Fig.8 Comparison of calculated and measured waves along center line
Fig.9 Comparison of calculated and measured waves along lines of x-constant at Fn=1.29
Fig.8 shows the comparison of calculated and measured free surface on the x-z plane. The calculated wave height of crest and trough of waves are reduced less than the measured ones. This may be caused by the effects of the viscous forces by a low.
Reynolds number of calculation.
Fig.9 shows the comparison of calculated and measured free surface on the several y-z planes. The both near the plate are in good agreement with each other, but the difference of both can be observed in the area near the top of triangle waves because of the computation at a low Reynolds number.
Fig. 10 shows the calculated velocity (v,w) on the several y-z planes at Fn=1.29 and T=4.5. The x=0.0 indicates the leading edge (a), x=1.0 is the trailing edge (c) and x=2.50 is about the top of the triangle wave (e). The remarkable facts are, at the leading edge the large vertical velocities w can be observed, at the midships outerward velocities v induces the sharp free surface elevation, and in the rear of trailing edge larger vertical velocities near the free surface are found and they produce the triangle waves.
Fig. 10 Computational velocity vector in the waves along lines of x=constant at Fn= 1.29
The calculated pressure (Φ) distribution on the bottom surface of the planing plate is shown in Fig. 11. It is only the left-handed half' plane of the plate. The solid lines show positive values of pressure and dotted lines negative values. A little irregularities of pressure near the side and the leading edge are seemed due to the discontinuity in the grid spacings.
The calculated pressure (Φ) distribution on the center line of the plate is compared with the measured results and is indicated in Fig. 12. These two pressure distributions are almost similar to each other except for the part near the leading edge.
