Numerical investigation of the flow around a rotating cylinder with a plate under the subcritical regime of the Reynolds number

ABSTRACT

The results of a numerical study of the flow around a circular rotating cylinder under the subcritical regime of the Reynolds number are presented. A numerical flow simulation was carried out using the Realisable k-ε turbulence model, which effectively visualizes the fallout of vortices. At Reynolds numbers 16,000, 30000, and 50,000 and revolutions 300,500 and 700, the velocity field around the cylinder with the plate and the static pressure distribution field around the cylinder with the plate are obtained. It is determined that with an increase in the rotation frequency of the cylinder with the plate, the vortex formation increases. In the future, there will be an increase in lifting force and drag force due to an increase in flow velocity and, consequently, a decrease in pressure. Due to the rotational motion, there is a change in the pressure field at the ends of the cylinder with the plate.

KEYWORDS:

• cylinder with plate
• Reynolds number
• numerical study
• drag coefficient
• lift coefficient

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was carried out with the financial support of the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (IRN AP14972704 “Numerical study of a new design of wind turbine blades with a horizontal axis of rotation”)