View article

In this study, we focus on the Savonius Rotor and try to compute the flow field under its operation and make clear the running performance by means of the numerical simulation. Our final objective is to simulate the flow field around the whole rotor and estimate the effect of the sidewall or the other rotor. Incompressible Navier-Stokes equations are solved in a few regions separately where the fixed coordinate and the rotating coordinate are used respectively. We employ domain decomposition method in order to connect these regions with adequate accuracy. The basic equations in each region are solved by using standard MAC method [HW65]. The physical quantities such as the velocity and the pressure in each region are transferred through the overlapping region, which is common in each domain. Reasonable results are obtained in the present calculations.

Recently, the wind force is widely recognized as the environmentally friendly energy and attracts public attention. The wind power plant using windmills is the typical example. In order to make an effective windmill, it is very important to analyze the flow field around a windmill. In this case, numerical simulation becomes a promising method. The most important part of the investigation is to analyze the flow field near the rotating rotor of the windmill. On the other hand, it is also very important to investigate the interaction among the windmills if they are placed without long distance.