Forced convection in joined rectangular grooves numerical simulation of PIV and LDA measurements

The authors investigated the fluid motion in L-shaped geometries using a laser Doppler anemometer (LDA), particle image velocimetry (PIV), and computational techniques, in order to reveal details on the structure and stability of the trapped eddy system. The aim was to simulate the flows measured with the LDA and PIV and to assess the accuracy of the mathematical models used. The nonintrusive optical measurements of the fluid motion in joined rectangular grooves were numerically predicted using two models of turbulence. The structure of the vortex system within the geometries was determined, and its dependence on the aspect ratios of the groove was established. The performance of the turbulence models in simulating these complex flows is assessed