Fig. 5 Schematic of stereo-vision from top view
By using the camera view calibrations and pre-set time between two
pulses of the laser, these two 2D vector maps from the displacement of
particles are then combined into one single 3D vector map (see Fig. 6).
The time averaged velocity profiles, radial, axial and tangential vector
distributions in Fig.7, were adopted to illustrate the flow structure at
five typical regions under Re=70 524 covering the separator chamber
described. The velocity u, v and w represent radial, axial and
tangential velocity, separately, in the pipe center measured region. The
direction for velocity u is from pipe center to the pipe wall within the
measurement planar, the velocity w is opposite to flow direction along
the pipe and the direction for velocity v is vertical to the measured
planar.