한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제20권1호
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  • Pages.38-44
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  • 2022
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  • 1598-8430(pISSN)
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  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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역압력 구배 난류 경계층에서 레이놀즈 응력의 스케일 간 수송

Interscale transport of the Reynolds stress in a turbulent boundary layer subjected to adverse pressure gradient

  • Yoon, Min (Division of Mechanical Engineering, Korea Maritime and Ocean University)
  • 투고 : 2022.02.09
  • 심사 : 2022.02.28
  • 발행 : 2022.03.31
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초록

An interscale transport of the turbulent kinetic energy (TKE) and Reynolds shear stress (RSS) is examined in an adverse pressure gradient (APG) turbulent boundary layer (TBL). The direct numerical simulation data of an APG TBL at Reτ = 834 and β = 1.45 is employed. The TKE and RSS transport equations are divided into large and small scales, leading to the introduction of interscale transport. The TKE mainly transfers from large scales to small ones in the outer region, and vice versa for the RSS. An interscale transport of TKE and inverse interscale transport of RSS are amplified by APG, and the latter results in the increase in large scales of TKE production. Some of outer large scales of enhanced TKE transfer to small scales and then dissipate by viscosity, and the remains dissipate turbulent-non-turbulent interfaces by turbulent transport.

키워드

과제정보

이 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 무인이동체 원천기술개발사업(2020M3C1C1A0208632612)과 한국연구재단의 지원을 받아 수행된 연구임(2021R1F1A1053438).

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