Because the accurate determination of thermal conductivity is a demanding task (often not recognized by either designers or vendors), methods, based on the measurement of another physical property that is uniquely coupled to thermal conductivity, are very challenging. One such method is based on the so-called Wiedemann-Franz Law, which links the thermal conductivity to the … [Read more...]
Low Noise Axial Fan Applications
There are three basics to creating low-noise axial fan applications: airflow path design initial fan design analysis and correction of specific acoustical responses in the physical model Each is important and contributes to the overall sound levels of the program. Figure 1. Representative flow-versus-pressure characteristic of system air path.A flow-versus-pressure … [Read more...]
Temperature of in-line array of electronic components simulated by rectangular blocks
An earlier work by the authors (Molki et al., 1995) discussed the adiabatic heat transfer coefficient of rectangular blocks situated in an in-line array. In real circuit boards, heat is generated by a number of electronic components. The temperature of each component is affected by two factors, self-heating and thermal wake effect. Self-heating is the temperature rise due to … [Read more...]
Thermal challenges in the telecom and networks industry
Figure 1: Telecom Equipment Operating EnvironmentsThere are two main reasons for doing thermal design in the telecommunication industry. The first is to ensure functionality of the equipment and system when subjected to extreme environments. The second is to ensure high dependability of the network. While doing thermal design, many challenges must be kept in mind: the … [Read more...]
Computer-related thermal packaging at the millenial divide
Examples of state-of-the-art thermal management solutions at the dawn of the 21st century (left to right): a TCM module, a high-density heat sink, and an ultra performance, low profile fan-sink. Thermal management has served as a key enabling technology in the development of advanced microelectronic systems and has facilitated many of the "Moore's Law" [Moore, G.E., 1975] … [Read more...]
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