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.