Drag diameter

Settling Stokes s diameter Drag diameter Free-fall diameter... [Pg.52]

At a low Re3uiolds number, the drag diameter equals the surface diameter of convex particles. For this case, the Stokes diameter, defined as the free-fall diameter in the laminar flow region, is related to sphericity as follows ... [Pg.59]

Hawksley [17] showed that this was equivalent to stating that the drag diameter closely approximates the surface diameter. [Pg.316]

For non-re-entrant particles the drag diameter (dfl is the same as the surface diameter d and the Stokes diameter is defined as ... [Pg.317]

Since the drag diameter is otherwise indeterminable, it is usual in practice to assume that, in the Stokes region, it is equal to the surface diameter. This holds at low Reynolds numbers but as Reynolds number increases, d, > d, For irregular, compactly shaped particles the range of settling diameters is limited (Figure 6.3). [Pg.317]

The ratio of the Sauter mean diameter to the drag diameter appears as a shape factor. It is noted that for non-spherical particles or for systems with a particle size distribution, the various shape factors may not be unity. However, for a distribution of spherical particles, the shape factor, is unity regardless... [Pg.558]

Specific heat at constant pressure Diffusion coefficient, drag, diameter Acceleration due to gravity Mass flux parameter... [Pg.428]

Drag Diameter Diameter of a sphere having the same resistance to motion as the panicle in a fluid of the same viscosity and at the same velocity... [Pg.45]

Drag diameter Resistance to motion in the same fluid at the same velocity... [Pg.10]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...