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Submitted on: 17 June 2000.
Revised on: 17 September 2000.
Accepted on: 11 November 2000.
___________________INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
Submitted on: 17 June 2007.
Revised on: 11 July 2007.
Accepted on: 08 August 2007.
___________________INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
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