THERMAL CALCULATORS The following thermal calculators are provided to assist you with your thermal management problems. Slab Thermal Resistance This one-dimensional steady-state heat conduction calculator provides the thermal resistance through the height axis of a solid slab, given uniform heat input and output, and having insulated sidewalls. Cylinder Thermal Resistance This one-dimensional steady-state heat conduction calculator provides the thermal resistance through the height axis of a solid cylinder, given uniform heat input and output, and having insulated sidewalls. Hollow Cylinder Thermal Resistance This one-dimensional steady-state heat conduction calculator provides the thermal resistance through the sidewall of a hollow cylinder, given uniform heat input and output, and having insulated ends. Slab Thermal Resistance With Constriction This two-dimensional steady-state heat conduction calculator provides the thermal resistance through the height axis of a solid slab, flat heat pipe, or heat spreader, including the thermal constriction resistance resulting from a heat source that is smaller than the slab, given uniform heat input and output, and having all other surfaces insulated. Slab Mass Thermal Resistance This one-dimensional transient heat capacitance calculator provides the thermal resistance of a solid slab, given the mass thermal properties, finite heat input, and being fully insulated. Mass Flow Thermal Resistance This one-dimensional steady heat capacitance calculator provides the thermal resistance of a mass flow system, given the mass thermal properties and flow rate. Slab Fin Efficiency This one-dimensional steady-state heat conduction calculator provides the fin efficiency or effectiveness of a slab or cuboid shaped fin, given uniform cross-sectional area, uniform heat input, and insulated ends. Pin Fin Efficiency This one-dimensional steady-state heat conduction calculator provides the fin efficiency or effectiveness of a pin or cylindrical shaped fin, given uniform cross-sectional area, uniform heat input, and insulated ends. 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. Peltier (thermoelectric) Cooler Thermal and Electrical Performance This steady-state calculator provides the thermal and electrical performance of a Bismuth Teluride based Peltier (thermoelectric) cooling system, as a function of ambient temperature, hot and cold side heat exchanger performance, thermal load, Peltier module (thermopile) geometry, and Peltier electrical parameters.