Numerical investigation of pressure drop and heat transfer in pin fin heat sink and micro channel pin fin heat sink

Saravanan, V.; Umesh, C.K.; Hithaish, Doddamani; Seetharamu, K.N.

doi:10.18280/ijht.360136

Cited by 11 publications

(3 citation statements)

References 26 publications

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“…The secondary flow enables the core flow to mix with the fluid near the wall to improve heat transfer efficiency. The cross-flow generated by the vortex can further reduce the thickness of the boundary layer (Saravanan et al, 2018;Al Muallim et al, 2020). The ribs on the side walls have a limited effect on the boundary layer of the flow channel, and the cooling performance is improved more significantly by the addition of ribs or vortex generator configuration at the bottom (Datta et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Cooling performance in a minichannel heat sink with different triangular pin-fins configurations

Zhao

Sun²,

Xia

et al. 2023

Front. Energy Res.

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With the continuous progress of automotive new energy technology, the motor has become an important part of the power system, and the heat dissipation of insulated-gate bipolar transistors (IGBT) determines the reliability of the power system. Minichannel structure can be added to the thermal management system of new energy vehicles to improve the heat transfer capacity. Due to the growth of the boundary layer in the smooth minichannel flow channel, the cooling performance improvement was limited. Pin-fins and rib structures were used to break the boundary layer and increased the heat transfer area to enhance the heat transfer capacity. In this study, a numerical simulation model of minichannel with triangular pin-fins with different rotation angles was established and calculated using the SST k-omega method. The temperature field, velocity field, pressure, and vortex distribution under different configurations were discussed in detail. The jet area formed by the prism wall and the side wall of the minichannel would impact the wall and reduce the growth of the boundary layer. However, the stagnation area generated in the center and corner will reduce the improvement of heat transfer capacity. The thermo-hydraulic characteristics of different configurations at different Reynolds numbers (Re), such as Nusselt number (Nu), Darcy friction resistance coefficient (f), and performance evaluation criterion (PEC), were analyzed. As Re increased, the best and worst configurations changed, the best configuration changed from the 90°–120° structure to the 120°–120° structure, and the worst configuration changed from the 75°–60° to the 60°–60° structure. When the Re = 663, the influence of the front and rear rotation angle on the cooling performance was explored. When the rotation angle was closer to 60°, the cooling performance of the minichannel was better. And the closer the rotation angle was to 120°, the cooling performance was better. This has a reference effect on the design of minichannel heat sinks.

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Section: Introductionmentioning

confidence: 99%

Cooling performance in a minichannel heat sink with different triangular pin-fins configurations

Zhao

Sun²,

Xia

et al. 2023

Front. Energy Res.

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“…The understanding of thermal transport in complex geometries with discrete heat sources is of major importance. The applications include disposal of nuclear wastes, electronic circuits, geothermal areas, food processing industries and cooling of electronic components [1][2][3][4][5]. A thorough understanding of thermal transport in complex geometries with discrete heat source is essential in the design of above equipment.…”

Section: Introductionmentioning

confidence: 99%

Heatline Visualization for Thermal Transport in Complex Solid Domains with Discrete Heat Sources at the Bottom Wall

Tinnaluri¹,

Devanuri²

2019

IJHT

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The current work attempts to numerically investigate the thermal transport for twodimensional solid complex geometries with two discrete heat sources at the bottom wall. The computational grid has been developed in GAMBIT and then linked to the in-house code which is based on collocated grid based Finite Volume Method (FVM). In this study five different domains viz. square, trapezoidal, skewed, S-curve and H-curve have been considered and the thermal conductivity has been varied from 0.25 to 10 W/m K. A concept of Bejan's heatline visualization has been considered for the analysis of thermal transport. The heatlines along with isotherms are observed to provide a better insight for the understanding of thermal transport in considered complex geometries. With the domain thermal conductivity of 0.25 W/m K the maximum hot spot temperature is noted to be 443 K (square) and minimum of 436 K (S-curve). It is observed that with the increase in thermal conductivity from 0.25 to 10 W/m K, the maximum temperature in the domain decreased by 23.71 % for skewed and 20.77 % for S-curve geometries.

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“…Using particle swarm algorithm, they found that the thickness of fin is the most effective parameter on entropy generation. Also, in 2018, Saravanan et al [20] investigated pressure drop and heat transfer in a micro pin fin heat sink and a micro channel pin fin heat sink with different pin shapes including circular and square. In this study pin fins with staggered arrangement were studied numerically in Reynolds numbers ranging 100 to 900.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of thermal and hydraulic performance of a micro plate-pin fin heat sink

Mehrabi¹,

Kheradmand²,

Farivar³

2018

IJHT

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In this paper, thermal and hydraulic performance of a plate-pin fin heat sink with air as cooling agent is investigated. The heat sink is subjected to a heat flux at a strip of its base. The numerical approach was validated using available experimental data. Hydraulic parameters including pressure drop and coefficient of friction and thermal parameters including Nusselt number and thermal resistance were considered for performance evaluations. In order to improve thermal performance of the heat sink, a single pin was inserted into each channel. The influence of the pin geometry, its dimensions, and location were studied. Various pin cross sections, including circular, elliptic and airfoil were studied. To investigate the effect of the circular pin location, seven different positions were considered for two sizes of the pin and the optimum location was derived. The simulation was carried out for five different Reynolds numbers in the range of 2730 to 6300. It was found that pin insertion in the center of the heated region is an effective way to improve the thermal performance; also, using a larger pin results in a lower thermal resistance and a greater pressure drop. To evaluate overall performance, the heat sink effectiveness factor which represents a combination of the hydraulic and thermal performance was defined and corresponding figures were provided to derive an optimum geometry.

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Numerical investigation of pressure drop and heat transfer in pin fin heat sink and micro channel pin fin heat sink

Cited by 11 publications

References 26 publications

Cooling performance in a minichannel heat sink with different triangular pin-fins configurations

Cooling performance in a minichannel heat sink with different triangular pin-fins configurations

Heatline Visualization for Thermal Transport in Complex Solid Domains with Discrete Heat Sources at the Bottom Wall

Numerical simulation of thermal and hydraulic performance of a micro plate-pin fin heat sink

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