Under the focusing characteristics of parabolic trough solar collectors, enhancing secondary flow intensity and shifting the secondary flow vortex center towards the bottom of the absorber can extend the lifespan of the absorber and improve thermal performance. This study combines the Monte Carlo Ray Tracing method (MCRT) and the Finite Volume Method (FVM) to investigate the fluid flow and heat transfer characteristics inside the absorber under non-uniform thermal boundary conditions. The effects of inlet flow rate (Vin), inlet temperature (Tin...
