Abstract
In order to acquire the basic data for the thermal conjugation problems between fluid and solid, we are planning to measure spatio-temporal heat transfer from a solid wall to a liquid flow using a high-speed infrared thermograph. The purpose of this work is to verify the feasibility of this measurement to a turbulent water flow in a circular tube. The test surface was fabricated from a 22μm thick titanium foil coated with black paint. As a result, the time-averaged heat transfer coefficient measured here agreed well to the conventional empirical correlation. Also, statistic values of the time-spatial distribution, such as the rms value of the fluctuating heat transfer coefficient and the mean spanwise wavelength of the thermal streaks were reasonably agreed to those reported in previously published literature.
