学術雑誌論文

学術雑誌論文

text

International Journal of Heat and Fluid Flow. 2025, 116, p. 109933

Enhancement of wall-bounded turbulence by solid particles under gravity

Elsevier B.V.

英語

text

2025-06-27

https://doi.org/10.1016/j.ijheatfluidflow.2025.109933

Motoori Y., Goto S.. Enhancement of wall-bounded turbulence by solid particles under gravity. International Journal of Heat and Fluid Flow 116, 109933 (2025); https://doi.org/10.1016/j.ijheatfluidflow.2025.109933.

When we add solid particles to turbulent flow, the turbulence can be either attenuated or enhanced. Both phenomena are caused by the wakes of particles. More specifically, turbulence attenuation is due to the additional energy dissipation in the wakes, while turbulence enhancement is due to the additional turbulent energy by the wakes. In the present study, we propose a scenario for turbulence modulation in terms of particle wakes and verify it using direct numerical simulation data of turbulent channel flow in the presence of gravity. We show that the total turbulent kinetic energy is enhanced when the relative velocity becomes larger so that a significant turbulent energy is introduced locally by particle wakes. This does not happen in the absence of gravity.

This article is licensed under a Creative Commons Attribution 4.0 International License.

102629

Enhancement of wall-bounded turbulence by solid particles under gravity

Elsevier B.V.

英語

2025-06-27

International Journal of Heat and Fluid Flow

116

109933

https://doi.org/10.1016/j.ijheatfluidflow.2025.109933

https://hdl.handle.net/11094/102629