Improvements to the RELAP5-3D Nearly-Implicit Numerical Scheme

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The RELAP5-3D computer program has been improved with regard to its nearly-implicit numerical scheme for twophase flow and single-phase flow. Changes were made to the nearly-implicit numerical scheme finite difference momentum equations as follows: (1) added the velocity flip-flop mass/energy error mitigation logic, (2) added the modified Henry-Fauske choking model, (3) used the new time void fraction in the horizontal stratification force terms and gravity head, and (4) used an implicit form of the artificial viscosity. The code modifications allow the nearly-implicit numerical scheme to be more implicit and lead to enhanced numerical stability.

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Riemke, Richard A.; Weaver, Walter L. & Schultz, RIchard R. May 1, 2005.

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The RELAP5-3D computer program has been improved with regard to its nearly-implicit numerical scheme for twophase flow and single-phase flow. Changes were made to the nearly-implicit numerical scheme finite difference momentum equations as follows: (1) added the velocity flip-flop mass/energy error mitigation logic, (2) added the modified Henry-Fauske choking model, (3) used the new time void fraction in the horizontal stratification force terms and gravity head, and (4) used an implicit form of the artificial viscosity. The code modifications allow the nearly-implicit numerical scheme to be more implicit and lead to enhanced numerical stability.

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  • 13th International Conferene on Nuclear Engineering (ICONE-13),Beijing, China,05/16/2005,05/20/2005

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  • Report No.: INEEL/CON-05-02633
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 911080
  • Archival Resource Key: ark:/67531/metadc878346

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  • May 1, 2005

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 8:47 p.m.

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Riemke, Richard A.; Weaver, Walter L. & Schultz, RIchard R. Improvements to the RELAP5-3D Nearly-Implicit Numerical Scheme, article, May 1, 2005; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc878346/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.