3D problem of heat transfer.
All length units are in millimeters.
Thermal conductivity of metal λ = 270 W/K·m.
Convection coefficient α = 10 W/(K·m2).
Chip heat flux Q = 10 W.
Calculate radiator thermal resistance.
Thermal resistance is the ratio of Temperature difference to Heat flux. As the heat flux is input parameter, QuickField task is to calculate the temperature distribution.
QuickField takes an input heat flux as watts per meter square [W/m2]. So we should divide Q [W] by the chip surface area (which is 20mm x 20mm = 0.004 m2).
Temperature distribution in the heat sink:
See the chip_radiator_heat_sink.pbm problem in the Examples folder.