Effect of Rolling Motion on Forces Acting on Bubbles in Sub-Cooled Boiling Flow

Additional accelerations caused by rolling motion impose the forces acting on bubbles in subcooled boiling flow.Comparing with other forces acting on bubbles,the effect of additional accelerations may be neglected.The fluctuations of flow rate caused by additional accelerations have a close relationship with the forces acting on bubbles.The forces acting on bubbles under rolling motion are computed,and compared with that under non-rolling.The results show that rolling motion has great influences on the forces acting on bubbles,which makes obvious changes on the position of vapor bubble departure,hence influences the heat transfer in boiling flow.