TY - JOUR
T1 - Bubbly Turbulent Drag Reduction is a Boundary Layer Effect
AU - van den Berg, Thomas H.
AU - van Gils, Dennis P.M.
AU - Lathrop, Daniel P.
AU - Lohse, Detlef
PY - 2007
Y1 - 2007
N2 - In turbulent Taylor-Couette flow, the injection of bubbles reduces the overall drag. On the other hand, rough walls enhance the overall drag. In this work, we inject bubbles into turbulent Taylor-Couette flow with rough walls (with a Reynolds number up to 4×105), finding an enhancement of the dimensionless drag as compared to the case without bubbles. The dimensional drag is unchanged. As in the rough-wall case no smooth boundary layers can develop, the results demonstrate that bubbly drag reduction is a pure boundary layer effect
AB - In turbulent Taylor-Couette flow, the injection of bubbles reduces the overall drag. On the other hand, rough walls enhance the overall drag. In this work, we inject bubbles into turbulent Taylor-Couette flow with rough walls (with a Reynolds number up to 4×105), finding an enhancement of the dimensionless drag as compared to the case without bubbles. The dimensional drag is unchanged. As in the rough-wall case no smooth boundary layers can develop, the results demonstrate that bubbly drag reduction is a pure boundary layer effect
U2 - 10.1103/PhysRevLett.98.084501
DO - 10.1103/PhysRevLett.98.084501
M3 - Article
SN - 0031-9007
VL - 98
JO - Physical review letters
JF - Physical review letters
IS - 8
M1 - 084501
ER -