19. Large Plane Concrete Wall Subjected Suddenly to Convection Heat Transfer

In this chapter, we will investigate transient temperature distribution in a large plane concrete wall which is subjected suddenly to convection heat transfer on both surfaces and the initial plane wall temperature, T_{w − ini}, does not equal to environment’s temperature, T_env, or T_{w − ini} ≠ T_env, as shown in Figure 19-1. There are several ways we can approach to solve transient temperature distributions in a large plane wall depending upon values of two important non-dimensional numbers. First non-dimensional number is the Biot number given in Equation 19-1 which is the ratio of the conduction heat transfer resistance within the plane wall to convection heat transfer resistance at two surfaces of the plane wall.