Determination of the Near Wall Flow of a Multi-Stage Tesla Diode Using PIV and PTV

Abstract

Particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are two popular methods to measure the velocity in complex geometries such as the Tesla valve. This paper provides an investigation on the application of a tessellation meshing method for interpolating non-uniform velocity vectors calculated using PTV. The procedure to apply this method containing mask generation and mesh study is described. The results are compared to the PIV results particularly where the near wall results are important. The result of the flow field calculated by the application of the tessellation method on the PTV results are presented for a two-stage Tesla valve operated in the range of Re = 100 to 600 both in forward and reverse configuration.

Investigating The Flow Structure Of Dean Vortices In A Curved Microchannel; Implementing 3D-µPTV Using FVM And Near Wall Data Refinement

“…To overcome this issue, a tessellation approach can be used. This approach maps the dispersed PTV velocity data onto an optimized high quality triangular node structure (Azadi et al, 2021) (Saffar et al, 2021).…”