Similarity relations of resin flow in resin transfer molding process

Moon Kwang Um*, Joon Hyung Byun, Isaac M. Daniel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Liquid molding processes, such as resin transfer molding, involve resin flow through a porous medium inside a mold cavity. Numerical analysis of resin flow and mold filling is a very useful means for optimization of the manufacturing process. However, the numerical analysis is quite time consuming and requires a great deal of effort, since a separate numerical calculation is needed for every set of material properties, part size and injection conditions. The efforts can be appreciably reduced if similarity solutions are used instead of repeated numerical calculations. In this study, the similarity relations for pressure, resin velocity and flow front propagation are proposed to correlate another desired case from the already obtained numerical result. In other words, the model gives a correlation of flow induced variables between two different cases. The model was verified by comparing results obtained by the similarity relation and by independent numerical simulation.

Original languageEnglish (US)
Pages (from-to)135-152
Number of pages18
JournalAdvanced Composite Materials
Issue number2
StatePublished - May 1 2009


  • Pressure relation
  • Relation of flow front advancement time
  • Resin transfer molding
  • Similarity relations of flow field
  • Velocity relation

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering


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