TURBULENT FLOW CONTROL AND DRAG REDUCTION
Unconventional surfaces to modify and understand turbulent transport
There are many open questions surrounding the role of the wall boundary conditions in governing transport from the wall to the free stream. Specifically, this research seeks to establish how turbulent scalar and momentum transport are affected when the "no-slip" boundary condition is replaced with more generalized boundary conditions, including a "slip" surface. These results hopefully further our understanding of wall-turbulence interaction to better develop passive flow control surfaces to control drag or mixing. The current work utilizes Liquid-Infused Surface [LIS], Superhydrophobic Surfaces [SHS] and Slippery Liquid-Infused Porous Surfaces [SLIPS], which have been shown to reduce drag through this slip effect, and seeks to model how their surface morphology and lubricant properties affect the magnitude of their effective slip.
I. Marusic, D. Chandran, A. Rouhi, M. K. Fu, D. Wine, B. Holloway, D. Chung, and A. J. Smits, Nat Commun 12, 5805 (2021).
B. J. Rosenberg, T. Van Buren, M. K. Fu, and A. J. Smits, Phys. Fluids, vol. 28, no. 1, p. 015103, 2016.
M. K. Fu, I. Arenas, S. Leonardi, and M. Hultmark, J. Fluid Mech., vol. 824, pp. 688–700, 2017.
EFFECT OF REYNOLDS NUMBER AND SATURATION LEVEL ON GAS DIFFUSION IN AND OUT OF A SUPERHYDROPHOBIC SURFACE,
H. Ling, J. Katz, M. K. Fu, and M. Hultmark, Phys. Rev. Fluids, vol. 2, no. 12, p. 124005, 2017.
M. K. Fu, T.-H. Chen, C. B. Arnold, and M. Hultmark, Exp. Fluids, vol. 60: 100, 2019.
COMPARISON BETWEEN SUPER-HYDROPHOBIC, LIQUID INFUSED AND ROUGH SURFACES: A DIRECT NUMERICAL SIMULATION STUDY
I. Arenas, E. García, M. K. Fu, P. Orlandi, M. Hultmark, and S. Leonardi, J. Fluid Mech., vol. 869, pp. 500–525, 2019.