Multizone decomposition for simulation of time-dependent problems using the multiquadric scheme

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Abstract

This paper discusses the application of the multizone decomposition technique with multiquadric scheme for the numerical solutions of a time-dependent problem. The construction of the multizone algorithm is based on a domain decomposition technique to subdivide the global region into a number of finite subdomains. The reduction of ill-conditioning and the improvement of the computational efficiency can be achieved with a smaller resulting matrix on each subdomain. The proposed scheme is applied to a hypothetical linear two-dimensional hydrodynamic model as well as a real-life nonlinear two-dimensional hydrodynamic model in the Tolo Harbour of Hong Kong to simulate the water flow circulation patterns. To illustrate the computational efficiency and accuracy of the technique, the numerical results are compared with those solutions obtained from the same problem using a single domain multiquadric scheme. The computational efficiency of the multizone technique is improved substantially with faster convergence without significant degradation in accuracy.

Keywords

Multizone
Decomposition
Hydrodynamics equation
Multiquadric

Cited by (0)

This research is supported by the Research and Development Fund of the Open University of Hong Kong, # 1.7/96 and the Research Grant Committee of City University of HK, #9040286.

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The authors wish to thank the Royal Observatory of Hong Kong for providing meteorological data for numerical computation.