Abstract
Applying the numerical program for the bubble migration in space, we performed a numerical simulation of the bubble behavior with the thermocapillary flow in an open cylindrical container under microgravity conditions. In the present study, 45° sector of the container were modeled. We assumed Marangoni forces on the bubble surfaces were negligible small and calculated a single bubble behavior in 3 dimensional thermocapillary flow in order to make clear the interaction between the thermocapillary flow and the bubble behavior. The following results were obtained by these results; (1) steady state results calculated by the present program agreed well with the results by the previous investigations, (2) the single bubble flowed largely along the streamline of the thermocapillary flow and the moving bubble did not largely change the temperature field, and (3) the repulsive forces were produced by the bubble motion and the magnitudes became larger as the bubble approached to the hot region.
