Abstract
This study investigates the thermal and hydraulic performance of heat sinks with micro pin-fins in circular and
rectangular configurations using mono and hybrid nanofluids. Motivated by the need for efficient cooling solutions
in high-performance electronic devices, the research explores novel combinations of metallic oxide (Ag,
MgO) and carbon-based nanoparticles (GNP, MWCNT) in nanofluids. A constant volume fraction of micro pinfins
and nanoparticles was maintained to assess their effects on thermohydraulic performance. The method
involved experiments with aqueous nanofluids as coolants, measuring pressure drops (Δp) at the inlet and outlet.
Thermal performance was evaluated using metrics like thermal resistance (Rth), Nusselt number (Nuavg),
pumping power (PP), volumetric flow rate (Q), overall performance (OP), and performance evaluation criterion
(PEC). Results showed that GNP-based mono nanofluids significantly reduced Rth by 46.41% and increased Nuavg
by 60.54% and PEC by 62% in rectangular heat sinks compared to conventional water cooling. Comparisons
between rectangular and circular configurations revealed minimal Rth differences of 2.54% and 3.57%. GNPdispersed
nanofluids outperformed other coolants, with the rectangular configuration achieving a higher PEC
of 1.62 versus 1.52 for the circular configuration at Δp = 820 Pa. The conclusions suggest that rectangular pinfins
with GNP-based nanofluids offer superior thermohydraulic performance. The key outcomes from current
study have significant contribution in enhancing the cooling efficiency of advanced electronic systems.
rectangular configurations using mono and hybrid nanofluids. Motivated by the need for efficient cooling solutions
in high-performance electronic devices, the research explores novel combinations of metallic oxide (Ag,
MgO) and carbon-based nanoparticles (GNP, MWCNT) in nanofluids. A constant volume fraction of micro pinfins
and nanoparticles was maintained to assess their effects on thermohydraulic performance. The method
involved experiments with aqueous nanofluids as coolants, measuring pressure drops (Δp) at the inlet and outlet.
Thermal performance was evaluated using metrics like thermal resistance (Rth), Nusselt number (Nuavg),
pumping power (PP), volumetric flow rate (Q), overall performance (OP), and performance evaluation criterion
(PEC). Results showed that GNP-based mono nanofluids significantly reduced Rth by 46.41% and increased Nuavg
by 60.54% and PEC by 62% in rectangular heat sinks compared to conventional water cooling. Comparisons
between rectangular and circular configurations revealed minimal Rth differences of 2.54% and 3.57%. GNPdispersed
nanofluids outperformed other coolants, with the rectangular configuration achieving a higher PEC
of 1.62 versus 1.52 for the circular configuration at Δp = 820 Pa. The conclusions suggest that rectangular pinfins
with GNP-based nanofluids offer superior thermohydraulic performance. The key outcomes from current
study have significant contribution in enhancing the cooling efficiency of advanced electronic systems.
| Original language | English |
|---|---|
| Article number | 103005 |
| Number of pages | 16 |
| Journal | Thermal Science and Engineering Progress |
| Volume | 55 |
| Early online date | 22 Oct 2024 |
| DOIs | |
| Publication status | E-pub ahead of print - 22 Oct 2024 |
Bibliographical note
Copyright © 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ ).Data Access Statement
The authors do not have permission to share data.Keywords
- Heat Sink
- Heat and Fluid Flow
- Micro Pin-Fin
- Mono and Hybrid Nanofluid
- Thermohydraulic Performance