Thermal expansion for charring ablative materials

Rui Fu, Haoyue Weng, Jonathan F. Wenk, Alexandre Martin

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


A mesh moving scheme is developed and tested in a finite-volume thermo-mechanical solver to investigate the effects of geometry deformation on thermal protection system materials. Verification cases are conducted to test the implementation of the moving mesh scheme. An iso-Q sample is used to demonstrate the swelling of thermal protection system materials on a realistic geometry. The results show that, under certain conditions, thermal expansion should not be ignored. The resulting local thermal strain reaches up to 30% and suggests that strain effects on the material properties should be considered. Moreover, the geometric expansion may also result in changes in the surrounding flow field, which may ultimately change the incoming heat flux and many boundary conditions.

Original languageEnglish
Pages (from-to)57-65
Number of pages9
JournalJournal of Thermophysics and Heat Transfer
Issue number1
StatePublished - 2020

Bibliographical note

Funding Information:
Financial support for this work was provided by the NASA SpaceTech-REDDI-2017-ESI Award 80NSSC18K0261 and Kentucky Science and Engineering Foundation Research and Development Excellence Program award number KSEF-3939-RDE-020. The

Publisher Copyright:
© 2019 by the American Institute of Aeronautics and Astronautics, Inc.

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Space and Planetary Science


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