Abstract
Due to very strong compressibility, a fluid near critical point is compressed by its own weight under Ig. Being free from the gravity effect, microgravity conditions are necessary for conducting an experiment on near critical fluid behavior. We study heat transfer experimentally and numerically in a supercritical CO_2 under microgravity. We succeed that numerical analysis has capture the thermal diffusion layer by experiment according to take the peculiarity of the thermal properties in near critical point into consideration.
