 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Autocorrelation, Power Spectrum Analysis and Eddy Viscosity Coefficient of Tidal Current) ผู้เขียน: ดร.มณฑล อนงค์พรยศกุล, ผู้ช่วยศาสตราจารย์ ,  Takashi Sasaki สื่อสิ่งพิมพ์:pdf AbstractTwenty-records of current velocity were obtained at two coastal stations in the Seto Inland sea. It was observed that water movement was characterized by east-west flow and north-south flow. Autocorrelation analysis showed that the characteristics of water motion were periodic in semidiurnal period. At frequencies about 2 cycles per day where power spectrum of current velocity had slopes of -5/3, the horizontal eddy viscosity coefficient were about 1.8x104 cm2/sec in east-west component and about 1.2x104 cm2/sec in north component. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Numerical Calculation of the Tidal Currents in Yashima Bay) ผู้เขียน:ดร.มณฑล อนงค์พรยศกุล, ผู้ช่วยศาสตราจารย์, Takashi Sasaki สื่อสิ่งพิมพ์:pdf AbstractA mathematical method was developed to predict the tidal motion in all study site. The basis of computation were the vertically integrated Navier-Stokes equations and continuity equation in and Eulerian system. The considered forces were inertia, coriolis, pressure gradient and friction. The effect of viscosity of sea water was introduced. The wind stress would be neglected. The solutions of tidal current computation were obtained on the basis of the scheme of explicit method by Ueno (1967). Since the solution of this model was solved by numerical method, so the effects of stability and convergence had to be considered. The use of the computational procedure was illustrated with results of tidal computations of the Yashima Bay, Japan |