The traditional pathway for development of thermal management technologies for electronics has been to analyze using heat transfer theory augmented by computational tools such as finite difference or finite element methods, CFD tools, or thermal management system simulation tools, sometimes in tandem with prototype system fabrication and testing. Combining recently available … [Read more...]
The Critical Radius in Cylindrical Systems
In the current world of heat transfer analysis, most work is performed with numerical simulation. However, there are analysis methods, which are faster and useful for early estimates or even design guidance, that are beneficial to thermal engineers. A recent ECM article [1] mentioned the concept of the critical radius when discussing the cooling/insulating effect of wire … [Read more...]
Thermocouple Transient Behavior
Previous articles in this series described how thermocouple wire size [1] and thermocouple attachment method [2] can affect steady state temperature measurements. This article briefly discusses how these factors can affect the transient response of thermocouples when used to monitor temperatures that change value over time. Bare Thermocouple Junction Before addressing … [Read more...]
Tech Brief: Thermocouple Attachment
The previous article in this series on thermocouples described how the size of the thermocouple wire could affect its accuracy [1]. This is particularly true if the wire is exposed to high convection coefficients. This article addresses a separate issue, namely the degree to which the attachment method impacts thermocouple readings. As it turns out, once again the … [Read more...]
How Many Ways Can Temperature Affect Performance and Reliability of Electronic Systems?
Thermal management in high performance electronics has become a leading challenge for design and reliability engineers. Harsh temperatures can be caused either by harsh operational conditions (high power dissipation), or by harsh environmental conditions. Both require adequate thermal management to ensure that the product temperature stays within acceptable limits. High … [Read more...]
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