Experimental investigation was conducted to study the thermal performance and thermal resistance factor of staggered mini-duct heat sinks.With Reynolds number increasing

the performance of both staggered ducts and straight ducts are improved

and the former is more evident and significant.The thermal resistance factor has an exponential relation with Re;and at the same Re

the factor of staggered ducts is about 18% lower than that of straight ducts.The temperature profile of heat sink bottom is distinctly non-uniform

mainly caused by the fluid temperature rise along the flow

and it fluctuates spatially and temporally.The flow in staggered ducts would lose its stability at about Re 700

much lower than normal cases.