Turbulence Modeling of Torsional Couette Flows

Figure 12

Influence of the aspect ratio on the isovalues of the turbulence Reynolds number Re_𝑡=𝑘²/(𝜈𝜀) (normalized by its maximum value Re_𝑡max) for various sets of flow parameters (Re,𝐺): (a) (1.8×10⁵, 0.05), Re_𝑡max=84.74; (b) (1.8×10⁵, 0.04), Re_𝑡max=78.58; (c) (1.8×10⁵, 0.02), Re_𝑡max=57.61; (d) (5×10⁶, 0.04), Re_𝑡max=2141.7; (e) (5×10⁶, 0.02), Re_𝑡max=2233.

(a)

(b)

(c)

(d)

(e)