TY - JOUR

T1 - Mean and fluctuating helicity in swirling jet flows

AU - Stepanov, Rodion

AU - Frick, Peter

AU - Dulin, Vladimir

AU - Markovich, Dmitriy

PY - 2024

Y1 - 2024

N2 - Tomographic particle image velocimetry measurements of turbulent swirling jets open new explorations of mean and pulse components and pattern dynamics. We present direct experimental evidence of turbulent helicity cascade from large scales to small scales. We map the distributions of mean and fluctuating helicity components - the revealing anisotropic structure of helical jet flow. We show that a scenario of helicity generation and decay along the jet depends dramatically on the inflow swirl. The obtained results provide valuable materials to benchmark the modern numerical simulations with a turbulent closure technique.

AB - Tomographic particle image velocimetry measurements of turbulent swirling jets open new explorations of mean and pulse components and pattern dynamics. We present direct experimental evidence of turbulent helicity cascade from large scales to small scales. We map the distributions of mean and fluctuating helicity components - the revealing anisotropic structure of helical jet flow. We show that a scenario of helicity generation and decay along the jet depends dramatically on the inflow swirl. The obtained results provide valuable materials to benchmark the modern numerical simulations with a turbulent closure technique.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85195791130&origin=inward&txGid=4b744df66d9cbf14f79cd0af3b77b4e0

UR - https://www.mendeley.com/catalogue/be9d74f1-fef2-355a-a021-20b34226f9d4/

U2 - 10.1103/PhysRevFluids.9.L062601

DO - 10.1103/PhysRevFluids.9.L062601

M3 - Article

VL - 9

JO - Physical Review Fluids

JF - Physical Review Fluids

SN - 2469-990X

IS - 6

M1 - L062601

ER -