.6 × 10−5 (4.3 × 10−6)
  • a Small, medium, and large spheres measured as 0.15-, 0.25-, and 0.38-cm radii (glass spheres) or 0.12-, 0.17-, and 0.28-cm radii (agar spheres).