渦法における工学的適用性の向上に関する研究(流体工学,流体機械)

概要

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In this study, a scheme for introduction of vortex elements over a solid surface was proposed for a vortex method. Vortex elements were introduced and vorticity redistributions were made over the solid surface in this scheme. Thickness of vorticity layer and panel size were figured out with a non-dimensional thickness of vorticity layer defined by using kinematic viscosity coefficient and friction velocity based on the wall shear stress. To invdstigate effectiveness of this scheme, flows around a two-dimensional circular cylinder in a uniform flow were simulated through changing the non-dimensional thickness of vorticity layer and the initial calculation conditions. The simulations show that this scheme is effective: in spite of the initial conditions the calculation parameters could be automatically determined by using the non-dimensional thickness of vorticity layer, and the calculated results of the flow characteristics had good agreements with the other calculated results.
社団法人日本機械学会の論文
2004-10-25