scholarly journals Modelling and thermography measurements of thermal wake effect in electronic components

2004 ◽  
Author(s):  
M. Felczak ◽  
B. Więcek
Keyword(s):  
Electronic Components ◽  
Wake Effect ◽  
Thermal Wake

A Correlation for Heat Transfer and Wake Effect in the Entrance Region of an In-Line Array of Rectangular Blocks Simulating Electronic Components

1995 ◽  
Vol 117 (1) ◽  
pp. 40-46 ◽  
Author(s):  
M. Molki ◽  
M. Faghri ◽  
O. Ozbay
Keyword(s):  
Heat Transfer ◽  
Entrance Region ◽  
Working Fluid ◽  
Mean Deviation ◽  
Transfer Coefficients ◽  
Wake Effect ◽  
Mean Velocity ◽  
Heat Transfer Coefficients ◽  
Wake Effects ◽  
Thermal Wake

An experimental investigation is carried out to study heat transfer in the entrance region of an array of rectangular heated blocks. The focus of the work is on the entrance heat transfer coefficients and the associated thermal wake effects. The experiments were performed with air as the working fluid. The geometric parameters of the array were varied in the range identified with B/L = 0.5, S/L = 0.128–0.33, and H/L = 0.128–1. The Reynolds number, based on the height above the blocks and the fluid mean velocity in the bypass channel, ranged from 3000 to 15,000. The adiabatic heat transfer coefficients and thermal wake effects are correlated for the entrance region. These correlations are incorporated into a user-friendly FORTRAN program, which can be used by the engineers to predict the working temperatures of the components of circuit boards with similar layout. A typical computer output indicated that the mean deviation between the measured and predicted temperatures is 11.0 percent.

scholarly journals Experimental and Numerical Analysis of Electronics Heat Sink

1970 ◽  
Vol 3 (2) ◽  
Author(s):  
Ahmad F. Ismail, Mirghani I. Ahmed, and Yousif A. Abakr
Keyword(s):  
Heat Sink ◽  
Experimental Testing ◽  
Electronic Cooling ◽  
Percentage Error ◽  
Electronic Components ◽  
Testing Methods ◽  
Electronic Board ◽  
Computational Fluid Dynamics Cfd ◽  
Thermal Wake ◽  
Good Agreement

Cooling of electronic components continues to attract many research and development activities towards achieving an effective way of cooling. Computational fluid dynamics (CFD) tools may be considered as a cheap substitute for expensive experimental testing methods. In this work the cooling of a simulated electronic board was modeled using FLUENTTM CFD software, and experimental procedures were followed to validate the estimated results, and to understand the factors that would affect the software capability to predict the actual measured values. Results showed good agreement between the simulation and experimental results. The software was found to be capable to predict the exact values at the locations where the temperature values were similar to the board mean temperature. The maximum percentage error was found to be limited to 4.7%, and the capability of the software to estimate the exact measured values was found to be affected by the function of thermal wake generation. Keywords: CFD, Electronic cooling, Heat sink, Simulation

The Thermal Wake of Kauai Island: Satellite Observations and Numerical Simulations*

2008 ◽  
Vol 21 (18) ◽  
pp. 4568-4586 ◽  
Author(s):  
Yang Yang ◽  
Shang-Ping Xie ◽  
Jan Hafner
Keyword(s):  
Numerical Simulations ◽  
Diurnal Cycle ◽  
Satellite Observations ◽  
Trade Wind ◽  
Strong Wind ◽  
Wake Effect ◽  
Cloud Band ◽  
Warm Advection ◽  
Early Afternoon ◽  
Thermal Wake

Abstract Island thermal effects on the trail cloud band over the central North Pacific are investigated for the lee of Hawaii using satellite observations and a regional atmospheric model. The trail cloud band develops around noon and peaks in cloudiness in the early afternoon. The analysis of numerical simulations of the Kauai wake suggests that a dynamically induced convergence zone forms in the lee of Kauai and Oahu (maximum elevation at 1.5 and 1.2 km, respectively) under the trade wind flow. The island thermal effect significantly modulates the island wake and creates a diurnal cycle of development and decay in the lee cloud band. As solar radiation heats up the island from morning to afternoon, warm air moves downstream (warm advection) from the island in the wake zone, increasing the air temperature, decreasing the air pressure, and enhancing low-level wind convergence in favor of the formation of the trail clouds. Conversely the cold advection during night suppresses cloud formation in the wake. The warm advection and the convergence in the wake increase with the upstream trade wind strength, consistent with satellite observations that the cloudiness increases in the wake under strong wind conditions in the afternoon. The similarity in the trail cloud and its diurnal cycle between Kauai and Oahu suggests that the thermal wake effect is quite common. The conditions for such a thermal wake are discussed.

Finite Element Analysis applied on the Cooling of Electronic Components

2018 ◽  
Author(s):  
Luís Henrique Carnevale da Cunha ◽  
Gustavo Rabello dos Anjos ◽  
Norberto Mangiavacchi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Electronic Components ◽  
Element Analysis
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