scholarly journals FIELD OBSERVATION ON LONG-PERIOD MOTIONS OF MOORED VESSEL AND ITS NUMERICAL SIMULATION

1999 ◽  
Vol 15 ◽  
pp. 77-82
Author(s):  
Katsuyuki ASAZAKI ◽  
Norichika MATSUO ◽  
Akiyuki UKAI ◽  
Yoichi MORIYA ◽  
Masanori TSUGANE
Keyword(s):  
Numerical Simulation ◽  
Field Observation ◽  
Long Period

scholarly journals Development of Depth-Limited Wave Boundary Layers over a Smooth Bottom

2020 ◽  
Vol 9 (1) ◽  
pp. 27
Author(s):  
Hitoshi Tanaka ◽  
Nguyen Xuan Tinh ◽  
Xiping Yu ◽  
Guangwei Liu
Keyword(s):  
Numerical Simulation ◽  
Boundary Layer ◽  
Boundary Layers ◽  
Wave Motion ◽  
Numerical Study ◽  
Experiment Data ◽  
Tidal Motion ◽  
Long Period ◽  
Simulation Results ◽  
Wave Boundary

A theoretical and numerical study is carried out to investigate the transformation of the wave boundary layer from non-depth-limited (wave-like boundary layer) to depth-limited one (current-like boundary layer) over a smooth bottom. A long period of wave motion is not sufficient to induce depth-limited properties, although it has simply been assumed in various situations under long waves, such as tsunami and tidal currents. Four criteria are obtained theoretically for recognizing the inception of the depth-limited condition under waves. To validate the theoretical criteria, numerical simulation results using a turbulence model as well as laboratory experiment data are employed. In addition, typical field situations induced by tidal motion and tsunami are discussed to show the usefulness of the proposed criteria.

scholarly journals AN ESTIMATION OF LONG-PERIOD OSCILATIONS OF MOORED SHIP BY NUMERICAL SIMULATION

2002 ◽  
Vol 18 ◽  
pp. 137-142 ◽  
Author(s):  
Satoru SHIRAISHI ◽  
Haruo YONEYAMA ◽  
Hirakazu SATO ◽  
Kenji SASA
Keyword(s):  
Numerical Simulation ◽  
Long Period

Analytical and Calibration Models for Slot Antennas

2019 ◽  
pp. 57-100
Author(s):  
Kok Yeow You
Keyword(s):  
Numerical Simulation ◽  
Analytical Calculation ◽  
Computation Time ◽  
Systematic Errors ◽  
Simulation Software ◽  
Slot Antenna ◽  
Slot Antennas ◽  
Long Period ◽  
Calibration Models ◽  
Calibration Methods

In this chapter, the background, analytical formulations, and calibration routines for slot antennas are briefly reviewed. Performance and operating frequency of the slot antenna are strongly dependent on the dimension and shape of the slot or slotted array on the antenna. Nowadays, most antennas are designed using numerical simulation software for accuracy in analysis. However, analytical formulations still play an important role in the pre-design of the antenna due to the numerical simulation which still requires relatively long period of computation time compared to the analytical calculation. The predicted dimension of the antenna from analytical calculations will only require minor adjustment to optimize its performance in numerical simulation. Hence, the time spent for the antenna design can be shortened. Besides the performance of antenna, the antenna calibration process is crucial as well for releasing systematic errors in the antenna measurements. Some one-port calibration methods are described in detail.

Field observation and numerical simulation of past and future storm surges in the Bay of Bengal: case study of cyclone Nargis

2014 ◽  
Vol 75 (2) ◽  
pp. 1619-1647 ◽  
Author(s):  
Khandker Masuma Tasnim ◽  
Tomoya Shibayama ◽  
Miguel Esteban ◽  
Hiroshi Takagi ◽  
Koichiro Ohira ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Bay Of Bengal ◽  
Field Observation ◽  
Storm Surges ◽  
Cyclone Nargis
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