Microgravity Environment and Thermal Conductivity Measurement of Fluid Samples

The literatures about thermal conductivity measurement of fluid samples without thermal convection using a microgravity environment were researched. The measurement methods that have been carried out in microgravity were classified into three types: (1) hot wire method, (2) hot disk method, and (3) levitation method. One of the problem is limited measurement opportunities, and there are not enough measurement data. To overcome the problem of the measuremaents in microgravity, the ground- based measurement techniques reducing thermal convection are being developed and summarized.