円管内におけるビンガム塑性流体の乱流遷移に関する理論的研究

抄録

Turbulence transition of Bingham plastic fluid is studied theoretically by evaluating the stability of small disturbances. As the object of this study, fully developed Flow in a pipe is chosen. Then basic equation is derived from the Hencky equation and for the numerical calculation. Runge-Kutta-Gill method is adopted. In case of Bingham plastic fluid, it is found that the calculated Critical Reynolds Number does not become infinity. The calculated Critical Reynolds Number is compared with the experimental results and it is found that the calculated results agree well with the experimental results if relative plug radius is greater than 0.6.