FORCED CONVECTION HEAT SINK THERMAL RESISTANCE This steady-state forced convection heat sink calculator provides thermal resistance and pressure drop, given uniform heat input and uniform air flow. This model is based on the fluid properties of air at 50°C, and includes entrance and exit pressure loss effects, and excludes any base conduction resistance. Adding this resistance with the " Slab Thermal Resistance with Constriction Calculator ", provides very accurate results. Variable Unit Value Volumetric Flow Rate m^3/s Number of Fins   Fin Width m Fin Length m Fin Height m Sink Width m Fin Thermal Conductivity W/m·°K       Thermal Resistance °C/W Pressure Drop Pa