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Drag Coefficient Apparatus (SMT-FM-21)

The apparatus has been designed to introduce students to the fundamental characteristics of the behaviour of particle/fluid systems, in particular the relationship between the drag coefficients of falling particles and their Reynolds’ number value. Particles covering a range of sizes and densities are supplied. The experiments are conducted by allowing single particles to fall through a number of different liquids contained in vertical Transparent tubes. Blockage effects are reduced to a minimum as the largest particle used has a projected area of only 1% of the tube cross-section. The rate of fall of the particles is determined by timing their passage between two marks on the walls of the glass tubes. 

Panel with back lit by a fluorescent lamp.

Transparent Tubes:

  • Material: PMMA
  • QTY=02
  • O.D =75mm
  • I.D =79MM
  • Length = 1m

Weight: 25kg Approx.

  • Influence of the following parameters on the settling velocity of spheres:
  •     diameter of the sphere
  •     density of the sphere
  •     density of the fluid
  •     viscosity of the fluid
  • Two transparent vertical glass tubes, back lit by a fluorescent lamp for ease of viewing.
  • Guide to aid the insertion of particles at the top of the tubes.
  • Sliding valves to aid the removal of particles from the bottom of the tubes.
  • The equipment is supplied with sets of spheres of different sizes and materials, plus two streamlined shapes.