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Submitted on: 07 July 2013.
Revised on: 11 October 2013.
Accepted on: 30 November 2013.
___________________INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
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Submitted on: 04 June 2011.
Revised on: 23 September 2011.
Accepted on: 14 November 2011.
___________________INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW