Direct numerical simulation of the stability of zero-pressure-gradient boundary layer over corrugated wall using the immersed interface method

UNNO, Ryohei; Inasawa, Ayumu

doi:10.1299/jfst.2023jfst0024

JFST

2023

DOI: 10.1299/jfst.2023jfst0024

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Direct numerical simulation of the stability of zero-pressure-gradient boundary layer over corrugated wall using the immersed interface method

Ryohei UNNO

Ayumu Inasawa

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2024

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三次元波状壁上に発達するゼロ圧力勾配境界層の不安定性に関する直接数値シミュレーション

UNNO,

INASAWA

2024

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The influences of surface corrugation with small amplitude on zero-pressure-gradient boundary layer instability were examined numerically by solving the three-dimensional compressible Navier-Stokes equations. Three-dimensional sinusoidal corrugations, with amplitude less than 10% of the boundary layer thickness and wavelengths nearly the same as that of Tollmien-Schlichting (T-S) wavelength, were considered. The results showed that the basic flow near the surface followed the corrugated surface without any separation and low-and high-speed streaks were formed in the middle of the boundary layer. The three-dimensional surface corrugation had little influence on the growth of T-S waves compared to two-dimensional surface corrugation, that is, the growth rate of T-S wave was almost the same as that of smooth wall case. Amplitude of energy production in the three-dimensional corrugation case was found to be about half of that in the two-dimensional case while energy diffusion remained nearly the same in both cases. It was also found that the transient distance of change in surface geometry from smooth wall to three-dimensional corrugation wall was only about one corrugation wavelength.

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三次元波状壁上に発達するゼロ圧力勾配境界層の不安定性に関する直接数値シミュレーション

UNNO,

INASAWA

2024

Transactions of the JSME (In Japanese)

Self Cite

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show abstract

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Direct numerical simulation of the stability of zero-pressure-gradient boundary layer over corrugated wall using the immersed interface method

Cited by 1 publication

References 24 publications

三次元波状壁上に発達するゼロ圧力勾配境界層の不安定性に関する直接数値シミュレーション

三次元波状壁上に発達するゼロ圧力勾配境界層の不安定性に関する直接数値シミュレーション

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