Measurement of Boundary Conditions - Surface Heat Flux and Surface Temperature

In order to understand a heat transfer phenomenon, it is sometimes very important to know the change in heat flux and temperature with time or the distribution of the heat flux and temperature on the surface of a heating block. Furthermore, with the development of computational thermal-fluid dynamics, experimental data that are of the CFD level, both spatially and temporally, are needed to validate the simulation results. However, it is difficult to measure the surface heat flux and surface temperature if no sensors are allowed setting on the surface, which may be a disturbance to the phenomenon itself occurring on the surface. This chapter introduces a technique for the measurement of surface temperature and surface heat flux.