Fig. 1. Schematic diagram of structure. (a) Package structure; (b) Liquid cooling chamber structure; (c)-(f) Diagram of arrangement of pin-fins

Fig. 2. The velocity of liquid nitrogen in the different liquid cooling chamber. (a) Cavity structure; (b) Micro channel structure; (c) Pin-fins structure

Fig. 3. Flow velocity diagram of liquid nitrogen flow in a liquid cooling chamber with different shapes and arrangements. (a) Circular inline pin-fins; (b) Circular staggered pin-fins; (c) Square staggered pin-fins

Fig. 4. Distribution of streamlines in a single pin-fin structure (Re=8400). (a) Square pin-fin; (b) Circular pin-fin

Fig. 5. Flow velocity diagram of liquid nitrogen in a liquid cooling chamber with staggered arrangement of different size pin-fins. (a) Square, 1.0 mm; (b) Square, 3.0 mm; (c) Square, 4.0 mm; (d) Circular, 1.0 mm; (e) Circular, 3.0 mm; (f) Circular, 4.0 mm

Fig. 6. Distribution diagram of convective heat transfer coefficient in pin-fins structure with different shapes, sizes, and arrangements

Fig. 7. Streamline and temperature distribution diagram in the liquid cooling chamber with the enhanced heat exchange structure. (a) Streamline distribution diagram; (b) Temperature distribution diagram