In this paper, fluctuating pressure fields around cubes are examined using both numerical, simulations and wind tunnel tests, 3D, time-dependent numerical simulations based on Large Eddy Simulation were carried out in order to clarify the relation between the structures of unsteady flowfields around cubes and the fluctuating surface pressure fields. Accuracy of the numerical simulation was assessed by comparing the numerical results with the results of wind tunnel tests using the Multi-Channel Simultaneous Pressure Measuring System .
It was confirmed that the shapes of the numerically predicted spectra of fluctuating drag and side forces correspond very well to those of experimental data Furthermore the numerical simulation can reproduce the characteristic pattern of the surface pressure fluctuations rather well It was observed from the numerical results that the sharp peak appears in the wave pattern of the side force fluctuation when a large scale vortex occurs in the separated flow region near the side wall .

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