Optimization Study for a Parallel Plate Impingement Heat Sink

2006 ◽  
Vol 128 (4) ◽  
pp. 311-318 ◽  
Author(s):  
Amit Shah ◽  
Bahgat G. Sammakia ◽  
K. Srihari ◽  
K. Ramakrishna
Keyword(s):  
Pressure Drop ◽  
Shape Optimization ◽  
Thermal Performance ◽  
Heat Sink ◽  
Parallel Plate ◽  
Central Zone ◽  
Operating Characteristics ◽  
Optimization Study ◽  
Heat Sink Design ◽  
Increased Pressure

A previous study by the authors on fin-shape optimization of a plate fin heat sink has concluded that a depopulated central zone, just under the center of the fan, provides a better thermal performance compared to the heat sink geometries with fin material under the fan. This study extends the previous work by investigating the effect of removal of fin material from the end fins, the total number of fins, and the reduction in the size of the hub fan. From this study, it is concluded that the removal of fin material from the end fins results in a better thermal and hydraulic performance of the heat sink. The reduction in the size of the hub causes a more uniform distribution of air inside the heat sink. The increase in the number of fins indicates a slightly better thermal performance, accompanied by a considerably increased pressure drop. Finally, a new optimal heat sink design has been reported by employing the actual fan operating characteristics.

Numerical Optimization Study for a Parallel Plate Impingement Heat Sink

2003 ◽  
Author(s):  
Amit Shah ◽  
Bahgat Sammakia ◽  
Hari Srihari ◽  
Koneru Ramakrishna
Keyword(s):  
Thermal Performance ◽  
Heat Sink ◽  
Numerical Optimization ◽  
Single Unit ◽  
Parallel Plate ◽  
Central Zone ◽  
Operating Characteristics ◽  
Optimization Study ◽  
Heat Sink Design ◽  
Increased Pressure

This paper presents the numerical analysis of an impingement heat sink designed for use with a specific blower as a single unit. Shat et al. (2002) had performed a fin shape optimization study for the same heat sink and concluded that a de populated central zone, just under the center of the fan, provides a better thermal performance as compared to the heat sink geometries with fin material under the fan. The results presented in this paper are an extension to the study described in Shah et al. (2002). The effects of removal of fin material from the end fins, the total number of fins, and, the reduction in the size of the hub have been investigated. The removal of fin material from the end fins results in the better thermal and hydraulic performance. The reduction in the size of the hub causes a more uniform distribution of air inside the heat sink. The increase in the number of fins indicates a slightly better thermal performance, accompanied by a considerably increased pressure drop. Finally a new optimal heat sink design has been reported. This design is shown to perform better as compared to the original heat sink design under the actual fan operating characteristics.

Improving the Performance of an Impingement Heat Sink by Modifying the Fin Shapes

2009 ◽  
Author(s):  
Sravan Gondipalli ◽  
Bahgat Sammakia ◽  
Gamal Refai-Ahmed
Keyword(s):  
Pressure Drop ◽  
Pressure Gradient ◽  
Thermal Performance ◽  
Heat Sink ◽  
Parallel Plate ◽  
Heat Sources ◽  
Optimal Heat ◽  
Microelectronic Devices ◽  
The Impact ◽  
Heat Sink Design

As the power dissipated by advanced microelectronic devices continues to increase, the demand for reliability also increases. This increases the requirements on the thermal performance of every part of the system, including the heat sink. One of the objectives of this study is to examine the effect of the shape of the heat sink fins on the thermal performance of the system. The pressure gradient at the center of the heat sink, near the base, tends to be high. This significantly reduces the airflow at that location and, hence, decreases transport in that region. Different fin shapes and airflow rates have been studied with the objective of searching for an optimal heat sink design that would improve the thermal performance without increasing the pressure drop across the heat sink. Parallel plate fins have been investigated by removing fin material from the region near the center of the heat sink along the length and height of the fins. The study also examines the impact of uniform and non-uniform heat sources in the device upon the overall system thermal performance. Twenty one heat sink designs with different cuts were simulated and compared and an improved heat sink design was proposed by eliminating the fin material at the center of the heat sink, thereby enhancing its thermal performance.

