Conjugate Heat Transfer Analysis on a Raspberry Pi
A heat sink is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, where it is dissipated away from the device. This way, the heat sinks plays a crucial role in the temperature regulation for the device, preventing overheating. Heat sinks are commonly used in electronics, where cooling is one of the most important aspects.
The Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and in developing countries. 
Just for all electronics, a Raspberry Pi designer needs to make sure the product get proper cooling. This is where a heat sink is integrated.
SimScale allows heat sink designers to test different designs in parallel, 100% in the browser, giving flexibility, collaboration options and access to high computing power — up to 32 cores —from a normal PC or laptop. This way they can make optimization decisions based on the simulations’ results and deliver the best possible design. We dedicated one page to all advantages of online simulation software.
Thermal Analysis of a Raspberry Pi Heat Sink
This Conjugate Heat Transfer analysis was performed on a Raspberry Pi enclosure having a processor with a mounted heat sink over it. The focus of this simulation is to study the cooling performance to determine if it meets the cooling requirement of the Raspberry Pi.
In terms of results, this study clearly shows that the cooling is still quite effective under passive environment with the use of the designated heat sink.
The contours below show the temperature on a 3D model cutout (left), temperature on 2D slice (top right) and velocity distribution plot (bottom right).