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Convergence Acceleration for Heat Transfer and Structural Simulations Using Adaptive Mesh Refinement

[+] Author Affiliations
Jianhu Nie, Yitung Chen, David A. Hopkins, Hsuan-Tsung Hsieh

University of Nevada at Las Vegas

Lijian Sun

U.S.Army Research Laboratory

Paper No. IMECE2006-15132, pp. 521-529; 9 pages
doi:10.1115/IMECE2006-15132
From:
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 3
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4786-1 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME

abstract

A finite element program with h-type mesh adaptation is developed and several test cases for heat transfer, fluid mechanics and structural mechanics are selected for code validations. The element division method is used because of its advantage of avoiding overly twisted elements during mesh refinement and recovery. The adaptive mesh is refined only in the localization region where the feature gradient is high. The overall mesh refinement and the h-adaptive mesh refinement are justified with respect to the computational accuracy and the CPU time cost. Both can improve the computational accuracy. The overall mesh refinement causes the CPU time to greatly increase. However, the CPU time does not increase very much with the increase of the level of h-adaptive mesh refinement. The CPU time cost can be saved using the developed program by orders of magnitude, especially for the system with a large number of elements and nodes.

Copyright © 2006 by ASME

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