Experimental Study of Air-Cooled Parallel Plate Fin Heat Sinks with and without Circular Pin Fins between the Plate Fins

Abstract

Experiments were conducted to investigate forced convective cooling performance of an air cooled parallel plate fin heat sink with and without circular pin fins between the plate fins. The original parallel plate heat sink was fabricated consist of 9 parallel plates of length 53 mm with cross-sectional area of 1.4 mm in width by 20 mm height for each plate. The second heat sink has the same geometry of original one but with some circular pins between the plate fins. Thermal and hydrodynamics performances of the heat sinks have been assessed from the results obtained for the pressure drop, thermal resistance and overall performance with the free stream air velocity ranging from 4.7 to 12.5 m/s. Results show that the free stream air velocity has a significant effect on the thermal and hydrodynamics performance of the system. With increasing free stream velocity, the heat transfer coefficient increases and consequently the thermal resistance decreases while pressure drop increases due to higher inertial of fluid at higher velocities. Furthermore, at the same free stream air velocity the thermal resistance for the heat sink with circular pin is about 37.7% lower than that of the original heat sink.

TEG Heat Sink Heat Exchange Performance Evaluation and Validation Utilizing Thermographic Phosphor

“…This approach ensures stability for external flows while relatively accurately predicting the flow recirculation regions due to pressure gradients and flow separation points. The transport equations and eddy viscosity formula for the SST k-ω model are represented by equations (1) to (3).…”

“…In a study by Khudhur, Al-Zuhairy, and Kassim (2022) [2], CFD thermal analysis was conducted to explore heat transfer with various fin geometries in straight plate-fin heat sinks. Experiments performed by Pouryoussefi and Zhang (2015) [3] focused on evaluating forced convection cooling in an air-cooled parallel plate-fin heat sink, comparing configurations with and without circular pin fins. Raza and Paul (2019) [4] conducted an analysis on the impact of different shapes of perforated fins in enhancing heat sink effectiveness, highlighting that circular perforations resulted in the highest Nusselt number, indicating superior heat transfer.…”

Thermal Analysis of Semi-Circular Pin Fins for Application in Electronics Cooling

“…Maldonado and Roth (2012) simulates a three-dimensional two phase model for the snow-drift relocation around buildings utilizing deflected fins of various shapes and sizes and found that bent fins doesn't affect but it create shadows in relocated drifts. Pouryoussefi and Zhang (2015) has done number of experiments to examine the forced convective cooling performance of an air cooled parallel plate fin heat sink with and without insertion of cylindrical pin fins in between the plate fins. Authors found that the overall performance is higher for the case of plate fins heat sink with cylindrical fins.…”

Natural and forced convection heat transfer coefficients of various finned heat sinks for miniature electronic systems

“…Studies on the design of heat sinks under NC have been extensively carried out based on both experimental and numerical methods. 1–9 Starner and McManus 1 reported that the vertically inclined PFHS performed better than the horizontal or 45° inclined ones. Likewise, Guvenc and Yuncu 2 reported that the vertical PFHS performed better than the horizontal base unit.…”

“…8 on the PFHS showed that the flow pattern changed from a steady single-chimney to an oscillating sliding-chimney flow, or vice versa, depending on fin length. Pouryoussefi and Zhang 9 investigated the PFHS with circular pins between the rectangular base plates and showed that lower thermal resistance was obtained with the pins.…”