Formula Sheet

1st law of thermodynamics:

semi-infinite solids, surface temp at Ts

Conduction: Convection: Radiation:

Control Volume:

Surface volume: Solids: Free electrons: Gases: Joule heating: Interfaces: Cartesian:

Cylindrical:

Spherical:

Fin Efficiency:

Fin Effectiveness: heat wave speed:

Lumped Capacitance Method: ,

error function: Erf(0)=0; Erf()=1; Erf(-)=-1; Erf(0.48)=0.5 , Two semi-infinite solids touch:

,

,