STUDY ON MESH REFINEMENT INDEXES FOR TIDE-INDUCED RESIDUAL CURRENTS IN AN ENCLOSED BAY
- Other Title
It is of great significance to consider local mesh refinement for enhancing the efficiency in numerical computation of tide-induced residual currents in an enclosed bay. The objectives of the present study are thus to propose a mesh refinement index that is useful for determining local areas where finer mesh should be adopted. We performed a series of numerical simulation using several types of mesh with different horizontal resolution of 400m, 800m and 1600m, respectively, in Ise Bay. Computational results of all the adopted mesh systems are basically consistent with field measurements. However, computational results of local residual currents around straits were rather sensitive to the adopted horizontal mesh size, which indicated the importance of adopting local mesh refinement. Thus we proposed mesh refinement indexes in terms of the horizontal gradient of depths and residual currents. Through the comparison of estimated errors of residual currents, we concluded that the mesh refinemnt index using the horizontal gradient of residual currents is more appropriate on the basis of statistical analysis with the value of the coefficient of determination being 0.48.
- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 69 (2), I_1246-I_1251, 2013
Japan Society of Civil Engineers