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SLOSHING IN A T-BAFFLED RECTANGULAR STORAGE TANK 27
NUMERICAL STUDY FOR 2–D PROBLEMS

It is of great importance to know the maximum pressure exerting on the tank wall in the design

of the liquid tanks. Thus, the instantaneous peak values in the time histories of the pressure at
each transducer have been averaged to obtain the mean maximum pressure according to the

baffle height. Fig. 16 and Fig. 17 show the dependence of the mean maximum pressure on the
baffle height. Since the transducers of T3 and T4 locate above the initial free surface height, the
values of pressure at these transducers are obtained by net liquid impact, resulting in the

dynamic pressures. As hB / h and the rolling amplitude increase continuously, Pmax diminishes
rapidly. For smaller rolling amplitude (40), the maximum pressures decrease slowly as shown in

Fig. 16 and Fig. 17. The values of Pmax for hB / h = 0.4 and 0.8 are about 10% and 15 % less
than that of hB / h = 0.0 at T1 for the rolling amplitude 80. On the other hand, the values of Pmax
for hB / h = 0.4 and 0.8 are about 0.25% and 1% less than that of hB / h = 0.0 at T1 for the rolling
amplitude 40. In the case of the vertical and horizontal baffles, the maximum pressures decrease
approximately 6% more than that of the vertical baffle case and remain almost unchanged for all

hB / h (Fig. 17). Pmax at T4 does not also reach the top wall due to the suppression of the liquid
sloshing by the hydrodynamic damping and the shallow water effect of the T-shape baffle. In

general, at T1, the static pressure is mainly predominant over the dynamic pressure. As hB / h
and the rolling amplitude increase continuously, Pmax diminishes slowly for hB / h < 0.8 and
rapidly for hB / h ≥ 0.8. Then, It can be concluded that a vertical baffle for hB / h < 0.8 would be

more effective except the maximum dynamic pressure at T2 and T-shape baffle having a height
hB / h ≥ 0.8 would be very effective in reducing the dynamic pressure.

0.008 T1
0.006 T2
T3
T4

P/ gL0.004

0.002

0
3 6 9 12 15 18 21 24

t

Figure 10. Pressure distributions at the transducers in T-baffled tank under the rolling motion. hB /
h = 0.0; h = 0.465 m; ωR = 5.0 r/s; θ0 = 40.

Sayı 1, 2014 GiDB|DERGi