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Consider the heat sink shown in gray in the image below. It is used to dissipate the heat from an LED and a thin interface layer shown in green below. The CAD file containing the LED + interface + heat sink will can be provided downloaded here.

• LED and heat sink are made of Aluminum: k=186 W/(m C)
• For the interface: k=48 W/(m C)
• Heat generated by LED: 3.3×10⁷ W/m³  
• Ambient temperature: 40 C
• Convection coefficient for heat sink surfaces exposed to air: 14 W/(m² C)

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