Spatial Effects
Re-examine the plasma jet example: h=30,000 W/m2.K, k=10.5 W/m.K, and a diameter of 50 mm. Bi=(h/k)(rO/3)=0.0238ɘ.1. Therefore, the use of the LCM is valid in the previous example. However, if the diameter of the particle is increased to 1 mm, then we have to consider the spatial effect since Bi=0.476ɬ.1. The surface temperature can not be considered as the same as the temperature inside the particle. To determine the temperature distribution inside the spherical particle, we need to solve the unsteady heat equation: