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A numerical analysis of thermal conductivity, thermal dispersion, and structural effects in the injection part of the resin transfer molding process

Layeghi, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1615/JPorMedia.v13.i4.80
  3. Publisher: 2010
  4. Abstract:
  5. Thermal conductivity, thermal dispersion, and structural effects in resin transfer molding (RTM) process are studied numerically. The injection part of the RTM process is modeled as a transport of resin flow through a fibrous porous medium in a long rectangular channel. The fluid flow is modeled using the Darcy-Brinkman-Forchheimer model and the heat transfer process using the energy equation based on local thermal equilibrium assumption. Both isotropic and anisotropic heat transfer in porous media are investigated. The governing equations are solved numerically for the isotropic heat transfer case and analytically for the anisotropic case. The numerical results are fitted to the available experimental data with at most 3% discrepancy, and the effective thermal conductivity of the fibrous porous medium is estimated. Taking into account the quadratic dependency of dispersion conductivity on Peclet number, the Chang model is recommended for the prediction of stagnant thermal conductivity as well as a correlation for dispersion conductivity. Finally, the effects of structural parameters on temperature distribution and velocity profiles are investigated
  6. Keywords:
  7. Numerical method ; Darcy-Brinkman-forchheimer model ; Dispersion conductivity ; Effective thermal conductivity ; Energy equation ; Experimental data ; Fibrous porous medium ; Fluid flow ; Governing equations ; Heat transfer process ; Local thermal equilibrium ; Numerical results ; Porous Media ; Porous medium ; Rectangular channel ; Resin flows ; RTM process ; Structural effect ; Structural parameter ; Thermal dispersion ; Velocity profiles ; Anisotropic media ; Anisotropy ; Dispersions ; Flow of fluids ; Heat exchangers ; Heat transfer ; Molding ; Number theory ; Numerical analysis ; Numerical methods ; Porous materials ; Resins ; Thermal conductivity ; Thermoanalysis ; Transfer cases (vehicles) ; Resin transfer molding
  8. Source: Journal of Porous Media ; Volume 13, Issue 4 , 2010 , Pages 375-385 ; 1091028X (ISSN)
  9. URL: http://www.dl.begellhouse.com/journals/49dcde6d4c0809db,17b74a2d663d085d,529095484c1d17c0.html