Investigation of Bubbly Flows Around Rotating Bodies

There are different approaches for simulating two-phase flows. In this Paper a Non Conservative force field is used to model bubble’s effect on the fluid flow. To reach this goal، firstly bubble-fluid interaction model for simulating bubble effect on fluid flow is presented in addition to bubble dynamic analysis in the fluid flow. According to the main idea in this research، two phase flow analysis is reduced to single phase flow. This model makes it possible to use the powerful LES method for simulating this phenomenon. In this present work، two concentric cylinders which inner one rotating with constant velocity (Taylor-Couette flow) is solved by LES method which is the best method in turbulence modeling. Thus، this problem is simulated for different Reynolds numbers. Moreover، the results are compared with DNS method. Furthermore، the effects of micro bubble injection on the velocity profile and turbulence intensity are discussed. On the other hand، the effects of micro bubble number on drag reduction are investigated.