TY - JOUR
T1 - Two-Scale Direct-Interaction Approach to the Turbulent Scalar Flux in a Rotating System
AU - Shimomura, Yutaka
PY - 1986/10
Y1 - 1986/10
N2 - Two-scale direct-interaction approximation (TSDIA) is applied to the calculation of the turbulent passive scalar flux, the scalar variance, and the helicity in a rotating system. A skew-diffusion effect is confirmed to appear in a rotating system, which gives rise to the appearance of a component of turbulent scalar flux perpendicular to the local mean scalar gradient and to the axis of rotation. On this basis, the comparison between TSDIA and the smoothing theory is made, and an explicit form for the skew velocity in a rotating system is found.
AB - Two-scale direct-interaction approximation (TSDIA) is applied to the calculation of the turbulent passive scalar flux, the scalar variance, and the helicity in a rotating system. A skew-diffusion effect is confirmed to appear in a rotating system, which gives rise to the appearance of a component of turbulent scalar flux perpendicular to the local mean scalar gradient and to the axis of rotation. On this basis, the comparison between TSDIA and the smoothing theory is made, and an explicit form for the skew velocity in a rotating system is found.
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U2 - 10.1143/JPSJ.55.3388
DO - 10.1143/JPSJ.55.3388
M3 - Article
AN - SCOPUS:0344095249
VL - 55
SP - 3388
EP - 3401
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
ER -