Numerical Prediction of Thermal Performance of Water Cooled Multi-Stack Microchannel Heat Sink with Counterflow Arrangement

2011 ◽  
Vol 8 (1) ◽  
pp. 16-22 ◽  
Author(s):  
Pradeep Hegde ◽  
Mukesh Patil ◽  
K. N. Seetharamu
Keyword(s):  
Finite Element ◽  
Pressure Drop ◽  
Thermal Resistance ◽  
Thermal Performance ◽  
Heat Sink ◽  
Element Model ◽  
Channel Length ◽  
Computational Time ◽  
Microchannel Heat Sink ◽  
Method Performance

Thermal performance of a water cooled multistack microchannel heat sink with counterflow arrangement has been analyzed using the finite element method. Performance parameters such as thermal resistance, pressure drop, and pumping power are computed for a typical counterflow heat sink with different number of stacks. The temperature distribution in a typical multistack counterflow microchannel heat sink is obtained for different numbers of stacks and plotted along the channel length. A parametric study involving the effects of number of stacks and channel aspect ratio on thermal resistance and pressure drop of the heat sink is done. The finite element model developed for the analysis is simple and consumes less computational time.

scholarly journals Thermal Performance Analysis for Optimal Passive Cooling Heat Sink Design

2017 ◽  
Vol 15 (2) ◽  
pp. 883
Author(s):  
Nur Warissyahidah Badrul Hisham ◽  
Fatimah Sham Ismail ◽  
Muhammad Azmi Ahmed Nawawi
Keyword(s):  
Performance Analysis ◽  
Thermal Performance ◽  
Heat Sink ◽  
Passive Cooling ◽  
Heat Sink Design

“Heat Shield”—An Enhancement Device for an Unshrouded, Forced Convection Heat Sink

2006 ◽  
Vol 128 (2) ◽  
pp. 172-176 ◽  
Author(s):  
Suzana Prstic ◽  
Avram Bar-Cohen
Keyword(s):  
Pressure Drop ◽  
Thermal Performance ◽  
Heat Sink ◽  
Thin Sheet ◽  
Heat Sinks ◽  
Heat Shield ◽  
Air Cooling ◽  
Thermal Enhancement ◽  
Thin Sheet Metal ◽  
Forced Air

The inherent advantages of forced air cooling have led to the widespread use of fully and partially shrouded heat sinks for the thermal management of high power microprocessors. The superior thermal performance that is achievable in the fully shrouded configuration is accompanied by a significant pressure drop penalty. The concept introduced in the current study, employs a thin sheet-metal “heat shield,” placed around a partially shrouded heat sink, to channel the flow directly into the heat sink. A combined numerical and experimental study has shown that the use of this “heat shield” can substantially enhance heat sink thermal performance, in a channel geometry and air flow range typical of commercial chip packages; making it comparable to that of a fully shrouded heat sink, with a substantially lower pressure drop (∼50%). In addition, this thermal enhancement device can be easily retrofitted into existing systems; improving performance without major channel and/or fan modifications.

Analysis of Liquid-Cooled Heat Sink Used for Power Electronics Cooling

2010 ◽  
Author(s):  
Hemin Hu ◽  
Jiahui Zhang ◽  
Xiaoze Du ◽  
Lijun Yang
Keyword(s):  
Pressure Drop ◽  
Thermal Performance ◽  
Heat Sink ◽  
Rectangular Channel ◽  
Geometry Optimization ◽  
Electronics Cooling ◽  
Volumetric Flow Rate ◽  
Cold Plate ◽  
Channel Density ◽  
Cooling Channels

In the paper, liquid-cooled heat sink (cold plate) used for power electronic cooling is numerically studied. Thermal and hydraulic performances are analyzed, with the emphasis on geometrical construction of cooling channels. Two heat transfer enhancing channel shapes are investigated, such as alternating elliptical channel (AE-C) and alternating rectangular channel (AR-C). Their performances are compared with that of three traditional straight channel shapes, as straight circular channel (SC-C), straight elliptical channel (SE-C), and straight rectangular channel (SR-C). Coolant pressure drop and heat sink surface temperature are calculated using computational fluid dynamics (CFD) approach, with water as coolant. It is found that, when channel hydraulic diameter and coolant volumetric flow rate are fixed, the heat sinks with alternating rectangular channel have the highest thermal performance with a little penalty on pressure drop. Geometry optimization is studied for AR-C. The effects of channel density are investigated, and it is found that higher channel density can improve both thermal and hydraulic performances. A case study is conducted for a heat sink with uniform and discrete heat sources. It is concluded that alternating channels provide excellent thermal performance and should be taken into application for cold plate.

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