Time-resolved refractive index matched PIV measurements inside and downstream of a 90° bend

The flow in a 90° bend with Rc /D = 1.5 is studied at a Reynolds number of 34,800 to characterize the unsteady motions that may affect mass transfer in the latter part of the bend and downstream pipe where differences have been reported. Two-component, time-resolved measurements were performed on the axial symmetry plane and on cross sectional planes in the bend and up to 1D downstream of the bend using refractive index matched Particle Image …