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NUMERICAL AND EXPERIMENTAL INVESTIGATION ON TURBULENCE STRUCTURES IN A DRAG-REDUCING FLOW WITH SURFACTANT ADDITIVES

Bo Yu
Turbomachinery Research Group, Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology, 1-2 Namiki, Tsukuba, Ibaraki 305-8564, Japan; Center for Smart Control of Turbulence

Fengchen Li
Turbomachinery Research Group, Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology, 1-2 Namiki, Tsukuba, Ibaraki 305-8564, Japan; Center for Smart Control of Turbulence

Yasuo Kawaguchi
Turbomachinery Research Group, Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology, 1-2 Namiki, Tsukuba, Ibaraki 305-8564, Japan

Resumo

DNSs and experiments were carried out for a turbulent channel flow of a 75 ppm CTAC (Cetyltrimethyl ammonium chloride) surfactant solution. The numerical and experimental results such as velocity profiles, root-mean-square velocity fluctuations, Reynolds shear stress, and production of turbulent kinetic energy were compared. The results were also compared with those of Newtonian fluid flow at similar Reynolds numbers.