Fig. 1. Schematic of LED sunflower radiator and computational domains. (a) Structural diagram of sunflower radiator; (b) side view of computational domain; (c) top view of computational domain

Fig. 2. Schematic of experimental system. (a) Experiment platform; (b) temperature measurement points

Fig. 3. Comparison between experimental and simulation results

Fig. 4. Effect of α on ΔTmax

Fig. 5. Effect of α on h and R. (a) Effect of α on h; (b) effect of α on R

Fig. 6. Effect of α on fluid velocity distribution at r=0.056 m. (a) α<0; (b) α>0

Fig. 7. Triangular grooves with different groove widths

Fig. 8. Effect of s on ΔTmax

Fig. 9. Effect of s on h and R

Fig. 10. Effect of s on fluid velocity distribution at r=0.056 m

Fig. 11. Triangular grooves with different groove depths

Fig. 12. Effect of d on ΔTmax

Fig. 13. Effect of d on h and R

Fig. 14. Effect of d on fluid velocity distribution at r=0.056 m