Preliminary Analysis of Back tracking Interpolation in ELCIRC Model

doi:10.3969/j.issn.1001-5485.2013.06.022

JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2013, Vol. 30 ›› Issue (6): 99-102.DOI: 10.3969/j.issn.1001-5485.2013.06.022

• TECHNICAL NOTES • Previous Articles

Preliminary Analysis of Back tracking Interpolation in ELCIRC Model

YANG Fei¹, YANG Wen jun¹, WANG Li hua²

1.Key Laboratory of Flood Control and River & Lake Regulation, Yangtze River Scientific Research Institute, Wuhan 430010, China;
2.Water Affairs Bureau of Wulong County Chongqing City, Chongqing 408500,China

Received:2012-05-17 Revised:2013-06-04 Online:2013-06-04 Published:2013-06-04

Abstract

Abstract: The numerical algorithm of ELCIRC (Eulerian Lagrangian CIRCulation) has an important advantage: the total derivatives of the horizontal normal velocity are discretized using Lagrangian back tracking. The use of accurate tracking algorithms is strongly recommended for this Eulerian Lagrangian simulation. Tracking errors in inverse bilinear mapping for quadrangles is discussed and a more simple iterative method is recommended. A calculation example of bend flume shows that this iterative method has the same accuracy and computational efficiency with the original method.

Key words: ELCIRC, bilinear mapping, error, Eulerian Lagrangian simulation, back tracking

CLC Number:

TV131.4

YANG Fei, YANG Wen jun, WANG Li hua. Preliminary Analysis of Back tracking Interpolation in ELCIRC Model[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2013, 30(6): 99-102.

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Preliminary Analysis of Back tracking Interpolation in ELCIRC Model

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