角柱周辺の気流および風圧力に関する数値解析的研究

抄録

A method is investigated for the solution of time-dependent problems concerning wind flow and wind pressure arounda body in two-dimensional. turbulent, airflow. The method is numerical, using a computer, for the solution of a finite-difference approximation to the primitive equations of motion, with subgrid scale effects and the Reynolds stresses, which are simulated by uniform eddy viscousity coefficient, consequently being coincident with the problem as the one concerning the flow of viscous fluids at the Reynolds number as high as 200 or so. The computational examples were given about a long cylinder of square cross-section with several angles of attack. The results seem to be in good agreement with the experimental data at small Reynolds numbers, and yet to be unsatisfactory from the standpoint of such as a Building scale phenomenon.