scholarly journals A Computational Approach to the Prediction of the Floating Condition of ROPAX Vessel after Firewater Accumulation in Firefighting Operation

2020 ◽  
Vol 8 (1) ◽  
pp. 30
Author(s):  
Honggui Wang ◽  
Zhaolin Wu
Keyword(s):  
Good Accuracy ◽  
Computational Approach ◽  
Time Dependent ◽  
Static Theory ◽  
Reliable Estimation

A reliable estimation of the floating condition of a roll on/roll off cargo (ROPAX) vessel after the accumulation of firewater on the vehicle deck is extremely important for making correct decisions on evacuation and abandonment. Thus, for the seafarer working on a ROPAX vessel, there is a demand for a time-dependent prediction of the floating condition of the vessel after the firewater accumulation. For this purpose, a new iterative computational approach, based on quasi-static theory, is presented. The approach is examined through the records observed in an accident of the M/V Dashun. The results show that the approach has good accuracy and feasibility provided that the actual heeling angle and cargo shift during the accident are carefully monitored.

A NUMERICAL METHOD FOR 1D TIME-DEPENDENT SCHRÖDINGER EQUATION USING RADIAL BASIS FUNCTIONS

2013 ◽  
Vol 10 (02) ◽  
pp. 1341010 ◽  
Author(s):  
TONGSONG JIANG ◽  
ZHAOLIN JIANG ◽  
JOSEPH KOLIBAL
Keyword(s):  
Finite Difference ◽  
Difference Scheme ◽  
Numerical Method ◽  
Radial Basis Functions ◽  
Finite Difference Scheme ◽  
Good Accuracy ◽  
Basis Functions ◽  
Time Dependent ◽  
Numerical Examples ◽  
Radial Basis

This paper proposes a new numerical method to solve the 1D time-dependent Schrödinger equations based on the finite difference scheme by means of multiquadrics (MQ) and inverse multiquadrics (IMQ) radial basis functions. The numerical examples are given to confirm the good accuracy of the proposed methods.

scholarly journals Asymmetrical Vortex over Slender Body A Computational Approach

2021 ◽  
Vol 71 (2) ◽  
pp. 282-288
Author(s):  
P. K. Karn ◽  
P. Kumar ◽  
Sudip Das
Keyword(s):  
Experimental Data ◽  
Reynolds Number ◽  
Electron Microscope ◽  
Slenderness Ratio ◽  
Computational Approach ◽  
Slender Body ◽  
Time Dependent ◽  
The Past ◽  
Physical Geometry ◽  
Scanning Electron

Computational investigations were carried out on an ogive-cylinder configuration having a slenderness ratio of 7.5. The geometry of the nose tip was generated based on the physical geometry of the nose tip observed under a scanning electron microscope. Time-dependent simulations were performed on the slender body at a diameter Reynolds number of 3.0×104. Results indicated that the onset of vortex asymmetry was mainly due to the micro-tip imperfection existing at the tip. It was also observed that the variation in the roll angle of the model affected the flow physics largely which has been experimentally observed by several researchers in the past. The computed results were in better agreement with the referenced experimental data.

Boundary Conditions and Initial Value Lines for Unsteady Homentropic Flow Calculations

1970 ◽  
Vol 21 (2) ◽  
pp. 145-162 ◽  
Author(s):  
W. A. Woods ◽  
H. Daneshyar
Keyword(s):  
Boundary Condition ◽  
Analytical Solution ◽  
Boundary Conditions ◽  
Good Accuracy ◽  
Numerical Calculations ◽  
Time Dependent ◽  
Straight Pipe ◽  
Initial Value ◽  
Use Of Time ◽  
The Difference

SummaryA detailed discussion on the difference between an initial value line and a line characterised by a boundary condition has been presented. Two types of boundaries are described and illustrated. To examine each boundary, several different calculations have been performed for a straight pipe. The results of the numerical calculations are compared with an analytical solution. It is shown that known pressure and velocity at the pipe ends give the most accurate results. Comparisons are also made between several practical types of calculations which give similar findings. The use of time-dependent boundaries can lead to errors as large as 40 per cent in derived results. It is shown that good accuracy can be restored by converting the boundaries into initial value lines. It is concluded that in general no more than one time-dependent boundary should be used in any calculation. Finally it is demonstrated that errors are not revealed by means of pressure diagrams alone.

Ab Initio Computational Approach for Nanophotonics Based on Time-Dependent Density Functional Theory

2021 ◽  
pp. 103-133
Author(s):  
Kazuhiro Yabana ◽  
Takashi Takeuchi ◽  
Mitsuharu Uemoto ◽  
Atsushi Yamada ◽  
Shunsuke Yamada
Keyword(s):  
Density Functional Theory ◽  
Ab Initio ◽  
Density Functional ◽  
Computational Approach ◽  
Time Dependent ◽  
Functional Theory ◽  
Dependent Density

Investigating the optical properties of BOIMPY dyes using ab initio tools

2017 ◽  
Vol 19 (16) ◽  
pp. 10554-10561 ◽  
Author(s):  
Boris Le Guennic ◽  
Giovanni Scalmani ◽  
Michael J. Frisch ◽  
Adèle D. Laurent ◽  
Denis Jacquemin
Keyword(s):  
Density Functional Theory ◽  
Spectral Properties ◽  
Density Functional ◽  
Computational Approach ◽  
Time Dependent ◽  
Coupled Cluster ◽  
Functional Theory ◽  
Td Dft ◽  
Large Panel ◽  
Dependent Density

Using a computational approach combining Time-Dependent Density Functional Theory (TD-DFT) and second-order Coupled Cluster (CC2) approaches, we investigate the spectral properties of a large panel of BOIMPY dyes.

Nano-Creep Test for Anatase Polycrystalline Films

2001 ◽  
Vol 695 ◽  
Author(s):  
Hironori Sugata ◽  
Shigeo Ohshio ◽  
Hidetoshi Saitoh
Keyword(s):  
Thin Films ◽  
Deformation Behavior ◽  
Good Accuracy ◽  
Time Dependent ◽  
Structural Deformation ◽  
Boundary Structure ◽  
Nanometer Scale ◽  
Polycrystalline Films ◽  
Analytical Technique ◽  
Grain Boundary Structure

ABSTRACTWe introduce an analytical technique for time-dependent deformation behavior of the polycrystalline films using a nano-indenter. This technique permits evaluation of structural deformation of the nanometer scale of the thin films. In this paper, good accuracy conditions were determined to measure deformation behavior of the polycrystalline films. The polycrystalline films of anatase were used to investigate the grain boundary structure. We prove that the analysis of time-dependent deformation behavior is effective to investigate the structure of the polycrystalline films.

scholarly journals A New Numerical Method of Particular Solutions for Inhomogeneous Burgers’ Equation

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Huantian Xie ◽  
Dingfang Li ◽  
Feng Li
Keyword(s):  
Finite Difference ◽  
Difference Scheme ◽  
Good Accuracy ◽  
Burgers Equation ◽  
Basis Functions ◽  
Time Dependent ◽  
Numerical Examples ◽  
One Dimensional ◽  
Particular Solutions ◽  
Method Of Particular Solutions

Based on the finite difference scheme in time, the method of particular solutions using radial basis functions is proposed to solve one-dimensional time-dependent inhomogeneous Burgers’ equations. Two numerical examples with good accuracy are given to validate the proposed method.

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