Experimental Investigation of Resonant Flow Pulsation in Mesochannels Embedded with Wavy Fins

The acute growth of the internet of things (IoT) has seen an rapid increase in Information Communication Technology (ICT) component density and power in an attempt to keep up with the staggering amount of data created and transferred daily. To increase performance, many data center (DC) facilities are moving to denser and more powerful servers to increase their data handling limits. This has led to standard DCs reaching a thermal bottleneck when air cooling techniques are utilized. The same problem was faced by high performance computing (HPC) facilities previously and solved by the adoption of liquid cooling technologies. The high heat fluxes found in modern CPUs require miniaturization of the cooling device to maintain temperatures within a safe limit. The scope of this work only extends to single phase flows, due to the added complexity of visualization and stable operation of two phase flows at the mesoscale. This work investigates the utilization of flow pulsation and embedded wavy fins within mesochannels ( Dh = 666μ m) for a low Reynolds number case ( Re=200). Pulsation waveforms including sinusoidal, triangular and two asymmetric ones are studied with frequencies of 16.55, 30, 40 and 50Hz corresponding to Womersley numbers of 3.6, 4.9, 5.7 and 6.3, respectively.